Merge pull request #4699 from rust-lang/rustup-2025-11-17

Automatic Rustup

Author: RalfJung

.gitignore

@@ -48,7 +48,7 @@ no_llvm_build
 /llvm/
 /mingw-build/
 /build
-/build-rust-analyzer/
+/build-rust-analyzer
 /dist/
 /unicode-downloads
 /target

Cargo.lock

@@ -80,9 +80,9 @@ dependencies = [
 
 [[package]]
 name = "annotate-snippets"
-version = "0.12.8"
+version = "0.12.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "025c7edcdffa4ccc5c0905f472a0ae3759378cfbef88ef518a3575e19ae3aebd"
+checksum = "a44baf24dd94e781f74dfe67ffee75a09a57971ddf0f615a178b4f6d404b48ff"
 dependencies = [
 "anstyle",
 "unicode-width 0.2.2",
@@ -3766,7 +3766,7 @@ dependencies = [
 name = "rustc_errors"
 version = "0.0.0"
 dependencies = [
-"annotate-snippets 0.12.8",
+"annotate-snippets 0.12.9",
 "anstream",
 "anstyle",
 "derive_setters",
@@ -6070,9 +6070,9 @@ dependencies = [
 
 [[package]]
 name = "wasi-preview1-component-adapter-provider"
-version = "37.0.2"
+version = "38.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8d0fcd636ad2b29a7c0490799a23ad61d1c8dedfafdb970447fddd0549502b60"
+checksum = "7ec3ef3783e18f2457796ed91b1e6c2adc46f2905f740d1527ab3053fe8e5682"
 
 [[package]]
 name = "wasm-bindgen"
@@ -6134,17 +6134,17 @@ dependencies = [
 
 [[package]]
 name = "wasm-component-ld"
-version = "0.5.18"
+version = "0.5.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11f565dfcfd9aabb10d865b608a92ce1f93051aeb56f4c89550ed9cd97d8ce0e"
+checksum = "4bfc50dd0b883d841bc1dba5ff7020ca52fa7b2c3bb1266d8bf6a09dd032e115"
 dependencies = [
 "anyhow",
 "clap",
 "lexopt",
 "libc",
 "tempfile",
 "wasi-preview1-component-adapter-provider",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 "wat",
 "windows-sys 0.61.2",
 "winsplit",
@@ -6171,24 +6171,24 @@ dependencies = [
 
 [[package]]
 name = "wasm-encoder"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06d642d8c5ecc083aafe9ceb32809276a304547a3a6eeecceb5d8152598bc71f"
+checksum = "e01164c9dda68301e34fdae536c23ed6fe90ce6d97213ccc171eebbd3d02d6b8"
 dependencies = [
 "leb128fmt",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 ]
 
 [[package]]
 name = "wasm-metadata"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee093e1e1ccffa005b9b778f7a10ccfd58e25a20eccad294a1a93168d076befb"
+checksum = "876fe286f2fa416386deedebe8407e6f19e0b5aeaef3d03161e77a15fa80f167"
 dependencies = [
 "anyhow",
 "indexmap",
-"wasm-encoder 0.240.0",
-"wasmparser 0.240.0",
+"wasm-encoder 0.241.2",
+"wasmparser 0.241.2",
 ]
 
 [[package]]
@@ -6213,9 +6213,9 @@ dependencies = [
 
 [[package]]
 name = "wasmparser"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b722dcf61e0ea47440b53ff83ccb5df8efec57a69d150e4f24882e4eba7e24a4"
+checksum = "46d90019b1afd4b808c263e428de644f3003691f243387d30d673211ee0cb8e8"
 dependencies = [
 "bitflags",
 "hashbrown",
@@ -6226,22 +6226,22 @@ dependencies = [
 
 [[package]]
 name = "wast"
-version = "240.0.0"
+version = "241.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0efe1c93db4ac562b9733e3dca19ed7fc878dba29aef22245acf84f13da4a19"
+checksum = "63f66e07e2ddf531fef6344dbf94d112df7c2f23ed6ffb10962e711500b8d816"
 dependencies = [
 "bumpalo",
 "leb128fmt",
 "memchr",
 "unicode-width 0.2.2",
-"wasm-encoder 0.240.0",
+"wasm-encoder 0.241.2",
 ]
 
 [[package]]
 name = "wat"
-version = "1.240.0"
+version = "1.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ec9b6eab7ecd4d639d78515e9ea491c9bacf494aa5eda10823bd35992cf8c1e"
+checksum = "45f923705c40830af909c5dec2352ec2821202e4a66008194585e1917458a26d"
 dependencies = [
 "wast",
 ]
@@ -6679,9 +6679,9 @@ dependencies = [
 
 [[package]]
 name = "wit-component"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dc5474b078addc5fe8a72736de8da3acfb3ff324c2491133f8b59594afa1a20"
+checksum = "1fd0c57df25e7ee612d946d3b7646c1ddb2310f8280aa2c17e543b66e0812241"
 dependencies = [
 "anyhow",
 "bitflags",
@@ -6690,17 +6690,17 @@ dependencies = [
 "serde",
 "serde_derive",
 "serde_json",
-"wasm-encoder 0.240.0",
+"wasm-encoder 0.241.2",
 "wasm-metadata",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 "wit-parser",
 ]
 
 [[package]]
 name = "wit-parser"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9875ea3fa272f57cc1fc50f225a7b94021a7878c484b33792bccad0d93223439"
+checksum = "09ef1c6ad67f35c831abd4039c02894de97034100899614d1c44e2268ad01c91"
 dependencies = [
 "anyhow",
 "id-arena",
@@ -6711,7 +6711,7 @@ dependencies = [
 "serde_derive",
 "serde_json",
 "unicode-xid",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 ]
 
 [[package]]

bootstrap.example.toml

@@ -59,7 +59,10 @@
 # toolchain or changing LLVM locally, you probably want to leave this enabled.
 #
 # Set this to `true` to download if CI llvm available otherwise it builds
-# from `src/llvm-project`.
+# from `src/llvm-project`. If you set it to `true`, it's safe and time-saving to run
+# `git submodule deinit src/llvm-project` to avoid git updating the llvm-project submodule
+# when building compiler locally.
+#
 #
 # Set this to `"if-unchanged"` to download only if the llvm-project has not
 # been modified. You can also use this if you are unsure whether you're on a

compiler/rustc_abi/src/extern_abi.rs

@@ -269,13 +269,56 @@ impl ExternAbi {
  | Self::Aapcs{ .. }
  | Self::Win64{ .. }
  | Self::SysV64{ .. }
- | Self::EfiApi => CVariadicStatus::Stable,
-Self::System{ .. } => {
-CVariadicStatus::Unstable{feature: rustc_span::sym::extern_system_varargs }
-}
+ | Self::EfiApi
+ | Self::System{ .. } => CVariadicStatus::Stable,
  _ => CVariadicStatus::NotSupported,
 }
 }
+
+/// Returns whether the ABI supports guaranteed tail calls.
+#[cfg(feature = "nightly")]
+pubfnsupports_guaranteed_tail_call(self) -> bool{
+matchself{
+Self::CmseNonSecureCall | Self::CmseNonSecureEntry => {
+// See https://godbolt.org/z/9jhdeqErv. The CMSE calling conventions clear registers
+// before returning, and hence cannot guarantee a tail call.
+false
+}
+Self::AvrInterrupt
+ | Self::AvrNonBlockingInterrupt
+ | Self::Msp430Interrupt
+ | Self::RiscvInterruptM
+ | Self::RiscvInterruptS
+ | Self::X86Interrupt => {
+// See https://godbolt.org/z/Edfjnxxcq. Interrupts cannot be called directly.
+false
+}
+Self::GpuKernel | Self::PtxKernel => {
+// See https://godbolt.org/z/jq5TE5jK1.
+false
+}
+Self::Custom => {
+// This ABI does not support calls at all (except via assembly).
+false
+}
+Self::C{ .. }
+ | Self::System{ .. }
+ | Self::Rust
+ | Self::RustCall
+ | Self::RustCold
+ | Self::RustInvalid
+ | Self::Unadjusted
+ | Self::EfiApi
+ | Self::Aapcs{ .. }
+ | Self::Cdecl{ .. }
+ | Self::Stdcall{ .. }
+ | Self::Fastcall{ .. }
+ | Self::Thiscall{ .. }
+ | Self::Vectorcall{ .. }
+ | Self::SysV64{ .. }
+ | Self::Win64{ .. } => true,
+}
+}
 }
 
 pubfnall_names() -> Vec<&'staticstr>{

compiler/rustc_ast_lowering/src/expr.rs

@@ -1929,7 +1929,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
 /// ControlFlow::Break(residual) =>
 /// #[allow(unreachable_code)]
 /// // If there is an enclosing `try {...}`:
-/// break 'catch_target Try::from_residual(residual),
+/// break 'catch_target Residual::into_try_type(residual),
 /// // Otherwise:
 /// return Try::from_residual(residual),
 /// }
@@ -1979,7 +1979,11 @@ impl<'hir> LoweringContext<'_, 'hir> {
 let(residual_local, residual_local_nid) = self.pat_ident(try_span, residual_ident);
 let residual_expr = self.expr_ident_mut(try_span, residual_ident, residual_local_nid);
 let from_residual_expr = self.wrap_in_try_constructor(
- hir::LangItem::TryTraitFromResidual,
+ifself.catch_scope.is_some(){
+ hir::LangItem::ResidualIntoTryType
+}else{
+ hir::LangItem::TryTraitFromResidual
+},
  try_span,
 self.arena.alloc(residual_expr),
  unstable_span,

compiler/rustc_ast_lowering/src/lib.rs

@@ -183,7 +183,12 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
 impl_trait_defs:Vec::new(),
 impl_trait_bounds:Vec::new(),
 allow_contracts:[sym::contracts_internals].into(),
-allow_try_trait:[sym::try_trait_v2, sym::yeet_desugar_details].into(),
+allow_try_trait:[
+ sym::try_trait_v2,
+ sym::try_trait_v2_residual,
+ sym::yeet_desugar_details,
+]
+.into(),
 allow_pattern_type:[sym::pattern_types, sym::pattern_type_range_trait].into(),
 allow_gen_future:if tcx.features().async_fn_track_caller(){
 [sym::gen_future, sym::closure_track_caller].into()

compiler/rustc_codegen_llvm/src/back/write.rs

@@ -683,7 +683,7 @@ pub(crate) unsafe fn llvm_optimize(
 // Here we map the old arguments to the new arguments, with an offset of 1 to make sure
 // that we don't use the newly added `%dyn_ptr`.
 unsafe{
- llvm::LLVMRustOffloadMapper(cx.llmod(),old_fn, new_fn);
+ llvm::LLVMRustOffloadMapper(old_fn, new_fn);
 }
 
  llvm::set_linkage(new_fn, llvm::get_linkage(old_fn));

.gitignore

@@ -48,7 +48,7 @@ no_llvm_build
 /llvm/
 /mingw-build/
 /build
-/build-rust-analyzer/
+/build-rust-analyzer
 /dist/
 /unicode-downloads
 /target

Cargo.lock

@@ -80,9 +80,9 @@ dependencies = [
 
 [[package]]
 name = "annotate-snippets"
-version = "0.12.8"
+version = "0.12.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "025c7edcdffa4ccc5c0905f472a0ae3759378cfbef88ef518a3575e19ae3aebd"
+checksum = "a44baf24dd94e781f74dfe67ffee75a09a57971ddf0f615a178b4f6d404b48ff"
 dependencies = [
 "anstyle",
 "unicode-width 0.2.2",
@@ -3766,7 +3766,7 @@ dependencies = [
 name = "rustc_errors"
 version = "0.0.0"
 dependencies = [
-"annotate-snippets 0.12.8",
+"annotate-snippets 0.12.9",
 "anstream",
 "anstyle",
 "derive_setters",
@@ -6070,9 +6070,9 @@ dependencies = [
 
 [[package]]
 name = "wasi-preview1-component-adapter-provider"
-version = "37.0.2"
+version = "38.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8d0fcd636ad2b29a7c0490799a23ad61d1c8dedfafdb970447fddd0549502b60"
+checksum = "7ec3ef3783e18f2457796ed91b1e6c2adc46f2905f740d1527ab3053fe8e5682"
 
 [[package]]
 name = "wasm-bindgen"
@@ -6134,17 +6134,17 @@ dependencies = [
 
 [[package]]
 name = "wasm-component-ld"
-version = "0.5.18"
+version = "0.5.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11f565dfcfd9aabb10d865b608a92ce1f93051aeb56f4c89550ed9cd97d8ce0e"
+checksum = "4bfc50dd0b883d841bc1dba5ff7020ca52fa7b2c3bb1266d8bf6a09dd032e115"
 dependencies = [
 "anyhow",
 "clap",
 "lexopt",
 "libc",
 "tempfile",
 "wasi-preview1-component-adapter-provider",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 "wat",
 "windows-sys 0.61.2",
 "winsplit",
@@ -6171,24 +6171,24 @@ dependencies = [
 
 [[package]]
 name = "wasm-encoder"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06d642d8c5ecc083aafe9ceb32809276a304547a3a6eeecceb5d8152598bc71f"
+checksum = "e01164c9dda68301e34fdae536c23ed6fe90ce6d97213ccc171eebbd3d02d6b8"
 dependencies = [
 "leb128fmt",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 ]
 
 [[package]]
 name = "wasm-metadata"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee093e1e1ccffa005b9b778f7a10ccfd58e25a20eccad294a1a93168d076befb"
+checksum = "876fe286f2fa416386deedebe8407e6f19e0b5aeaef3d03161e77a15fa80f167"
 dependencies = [
 "anyhow",
 "indexmap",
-"wasm-encoder 0.240.0",
-"wasmparser 0.240.0",
+"wasm-encoder 0.241.2",
+"wasmparser 0.241.2",
 ]
 
 [[package]]
@@ -6213,9 +6213,9 @@ dependencies = [
 
 [[package]]
 name = "wasmparser"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b722dcf61e0ea47440b53ff83ccb5df8efec57a69d150e4f24882e4eba7e24a4"
+checksum = "46d90019b1afd4b808c263e428de644f3003691f243387d30d673211ee0cb8e8"
 dependencies = [
 "bitflags",
 "hashbrown",
@@ -6226,22 +6226,22 @@ dependencies = [
 
 [[package]]
 name = "wast"
-version = "240.0.0"
+version = "241.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0efe1c93db4ac562b9733e3dca19ed7fc878dba29aef22245acf84f13da4a19"
+checksum = "63f66e07e2ddf531fef6344dbf94d112df7c2f23ed6ffb10962e711500b8d816"
 dependencies = [
 "bumpalo",
 "leb128fmt",
 "memchr",
 "unicode-width 0.2.2",
-"wasm-encoder 0.240.0",
+"wasm-encoder 0.241.2",
 ]
 
 [[package]]
 name = "wat"
-version = "1.240.0"
+version = "1.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ec9b6eab7ecd4d639d78515e9ea491c9bacf494aa5eda10823bd35992cf8c1e"
+checksum = "45f923705c40830af909c5dec2352ec2821202e4a66008194585e1917458a26d"
 dependencies = [
 "wast",
 ]
@@ -6679,9 +6679,9 @@ dependencies = [
 
 [[package]]
 name = "wit-component"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dc5474b078addc5fe8a72736de8da3acfb3ff324c2491133f8b59594afa1a20"
+checksum = "1fd0c57df25e7ee612d946d3b7646c1ddb2310f8280aa2c17e543b66e0812241"
 dependencies = [
 "anyhow",
 "bitflags",
@@ -6690,17 +6690,17 @@ dependencies = [
 "serde",
 "serde_derive",
 "serde_json",
-"wasm-encoder 0.240.0",
+"wasm-encoder 0.241.2",
 "wasm-metadata",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 "wit-parser",
 ]
 
 [[package]]
 name = "wit-parser"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9875ea3fa272f57cc1fc50f225a7b94021a7878c484b33792bccad0d93223439"
+checksum = "09ef1c6ad67f35c831abd4039c02894de97034100899614d1c44e2268ad01c91"
 dependencies = [
 "anyhow",
 "id-arena",
@@ -6711,7 +6711,7 @@ dependencies = [
 "serde_derive",
 "serde_json",
 "unicode-xid",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 ]
 
 [[package]]

bootstrap.example.toml

@@ -59,7 +59,10 @@
 # toolchain or changing LLVM locally, you probably want to leave this enabled.
 #
 # Set this to `true` to download if CI llvm available otherwise it builds
-# from `src/llvm-project`.
+# from `src/llvm-project`. If you set it to `true`, it's safe and time-saving to run
+# `git submodule deinit src/llvm-project` to avoid git updating the llvm-project submodule
+# when building compiler locally.
+#
 #
 # Set this to `"if-unchanged"` to download only if the llvm-project has not
 # been modified. You can also use this if you are unsure whether you're on a

compiler/rustc_abi/src/extern_abi.rs

@@ -269,13 +269,56 @@ impl ExternAbi {
  | Self::Aapcs{ .. }
  | Self::Win64{ .. }
  | Self::SysV64{ .. }
- | Self::EfiApi => CVariadicStatus::Stable,
-Self::System{ .. } => {
-CVariadicStatus::Unstable{feature: rustc_span::sym::extern_system_varargs }
-}
+ | Self::EfiApi
+ | Self::System{ .. } => CVariadicStatus::Stable,
  _ => CVariadicStatus::NotSupported,
 }
 }
+
+/// Returns whether the ABI supports guaranteed tail calls.
+#[cfg(feature = "nightly")]
+pubfnsupports_guaranteed_tail_call(self) -> bool{
+matchself{
+Self::CmseNonSecureCall | Self::CmseNonSecureEntry => {
+// See https://godbolt.org/z/9jhdeqErv. The CMSE calling conventions clear registers
+// before returning, and hence cannot guarantee a tail call.
+false
+}
+Self::AvrInterrupt
+ | Self::AvrNonBlockingInterrupt
+ | Self::Msp430Interrupt
+ | Self::RiscvInterruptM
+ | Self::RiscvInterruptS
+ | Self::X86Interrupt => {
+// See https://godbolt.org/z/Edfjnxxcq. Interrupts cannot be called directly.
+false
+}
+Self::GpuKernel | Self::PtxKernel => {
+// See https://godbolt.org/z/jq5TE5jK1.
+false
+}
+Self::Custom => {
+// This ABI does not support calls at all (except via assembly).
+false
+}
+Self::C{ .. }
+ | Self::System{ .. }
+ | Self::Rust
+ | Self::RustCall
+ | Self::RustCold
+ | Self::RustInvalid
+ | Self::Unadjusted
+ | Self::EfiApi
+ | Self::Aapcs{ .. }
+ | Self::Cdecl{ .. }
+ | Self::Stdcall{ .. }
+ | Self::Fastcall{ .. }
+ | Self::Thiscall{ .. }
+ | Self::Vectorcall{ .. }
+ | Self::SysV64{ .. }
+ | Self::Win64{ .. } => true,
+}
+}
 }
 
 pubfnall_names() -> Vec<&'staticstr>{

compiler/rustc_ast_lowering/src/expr.rs

@@ -1929,7 +1929,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
 /// ControlFlow::Break(residual) =>
 /// #[allow(unreachable_code)]
 /// // If there is an enclosing `try {...}`:
-/// break 'catch_target Try::from_residual(residual),
+/// break 'catch_target Residual::into_try_type(residual),
 /// // Otherwise:
 /// return Try::from_residual(residual),
 /// }
@@ -1979,7 +1979,11 @@ impl<'hir> LoweringContext<'_, 'hir> {
 let(residual_local, residual_local_nid) = self.pat_ident(try_span, residual_ident);
 let residual_expr = self.expr_ident_mut(try_span, residual_ident, residual_local_nid);
 let from_residual_expr = self.wrap_in_try_constructor(
- hir::LangItem::TryTraitFromResidual,
+ifself.catch_scope.is_some(){
+ hir::LangItem::ResidualIntoTryType
+}else{
+ hir::LangItem::TryTraitFromResidual
+},
  try_span,
 self.arena.alloc(residual_expr),
  unstable_span,

compiler/rustc_ast_lowering/src/lib.rs

@@ -183,7 +183,12 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
 impl_trait_defs:Vec::new(),
 impl_trait_bounds:Vec::new(),
 allow_contracts:[sym::contracts_internals].into(),
-allow_try_trait:[sym::try_trait_v2, sym::yeet_desugar_details].into(),
+allow_try_trait:[
+ sym::try_trait_v2,
+ sym::try_trait_v2_residual,
+ sym::yeet_desugar_details,
+]
+.into(),
 allow_pattern_type:[sym::pattern_types, sym::pattern_type_range_trait].into(),
 allow_gen_future:if tcx.features().async_fn_track_caller(){
 [sym::gen_future, sym::closure_track_caller].into()

compiler/rustc_codegen_llvm/src/back/write.rs

@@ -683,7 +683,7 @@ pub(crate) unsafe fn llvm_optimize(
 // Here we map the old arguments to the new arguments, with an offset of 1 to make sure
 // that we don't use the newly added `%dyn_ptr`.
 unsafe{
- llvm::LLVMRustOffloadMapper(cx.llmod(),old_fn, new_fn);
+ llvm::LLVMRustOffloadMapper(old_fn, new_fn);
 }
 
  llvm::set_linkage(new_fn, llvm::get_linkage(old_fn));

.gitignore

@@ -48,7 +48,7 @@ no_llvm_build
 /llvm/
 /mingw-build/
 /build
-/build-rust-analyzer/
+/build-rust-analyzer
 /dist/
 /unicode-downloads
 /target

Cargo.lock

@@ -80,9 +80,9 @@ dependencies = [
 
 [[package]]
 name = "annotate-snippets"
-version = "0.12.8"
+version = "0.12.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "025c7edcdffa4ccc5c0905f472a0ae3759378cfbef88ef518a3575e19ae3aebd"
+checksum = "a44baf24dd94e781f74dfe67ffee75a09a57971ddf0f615a178b4f6d404b48ff"
 dependencies = [
 "anstyle",
 "unicode-width 0.2.2",
@@ -3766,7 +3766,7 @@ dependencies = [
 name = "rustc_errors"
 version = "0.0.0"
 dependencies = [
-"annotate-snippets 0.12.8",
+"annotate-snippets 0.12.9",
 "anstream",
 "anstyle",
 "derive_setters",
@@ -6070,9 +6070,9 @@ dependencies = [
 
 [[package]]
 name = "wasi-preview1-component-adapter-provider"
-version = "37.0.2"
+version = "38.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8d0fcd636ad2b29a7c0490799a23ad61d1c8dedfafdb970447fddd0549502b60"
+checksum = "7ec3ef3783e18f2457796ed91b1e6c2adc46f2905f740d1527ab3053fe8e5682"
 
 [[package]]
 name = "wasm-bindgen"
@@ -6134,17 +6134,17 @@ dependencies = [
 
 [[package]]
 name = "wasm-component-ld"
-version = "0.5.18"
+version = "0.5.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11f565dfcfd9aabb10d865b608a92ce1f93051aeb56f4c89550ed9cd97d8ce0e"
+checksum = "4bfc50dd0b883d841bc1dba5ff7020ca52fa7b2c3bb1266d8bf6a09dd032e115"
 dependencies = [
 "anyhow",
 "clap",
 "lexopt",
 "libc",
 "tempfile",
 "wasi-preview1-component-adapter-provider",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 "wat",
 "windows-sys 0.61.2",
 "winsplit",
@@ -6171,24 +6171,24 @@ dependencies = [
 
 [[package]]
 name = "wasm-encoder"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06d642d8c5ecc083aafe9ceb32809276a304547a3a6eeecceb5d8152598bc71f"
+checksum = "e01164c9dda68301e34fdae536c23ed6fe90ce6d97213ccc171eebbd3d02d6b8"
 dependencies = [
 "leb128fmt",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 ]
 
 [[package]]
 name = "wasm-metadata"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee093e1e1ccffa005b9b778f7a10ccfd58e25a20eccad294a1a93168d076befb"
+checksum = "876fe286f2fa416386deedebe8407e6f19e0b5aeaef3d03161e77a15fa80f167"
 dependencies = [
 "anyhow",
 "indexmap",
-"wasm-encoder 0.240.0",
-"wasmparser 0.240.0",
+"wasm-encoder 0.241.2",
+"wasmparser 0.241.2",
 ]
 
 [[package]]
@@ -6213,9 +6213,9 @@ dependencies = [
 
 [[package]]
 name = "wasmparser"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b722dcf61e0ea47440b53ff83ccb5df8efec57a69d150e4f24882e4eba7e24a4"
+checksum = "46d90019b1afd4b808c263e428de644f3003691f243387d30d673211ee0cb8e8"
 dependencies = [
 "bitflags",
 "hashbrown",
@@ -6226,22 +6226,22 @@ dependencies = [
 
 [[package]]
 name = "wast"
-version = "240.0.0"
+version = "241.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0efe1c93db4ac562b9733e3dca19ed7fc878dba29aef22245acf84f13da4a19"
+checksum = "63f66e07e2ddf531fef6344dbf94d112df7c2f23ed6ffb10962e711500b8d816"
 dependencies = [
 "bumpalo",
 "leb128fmt",
 "memchr",
 "unicode-width 0.2.2",
-"wasm-encoder 0.240.0",
+"wasm-encoder 0.241.2",
 ]
 
 [[package]]
 name = "wat"
-version = "1.240.0"
+version = "1.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ec9b6eab7ecd4d639d78515e9ea491c9bacf494aa5eda10823bd35992cf8c1e"
+checksum = "45f923705c40830af909c5dec2352ec2821202e4a66008194585e1917458a26d"
 dependencies = [
 "wast",
 ]
@@ -6679,9 +6679,9 @@ dependencies = [
 
 [[package]]
 name = "wit-component"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dc5474b078addc5fe8a72736de8da3acfb3ff324c2491133f8b59594afa1a20"
+checksum = "1fd0c57df25e7ee612d946d3b7646c1ddb2310f8280aa2c17e543b66e0812241"
 dependencies = [
 "anyhow",
 "bitflags",
@@ -6690,17 +6690,17 @@ dependencies = [
 "serde",
 "serde_derive",
 "serde_json",
-"wasm-encoder 0.240.0",
+"wasm-encoder 0.241.2",
 "wasm-metadata",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 "wit-parser",
 ]
 
 [[package]]
 name = "wit-parser"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9875ea3fa272f57cc1fc50f225a7b94021a7878c484b33792bccad0d93223439"
+checksum = "09ef1c6ad67f35c831abd4039c02894de97034100899614d1c44e2268ad01c91"
 dependencies = [
 "anyhow",
 "id-arena",
@@ -6711,7 +6711,7 @@ dependencies = [
 "serde_derive",
 "serde_json",
 "unicode-xid",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 ]
 
 [[package]]

bootstrap.example.toml

@@ -59,7 +59,10 @@
 # toolchain or changing LLVM locally, you probably want to leave this enabled.
 #
 # Set this to `true` to download if CI llvm available otherwise it builds
-# from `src/llvm-project`.
+# from `src/llvm-project`. If you set it to `true`, it's safe and time-saving to run
+# `git submodule deinit src/llvm-project` to avoid git updating the llvm-project submodule
+# when building compiler locally.
+#
 #
 # Set this to `"if-unchanged"` to download only if the llvm-project has not
 # been modified. You can also use this if you are unsure whether you're on a

compiler/rustc_abi/src/extern_abi.rs

@@ -269,13 +269,56 @@ impl ExternAbi {
  | Self::Aapcs{ .. }
  | Self::Win64{ .. }
  | Self::SysV64{ .. }
- | Self::EfiApi => CVariadicStatus::Stable,
-Self::System{ .. } => {
-CVariadicStatus::Unstable{feature: rustc_span::sym::extern_system_varargs }
-}
+ | Self::EfiApi
+ | Self::System{ .. } => CVariadicStatus::Stable,
  _ => CVariadicStatus::NotSupported,
 }
 }
+
+/// Returns whether the ABI supports guaranteed tail calls.
+#[cfg(feature = "nightly")]
+pubfnsupports_guaranteed_tail_call(self) -> bool{
+matchself{
+Self::CmseNonSecureCall | Self::CmseNonSecureEntry => {
+// See https://godbolt.org/z/9jhdeqErv. The CMSE calling conventions clear registers
+// before returning, and hence cannot guarantee a tail call.
+false
+}
+Self::AvrInterrupt
+ | Self::AvrNonBlockingInterrupt
+ | Self::Msp430Interrupt
+ | Self::RiscvInterruptM
+ | Self::RiscvInterruptS
+ | Self::X86Interrupt => {
+// See https://godbolt.org/z/Edfjnxxcq. Interrupts cannot be called directly.
+false
+}
+Self::GpuKernel | Self::PtxKernel => {
+// See https://godbolt.org/z/jq5TE5jK1.
+false
+}
+Self::Custom => {
+// This ABI does not support calls at all (except via assembly).
+false
+}
+Self::C{ .. }
+ | Self::System{ .. }
+ | Self::Rust
+ | Self::RustCall
+ | Self::RustCold
+ | Self::RustInvalid
+ | Self::Unadjusted
+ | Self::EfiApi
+ | Self::Aapcs{ .. }
+ | Self::Cdecl{ .. }
+ | Self::Stdcall{ .. }
+ | Self::Fastcall{ .. }
+ | Self::Thiscall{ .. }
+ | Self::Vectorcall{ .. }
+ | Self::SysV64{ .. }
+ | Self::Win64{ .. } => true,
+}
+}
 }
 
 pubfnall_names() -> Vec<&'staticstr>{

compiler/rustc_ast_lowering/src/expr.rs

@@ -1929,7 +1929,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
 /// ControlFlow::Break(residual) =>
 /// #[allow(unreachable_code)]
 /// // If there is an enclosing `try {...}`:
-/// break 'catch_target Try::from_residual(residual),
+/// break 'catch_target Residual::into_try_type(residual),
 /// // Otherwise:
 /// return Try::from_residual(residual),
 /// }
@@ -1979,7 +1979,11 @@ impl<'hir> LoweringContext<'_, 'hir> {
 let(residual_local, residual_local_nid) = self.pat_ident(try_span, residual_ident);
 let residual_expr = self.expr_ident_mut(try_span, residual_ident, residual_local_nid);
 let from_residual_expr = self.wrap_in_try_constructor(
- hir::LangItem::TryTraitFromResidual,
+ifself.catch_scope.is_some(){
+ hir::LangItem::ResidualIntoTryType
+}else{
+ hir::LangItem::TryTraitFromResidual
+},
  try_span,
 self.arena.alloc(residual_expr),
  unstable_span,

compiler/rustc_ast_lowering/src/lib.rs

@@ -183,7 +183,12 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
 impl_trait_defs:Vec::new(),
 impl_trait_bounds:Vec::new(),
 allow_contracts:[sym::contracts_internals].into(),
-allow_try_trait:[sym::try_trait_v2, sym::yeet_desugar_details].into(),
+allow_try_trait:[
+ sym::try_trait_v2,
+ sym::try_trait_v2_residual,
+ sym::yeet_desugar_details,
+]
+.into(),
 allow_pattern_type:[sym::pattern_types, sym::pattern_type_range_trait].into(),
 allow_gen_future:if tcx.features().async_fn_track_caller(){
 [sym::gen_future, sym::closure_track_caller].into()

compiler/rustc_codegen_llvm/src/back/write.rs

@@ -683,7 +683,7 @@ pub(crate) unsafe fn llvm_optimize(
 // Here we map the old arguments to the new arguments, with an offset of 1 to make sure
 // that we don't use the newly added `%dyn_ptr`.
 unsafe{
- llvm::LLVMRustOffloadMapper(cx.llmod(),old_fn, new_fn);
+ llvm::LLVMRustOffloadMapper(old_fn, new_fn);
 }
 
  llvm::set_linkage(new_fn, llvm::get_linkage(old_fn));

.gitignore

@@ -48,7 +48,7 @@ no_llvm_build
 /llvm/
 /mingw-build/
 /build
-/build-rust-analyzer/
+/build-rust-analyzer
 /dist/
 /unicode-downloads
 /target

Cargo.lock

@@ -80,9 +80,9 @@ dependencies = [
 
 [[package]]
 name = "annotate-snippets"
-version = "0.12.8"
+version = "0.12.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "025c7edcdffa4ccc5c0905f472a0ae3759378cfbef88ef518a3575e19ae3aebd"
+checksum = "a44baf24dd94e781f74dfe67ffee75a09a57971ddf0f615a178b4f6d404b48ff"
 dependencies = [
 "anstyle",
 "unicode-width 0.2.2",
@@ -3766,7 +3766,7 @@ dependencies = [
 name = "rustc_errors"
 version = "0.0.0"
 dependencies = [
-"annotate-snippets 0.12.8",
+"annotate-snippets 0.12.9",
 "anstream",
 "anstyle",
 "derive_setters",
@@ -6070,9 +6070,9 @@ dependencies = [
 
 [[package]]
 name = "wasi-preview1-component-adapter-provider"
-version = "37.0.2"
+version = "38.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8d0fcd636ad2b29a7c0490799a23ad61d1c8dedfafdb970447fddd0549502b60"
+checksum = "7ec3ef3783e18f2457796ed91b1e6c2adc46f2905f740d1527ab3053fe8e5682"
 
 [[package]]
 name = "wasm-bindgen"
@@ -6134,17 +6134,17 @@ dependencies = [
 
 [[package]]
 name = "wasm-component-ld"
-version = "0.5.18"
+version = "0.5.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11f565dfcfd9aabb10d865b608a92ce1f93051aeb56f4c89550ed9cd97d8ce0e"
+checksum = "4bfc50dd0b883d841bc1dba5ff7020ca52fa7b2c3bb1266d8bf6a09dd032e115"
 dependencies = [
 "anyhow",
 "clap",
 "lexopt",
 "libc",
 "tempfile",
 "wasi-preview1-component-adapter-provider",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 "wat",
 "windows-sys 0.61.2",
 "winsplit",
@@ -6171,24 +6171,24 @@ dependencies = [
 
 [[package]]
 name = "wasm-encoder"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06d642d8c5ecc083aafe9ceb32809276a304547a3a6eeecceb5d8152598bc71f"
+checksum = "e01164c9dda68301e34fdae536c23ed6fe90ce6d97213ccc171eebbd3d02d6b8"
 dependencies = [
 "leb128fmt",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 ]
 
 [[package]]
 name = "wasm-metadata"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee093e1e1ccffa005b9b778f7a10ccfd58e25a20eccad294a1a93168d076befb"
+checksum = "876fe286f2fa416386deedebe8407e6f19e0b5aeaef3d03161e77a15fa80f167"
 dependencies = [
 "anyhow",
 "indexmap",
-"wasm-encoder 0.240.0",
-"wasmparser 0.240.0",
+"wasm-encoder 0.241.2",
+"wasmparser 0.241.2",
 ]
 
 [[package]]
@@ -6213,9 +6213,9 @@ dependencies = [
 
 [[package]]
 name = "wasmparser"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b722dcf61e0ea47440b53ff83ccb5df8efec57a69d150e4f24882e4eba7e24a4"
+checksum = "46d90019b1afd4b808c263e428de644f3003691f243387d30d673211ee0cb8e8"
 dependencies = [
 "bitflags",
 "hashbrown",
@@ -6226,22 +6226,22 @@ dependencies = [
 
 [[package]]
 name = "wast"
-version = "240.0.0"
+version = "241.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0efe1c93db4ac562b9733e3dca19ed7fc878dba29aef22245acf84f13da4a19"
+checksum = "63f66e07e2ddf531fef6344dbf94d112df7c2f23ed6ffb10962e711500b8d816"
 dependencies = [
 "bumpalo",
 "leb128fmt",
 "memchr",
 "unicode-width 0.2.2",
-"wasm-encoder 0.240.0",
+"wasm-encoder 0.241.2",
 ]
 
 [[package]]
 name = "wat"
-version = "1.240.0"
+version = "1.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ec9b6eab7ecd4d639d78515e9ea491c9bacf494aa5eda10823bd35992cf8c1e"
+checksum = "45f923705c40830af909c5dec2352ec2821202e4a66008194585e1917458a26d"
 dependencies = [
 "wast",
 ]
@@ -6679,9 +6679,9 @@ dependencies = [
 
 [[package]]
 name = "wit-component"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dc5474b078addc5fe8a72736de8da3acfb3ff324c2491133f8b59594afa1a20"
+checksum = "1fd0c57df25e7ee612d946d3b7646c1ddb2310f8280aa2c17e543b66e0812241"
 dependencies = [
 "anyhow",
 "bitflags",
@@ -6690,17 +6690,17 @@ dependencies = [
 "serde",
 "serde_derive",
 "serde_json",
-"wasm-encoder 0.240.0",
+"wasm-encoder 0.241.2",
 "wasm-metadata",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 "wit-parser",
 ]
 
 [[package]]
 name = "wit-parser"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9875ea3fa272f57cc1fc50f225a7b94021a7878c484b33792bccad0d93223439"
+checksum = "09ef1c6ad67f35c831abd4039c02894de97034100899614d1c44e2268ad01c91"
 dependencies = [
 "anyhow",
 "id-arena",
@@ -6711,7 +6711,7 @@ dependencies = [
 "serde_derive",
 "serde_json",
 "unicode-xid",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 ]
 
 [[package]]

bootstrap.example.toml

@@ -59,7 +59,10 @@
 # toolchain or changing LLVM locally, you probably want to leave this enabled.
 #
 # Set this to `true` to download if CI llvm available otherwise it builds
-# from `src/llvm-project`.
+# from `src/llvm-project`. If you set it to `true`, it's safe and time-saving to run
+# `git submodule deinit src/llvm-project` to avoid git updating the llvm-project submodule
+# when building compiler locally.
+#
 #
 # Set this to `"if-unchanged"` to download only if the llvm-project has not
 # been modified. You can also use this if you are unsure whether you're on a

compiler/rustc_abi/src/extern_abi.rs

@@ -269,13 +269,56 @@ impl ExternAbi {
  | Self::Aapcs{ .. }
  | Self::Win64{ .. }
  | Self::SysV64{ .. }
- | Self::EfiApi => CVariadicStatus::Stable,
-Self::System{ .. } => {
-CVariadicStatus::Unstable{feature: rustc_span::sym::extern_system_varargs }
-}
+ | Self::EfiApi
+ | Self::System{ .. } => CVariadicStatus::Stable,
  _ => CVariadicStatus::NotSupported,
 }
 }
+
+/// Returns whether the ABI supports guaranteed tail calls.
+#[cfg(feature = "nightly")]
+pubfnsupports_guaranteed_tail_call(self) -> bool{
+matchself{
+Self::CmseNonSecureCall | Self::CmseNonSecureEntry => {
+// See https://godbolt.org/z/9jhdeqErv. The CMSE calling conventions clear registers
+// before returning, and hence cannot guarantee a tail call.
+false
+}
+Self::AvrInterrupt
+ | Self::AvrNonBlockingInterrupt
+ | Self::Msp430Interrupt
+ | Self::RiscvInterruptM
+ | Self::RiscvInterruptS
+ | Self::X86Interrupt => {
+// See https://godbolt.org/z/Edfjnxxcq. Interrupts cannot be called directly.
+false
+}
+Self::GpuKernel | Self::PtxKernel => {
+// See https://godbolt.org/z/jq5TE5jK1.
+false
+}
+Self::Custom => {
+// This ABI does not support calls at all (except via assembly).
+false
+}
+Self::C{ .. }
+ | Self::System{ .. }
+ | Self::Rust
+ | Self::RustCall
+ | Self::RustCold
+ | Self::RustInvalid
+ | Self::Unadjusted
+ | Self::EfiApi
+ | Self::Aapcs{ .. }
+ | Self::Cdecl{ .. }
+ | Self::Stdcall{ .. }
+ | Self::Fastcall{ .. }
+ | Self::Thiscall{ .. }
+ | Self::Vectorcall{ .. }
+ | Self::SysV64{ .. }
+ | Self::Win64{ .. } => true,
+}
+}
 }
 
 pubfnall_names() -> Vec<&'staticstr>{

compiler/rustc_ast_lowering/src/expr.rs

@@ -1929,7 +1929,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
 /// ControlFlow::Break(residual) =>
 /// #[allow(unreachable_code)]
 /// // If there is an enclosing `try {...}`:
-/// break 'catch_target Try::from_residual(residual),
+/// break 'catch_target Residual::into_try_type(residual),
 /// // Otherwise:
 /// return Try::from_residual(residual),
 /// }
@@ -1979,7 +1979,11 @@ impl<'hir> LoweringContext<'_, 'hir> {
 let(residual_local, residual_local_nid) = self.pat_ident(try_span, residual_ident);
 let residual_expr = self.expr_ident_mut(try_span, residual_ident, residual_local_nid);
 let from_residual_expr = self.wrap_in_try_constructor(
- hir::LangItem::TryTraitFromResidual,
+ifself.catch_scope.is_some(){
+ hir::LangItem::ResidualIntoTryType
+}else{
+ hir::LangItem::TryTraitFromResidual
+},
  try_span,
 self.arena.alloc(residual_expr),
  unstable_span,

compiler/rustc_ast_lowering/src/lib.rs

@@ -183,7 +183,12 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
 impl_trait_defs:Vec::new(),
 impl_trait_bounds:Vec::new(),
 allow_contracts:[sym::contracts_internals].into(),
-allow_try_trait:[sym::try_trait_v2, sym::yeet_desugar_details].into(),
+allow_try_trait:[
+ sym::try_trait_v2,
+ sym::try_trait_v2_residual,
+ sym::yeet_desugar_details,
+]
+.into(),
 allow_pattern_type:[sym::pattern_types, sym::pattern_type_range_trait].into(),
 allow_gen_future:if tcx.features().async_fn_track_caller(){
 [sym::gen_future, sym::closure_track_caller].into()

compiler/rustc_codegen_llvm/src/back/write.rs

@@ -683,7 +683,7 @@ pub(crate) unsafe fn llvm_optimize(
 // Here we map the old arguments to the new arguments, with an offset of 1 to make sure
 // that we don't use the newly added `%dyn_ptr`.
 unsafe{
- llvm::LLVMRustOffloadMapper(cx.llmod(),old_fn, new_fn);
+ llvm::LLVMRustOffloadMapper(old_fn, new_fn);
 }
 
  llvm::set_linkage(new_fn, llvm::get_linkage(old_fn));

.gitignore

@@ -48,7 +48,7 @@ no_llvm_build
 /llvm/
 /mingw-build/
 /build
-/build-rust-analyzer/
+/build-rust-analyzer
 /dist/
 /unicode-downloads
 /target

Cargo.lock

@@ -80,9 +80,9 @@ dependencies = [
 
 [[package]]
 name = "annotate-snippets"
-version = "0.12.8"
+version = "0.12.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "025c7edcdffa4ccc5c0905f472a0ae3759378cfbef88ef518a3575e19ae3aebd"
+checksum = "a44baf24dd94e781f74dfe67ffee75a09a57971ddf0f615a178b4f6d404b48ff"
 dependencies = [
 "anstyle",
 "unicode-width 0.2.2",
@@ -3766,7 +3766,7 @@ dependencies = [
 name = "rustc_errors"
 version = "0.0.0"
 dependencies = [
-"annotate-snippets 0.12.8",
+"annotate-snippets 0.12.9",
 "anstream",
 "anstyle",
 "derive_setters",
@@ -6070,9 +6070,9 @@ dependencies = [
 
 [[package]]
 name = "wasi-preview1-component-adapter-provider"
-version = "37.0.2"
+version = "38.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8d0fcd636ad2b29a7c0490799a23ad61d1c8dedfafdb970447fddd0549502b60"
+checksum = "7ec3ef3783e18f2457796ed91b1e6c2adc46f2905f740d1527ab3053fe8e5682"
 
 [[package]]
 name = "wasm-bindgen"
@@ -6134,17 +6134,17 @@ dependencies = [
 
 [[package]]
 name = "wasm-component-ld"
-version = "0.5.18"
+version = "0.5.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11f565dfcfd9aabb10d865b608a92ce1f93051aeb56f4c89550ed9cd97d8ce0e"
+checksum = "4bfc50dd0b883d841bc1dba5ff7020ca52fa7b2c3bb1266d8bf6a09dd032e115"
 dependencies = [
 "anyhow",
 "clap",
 "lexopt",
 "libc",
 "tempfile",
 "wasi-preview1-component-adapter-provider",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 "wat",
 "windows-sys 0.61.2",
 "winsplit",
@@ -6171,24 +6171,24 @@ dependencies = [
 
 [[package]]
 name = "wasm-encoder"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06d642d8c5ecc083aafe9ceb32809276a304547a3a6eeecceb5d8152598bc71f"
+checksum = "e01164c9dda68301e34fdae536c23ed6fe90ce6d97213ccc171eebbd3d02d6b8"
 dependencies = [
 "leb128fmt",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 ]
 
 [[package]]
 name = "wasm-metadata"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee093e1e1ccffa005b9b778f7a10ccfd58e25a20eccad294a1a93168d076befb"
+checksum = "876fe286f2fa416386deedebe8407e6f19e0b5aeaef3d03161e77a15fa80f167"
 dependencies = [
 "anyhow",
 "indexmap",
-"wasm-encoder 0.240.0",
-"wasmparser 0.240.0",
+"wasm-encoder 0.241.2",
+"wasmparser 0.241.2",
 ]
 
 [[package]]
@@ -6213,9 +6213,9 @@ dependencies = [
 
 [[package]]
 name = "wasmparser"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b722dcf61e0ea47440b53ff83ccb5df8efec57a69d150e4f24882e4eba7e24a4"
+checksum = "46d90019b1afd4b808c263e428de644f3003691f243387d30d673211ee0cb8e8"
 dependencies = [
 "bitflags",
 "hashbrown",
@@ -6226,22 +6226,22 @@ dependencies = [
 
 [[package]]
 name = "wast"
-version = "240.0.0"
+version = "241.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0efe1c93db4ac562b9733e3dca19ed7fc878dba29aef22245acf84f13da4a19"
+checksum = "63f66e07e2ddf531fef6344dbf94d112df7c2f23ed6ffb10962e711500b8d816"
 dependencies = [
 "bumpalo",
 "leb128fmt",
 "memchr",
 "unicode-width 0.2.2",
-"wasm-encoder 0.240.0",
+"wasm-encoder 0.241.2",
 ]
 
 [[package]]
 name = "wat"
-version = "1.240.0"
+version = "1.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ec9b6eab7ecd4d639d78515e9ea491c9bacf494aa5eda10823bd35992cf8c1e"
+checksum = "45f923705c40830af909c5dec2352ec2821202e4a66008194585e1917458a26d"
 dependencies = [
 "wast",
 ]
@@ -6679,9 +6679,9 @@ dependencies = [
 
 [[package]]
 name = "wit-component"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dc5474b078addc5fe8a72736de8da3acfb3ff324c2491133f8b59594afa1a20"
+checksum = "1fd0c57df25e7ee612d946d3b7646c1ddb2310f8280aa2c17e543b66e0812241"
 dependencies = [
 "anyhow",
 "bitflags",
@@ -6690,17 +6690,17 @@ dependencies = [
 "serde",
 "serde_derive",
 "serde_json",
-"wasm-encoder 0.240.0",
+"wasm-encoder 0.241.2",
 "wasm-metadata",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 "wit-parser",
 ]
 
 [[package]]
 name = "wit-parser"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9875ea3fa272f57cc1fc50f225a7b94021a7878c484b33792bccad0d93223439"
+checksum = "09ef1c6ad67f35c831abd4039c02894de97034100899614d1c44e2268ad01c91"
 dependencies = [
 "anyhow",
 "id-arena",
@@ -6711,7 +6711,7 @@ dependencies = [
 "serde_derive",
 "serde_json",
 "unicode-xid",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 ]
 
 [[package]]

bootstrap.example.toml

@@ -59,7 +59,10 @@
 # toolchain or changing LLVM locally, you probably want to leave this enabled.
 #
 # Set this to `true` to download if CI llvm available otherwise it builds
-# from `src/llvm-project`.
+# from `src/llvm-project`. If you set it to `true`, it's safe and time-saving to run
+# `git submodule deinit src/llvm-project` to avoid git updating the llvm-project submodule
+# when building compiler locally.
+#
 #
 # Set this to `"if-unchanged"` to download only if the llvm-project has not
 # been modified. You can also use this if you are unsure whether you're on a

compiler/rustc_abi/src/extern_abi.rs

@@ -269,13 +269,56 @@ impl ExternAbi {
  | Self::Aapcs{ .. }
  | Self::Win64{ .. }
  | Self::SysV64{ .. }
- | Self::EfiApi => CVariadicStatus::Stable,
-Self::System{ .. } => {
-CVariadicStatus::Unstable{feature: rustc_span::sym::extern_system_varargs }
-}
+ | Self::EfiApi
+ | Self::System{ .. } => CVariadicStatus::Stable,
  _ => CVariadicStatus::NotSupported,
 }
 }
+
+/// Returns whether the ABI supports guaranteed tail calls.
+#[cfg(feature = "nightly")]
+pubfnsupports_guaranteed_tail_call(self) -> bool{
+matchself{
+Self::CmseNonSecureCall | Self::CmseNonSecureEntry => {
+// See https://godbolt.org/z/9jhdeqErv. The CMSE calling conventions clear registers
+// before returning, and hence cannot guarantee a tail call.
+false
+}
+Self::AvrInterrupt
+ | Self::AvrNonBlockingInterrupt
+ | Self::Msp430Interrupt
+ | Self::RiscvInterruptM
+ | Self::RiscvInterruptS
+ | Self::X86Interrupt => {
+// See https://godbolt.org/z/Edfjnxxcq. Interrupts cannot be called directly.
+false
+}
+Self::GpuKernel | Self::PtxKernel => {
+// See https://godbolt.org/z/jq5TE5jK1.
+false
+}
+Self::Custom => {
+// This ABI does not support calls at all (except via assembly).
+false
+}
+Self::C{ .. }
+ | Self::System{ .. }
+ | Self::Rust
+ | Self::RustCall
+ | Self::RustCold
+ | Self::RustInvalid
+ | Self::Unadjusted
+ | Self::EfiApi
+ | Self::Aapcs{ .. }
+ | Self::Cdecl{ .. }
+ | Self::Stdcall{ .. }
+ | Self::Fastcall{ .. }
+ | Self::Thiscall{ .. }
+ | Self::Vectorcall{ .. }
+ | Self::SysV64{ .. }
+ | Self::Win64{ .. } => true,
+}
+}
 }
 
 pubfnall_names() -> Vec<&'staticstr>{

compiler/rustc_ast_lowering/src/expr.rs

@@ -1929,7 +1929,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
 /// ControlFlow::Break(residual) =>
 /// #[allow(unreachable_code)]
 /// // If there is an enclosing `try {...}`:
-/// break 'catch_target Try::from_residual(residual),
+/// break 'catch_target Residual::into_try_type(residual),
 /// // Otherwise:
 /// return Try::from_residual(residual),
 /// }
@@ -1979,7 +1979,11 @@ impl<'hir> LoweringContext<'_, 'hir> {
 let(residual_local, residual_local_nid) = self.pat_ident(try_span, residual_ident);
 let residual_expr = self.expr_ident_mut(try_span, residual_ident, residual_local_nid);
 let from_residual_expr = self.wrap_in_try_constructor(
- hir::LangItem::TryTraitFromResidual,
+ifself.catch_scope.is_some(){
+ hir::LangItem::ResidualIntoTryType
+}else{
+ hir::LangItem::TryTraitFromResidual
+},
  try_span,
 self.arena.alloc(residual_expr),
  unstable_span,

compiler/rustc_ast_lowering/src/lib.rs

@@ -183,7 +183,12 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
 impl_trait_defs:Vec::new(),
 impl_trait_bounds:Vec::new(),
 allow_contracts:[sym::contracts_internals].into(),
-allow_try_trait:[sym::try_trait_v2, sym::yeet_desugar_details].into(),
+allow_try_trait:[
+ sym::try_trait_v2,
+ sym::try_trait_v2_residual,
+ sym::yeet_desugar_details,
+]
+.into(),
 allow_pattern_type:[sym::pattern_types, sym::pattern_type_range_trait].into(),
 allow_gen_future:if tcx.features().async_fn_track_caller(){
 [sym::gen_future, sym::closure_track_caller].into()

compiler/rustc_codegen_llvm/src/back/write.rs

@@ -683,7 +683,7 @@ pub(crate) unsafe fn llvm_optimize(
 // Here we map the old arguments to the new arguments, with an offset of 1 to make sure
 // that we don't use the newly added `%dyn_ptr`.
 unsafe{
- llvm::LLVMRustOffloadMapper(cx.llmod(),old_fn, new_fn);
+ llvm::LLVMRustOffloadMapper(old_fn, new_fn);
 }
 
  llvm::set_linkage(new_fn, llvm::get_linkage(old_fn));

.gitignore

@@ -48,7 +48,7 @@ no_llvm_build
 /llvm/
 /mingw-build/
 /build
-/build-rust-analyzer/
+/build-rust-analyzer
 /dist/
 /unicode-downloads
 /target

Cargo.lock

@@ -80,9 +80,9 @@ dependencies = [
 
 [[package]]
 name = "annotate-snippets"
-version = "0.12.8"
+version = "0.12.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "025c7edcdffa4ccc5c0905f472a0ae3759378cfbef88ef518a3575e19ae3aebd"
+checksum = "a44baf24dd94e781f74dfe67ffee75a09a57971ddf0f615a178b4f6d404b48ff"
 dependencies = [
 "anstyle",
 "unicode-width 0.2.2",
@@ -3766,7 +3766,7 @@ dependencies = [
 name = "rustc_errors"
 version = "0.0.0"
 dependencies = [
-"annotate-snippets 0.12.8",
+"annotate-snippets 0.12.9",
 "anstream",
 "anstyle",
 "derive_setters",
@@ -6070,9 +6070,9 @@ dependencies = [
 
 [[package]]
 name = "wasi-preview1-component-adapter-provider"
-version = "37.0.2"
+version = "38.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8d0fcd636ad2b29a7c0490799a23ad61d1c8dedfafdb970447fddd0549502b60"
+checksum = "7ec3ef3783e18f2457796ed91b1e6c2adc46f2905f740d1527ab3053fe8e5682"
 
 [[package]]
 name = "wasm-bindgen"
@@ -6134,17 +6134,17 @@ dependencies = [
 
 [[package]]
 name = "wasm-component-ld"
-version = "0.5.18"
+version = "0.5.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11f565dfcfd9aabb10d865b608a92ce1f93051aeb56f4c89550ed9cd97d8ce0e"
+checksum = "4bfc50dd0b883d841bc1dba5ff7020ca52fa7b2c3bb1266d8bf6a09dd032e115"
 dependencies = [
 "anyhow",
 "clap",
 "lexopt",
 "libc",
 "tempfile",
 "wasi-preview1-component-adapter-provider",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 "wat",
 "windows-sys 0.61.2",
 "winsplit",
@@ -6171,24 +6171,24 @@ dependencies = [
 
 [[package]]
 name = "wasm-encoder"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06d642d8c5ecc083aafe9ceb32809276a304547a3a6eeecceb5d8152598bc71f"
+checksum = "e01164c9dda68301e34fdae536c23ed6fe90ce6d97213ccc171eebbd3d02d6b8"
 dependencies = [
 "leb128fmt",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 ]
 
 [[package]]
 name = "wasm-metadata"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee093e1e1ccffa005b9b778f7a10ccfd58e25a20eccad294a1a93168d076befb"
+checksum = "876fe286f2fa416386deedebe8407e6f19e0b5aeaef3d03161e77a15fa80f167"
 dependencies = [
 "anyhow",
 "indexmap",
-"wasm-encoder 0.240.0",
-"wasmparser 0.240.0",
+"wasm-encoder 0.241.2",
+"wasmparser 0.241.2",
 ]
 
 [[package]]
@@ -6213,9 +6213,9 @@ dependencies = [
 
 [[package]]
 name = "wasmparser"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b722dcf61e0ea47440b53ff83ccb5df8efec57a69d150e4f24882e4eba7e24a4"
+checksum = "46d90019b1afd4b808c263e428de644f3003691f243387d30d673211ee0cb8e8"
 dependencies = [
 "bitflags",
 "hashbrown",
@@ -6226,22 +6226,22 @@ dependencies = [
 
 [[package]]
 name = "wast"
-version = "240.0.0"
+version = "241.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0efe1c93db4ac562b9733e3dca19ed7fc878dba29aef22245acf84f13da4a19"
+checksum = "63f66e07e2ddf531fef6344dbf94d112df7c2f23ed6ffb10962e711500b8d816"
 dependencies = [
 "bumpalo",
 "leb128fmt",
 "memchr",
 "unicode-width 0.2.2",
-"wasm-encoder 0.240.0",
+"wasm-encoder 0.241.2",
 ]
 
 [[package]]
 name = "wat"
-version = "1.240.0"
+version = "1.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ec9b6eab7ecd4d639d78515e9ea491c9bacf494aa5eda10823bd35992cf8c1e"
+checksum = "45f923705c40830af909c5dec2352ec2821202e4a66008194585e1917458a26d"
 dependencies = [
 "wast",
 ]
@@ -6679,9 +6679,9 @@ dependencies = [
 
 [[package]]
 name = "wit-component"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dc5474b078addc5fe8a72736de8da3acfb3ff324c2491133f8b59594afa1a20"
+checksum = "1fd0c57df25e7ee612d946d3b7646c1ddb2310f8280aa2c17e543b66e0812241"
 dependencies = [
 "anyhow",
 "bitflags",
@@ -6690,17 +6690,17 @@ dependencies = [
 "serde",
 "serde_derive",
 "serde_json",
-"wasm-encoder 0.240.0",
+"wasm-encoder 0.241.2",
 "wasm-metadata",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 "wit-parser",
 ]
 
 [[package]]
 name = "wit-parser"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9875ea3fa272f57cc1fc50f225a7b94021a7878c484b33792bccad0d93223439"
+checksum = "09ef1c6ad67f35c831abd4039c02894de97034100899614d1c44e2268ad01c91"
 dependencies = [
 "anyhow",
 "id-arena",
@@ -6711,7 +6711,7 @@ dependencies = [
 "serde_derive",
 "serde_json",
 "unicode-xid",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 ]
 
 [[package]]

bootstrap.example.toml

@@ -59,7 +59,10 @@
 # toolchain or changing LLVM locally, you probably want to leave this enabled.
 #
 # Set this to `true` to download if CI llvm available otherwise it builds
-# from `src/llvm-project`.
+# from `src/llvm-project`. If you set it to `true`, it's safe and time-saving to run
+# `git submodule deinit src/llvm-project` to avoid git updating the llvm-project submodule
+# when building compiler locally.
+#
 #
 # Set this to `"if-unchanged"` to download only if the llvm-project has not
 # been modified. You can also use this if you are unsure whether you're on a

compiler/rustc_abi/src/extern_abi.rs

@@ -269,13 +269,56 @@ impl ExternAbi {
  | Self::Aapcs{ .. }
  | Self::Win64{ .. }
  | Self::SysV64{ .. }
- | Self::EfiApi => CVariadicStatus::Stable,
-Self::System{ .. } => {
-CVariadicStatus::Unstable{feature: rustc_span::sym::extern_system_varargs }
-}
+ | Self::EfiApi
+ | Self::System{ .. } => CVariadicStatus::Stable,
  _ => CVariadicStatus::NotSupported,
 }
 }
+
+/// Returns whether the ABI supports guaranteed tail calls.
+#[cfg(feature = "nightly")]
+pubfnsupports_guaranteed_tail_call(self) -> bool{
+matchself{
+Self::CmseNonSecureCall | Self::CmseNonSecureEntry => {
+// See https://godbolt.org/z/9jhdeqErv. The CMSE calling conventions clear registers
+// before returning, and hence cannot guarantee a tail call.
+false
+}
+Self::AvrInterrupt
+ | Self::AvrNonBlockingInterrupt
+ | Self::Msp430Interrupt
+ | Self::RiscvInterruptM
+ | Self::RiscvInterruptS
+ | Self::X86Interrupt => {
+// See https://godbolt.org/z/Edfjnxxcq. Interrupts cannot be called directly.
+false
+}
+Self::GpuKernel | Self::PtxKernel => {
+// See https://godbolt.org/z/jq5TE5jK1.
+false
+}
+Self::Custom => {
+// This ABI does not support calls at all (except via assembly).
+false
+}
+Self::C{ .. }
+ | Self::System{ .. }
+ | Self::Rust
+ | Self::RustCall
+ | Self::RustCold
+ | Self::RustInvalid
+ | Self::Unadjusted
+ | Self::EfiApi
+ | Self::Aapcs{ .. }
+ | Self::Cdecl{ .. }
+ | Self::Stdcall{ .. }
+ | Self::Fastcall{ .. }
+ | Self::Thiscall{ .. }
+ | Self::Vectorcall{ .. }
+ | Self::SysV64{ .. }
+ | Self::Win64{ .. } => true,
+}
+}
 }
 
 pubfnall_names() -> Vec<&'staticstr>{

compiler/rustc_ast_lowering/src/expr.rs

@@ -1929,7 +1929,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
 /// ControlFlow::Break(residual) =>
 /// #[allow(unreachable_code)]
 /// // If there is an enclosing `try {...}`:
-/// break 'catch_target Try::from_residual(residual),
+/// break 'catch_target Residual::into_try_type(residual),
 /// // Otherwise:
 /// return Try::from_residual(residual),
 /// }
@@ -1979,7 +1979,11 @@ impl<'hir> LoweringContext<'_, 'hir> {
 let(residual_local, residual_local_nid) = self.pat_ident(try_span, residual_ident);
 let residual_expr = self.expr_ident_mut(try_span, residual_ident, residual_local_nid);
 let from_residual_expr = self.wrap_in_try_constructor(
- hir::LangItem::TryTraitFromResidual,
+ifself.catch_scope.is_some(){
+ hir::LangItem::ResidualIntoTryType
+}else{
+ hir::LangItem::TryTraitFromResidual
+},
  try_span,
 self.arena.alloc(residual_expr),
  unstable_span,

compiler/rustc_ast_lowering/src/lib.rs

@@ -183,7 +183,12 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
 impl_trait_defs:Vec::new(),
 impl_trait_bounds:Vec::new(),
 allow_contracts:[sym::contracts_internals].into(),
-allow_try_trait:[sym::try_trait_v2, sym::yeet_desugar_details].into(),
+allow_try_trait:[
+ sym::try_trait_v2,
+ sym::try_trait_v2_residual,
+ sym::yeet_desugar_details,
+]
+.into(),
 allow_pattern_type:[sym::pattern_types, sym::pattern_type_range_trait].into(),
 allow_gen_future:if tcx.features().async_fn_track_caller(){
 [sym::gen_future, sym::closure_track_caller].into()

compiler/rustc_codegen_llvm/src/back/write.rs

@@ -683,7 +683,7 @@ pub(crate) unsafe fn llvm_optimize(
 // Here we map the old arguments to the new arguments, with an offset of 1 to make sure
 // that we don't use the newly added `%dyn_ptr`.
 unsafe{
- llvm::LLVMRustOffloadMapper(cx.llmod(),old_fn, new_fn);
+ llvm::LLVMRustOffloadMapper(old_fn, new_fn);
 }
 
  llvm::set_linkage(new_fn, llvm::get_linkage(old_fn));

.gitignore

@@ -48,7 +48,7 @@ no_llvm_build
 /llvm/
 /mingw-build/
 /build
-/build-rust-analyzer/
+/build-rust-analyzer
 /dist/
 /unicode-downloads
 /target

Cargo.lock

@@ -80,9 +80,9 @@ dependencies = [
 
 [[package]]
 name = "annotate-snippets"
-version = "0.12.8"
+version = "0.12.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "025c7edcdffa4ccc5c0905f472a0ae3759378cfbef88ef518a3575e19ae3aebd"
+checksum = "a44baf24dd94e781f74dfe67ffee75a09a57971ddf0f615a178b4f6d404b48ff"
 dependencies = [
 "anstyle",
 "unicode-width 0.2.2",
@@ -3766,7 +3766,7 @@ dependencies = [
 name = "rustc_errors"
 version = "0.0.0"
 dependencies = [
-"annotate-snippets 0.12.8",
+"annotate-snippets 0.12.9",
 "anstream",
 "anstyle",
 "derive_setters",
@@ -6070,9 +6070,9 @@ dependencies = [
 
 [[package]]
 name = "wasi-preview1-component-adapter-provider"
-version = "37.0.2"
+version = "38.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8d0fcd636ad2b29a7c0490799a23ad61d1c8dedfafdb970447fddd0549502b60"
+checksum = "7ec3ef3783e18f2457796ed91b1e6c2adc46f2905f740d1527ab3053fe8e5682"
 
 [[package]]
 name = "wasm-bindgen"
@@ -6134,17 +6134,17 @@ dependencies = [
 
 [[package]]
 name = "wasm-component-ld"
-version = "0.5.18"
+version = "0.5.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11f565dfcfd9aabb10d865b608a92ce1f93051aeb56f4c89550ed9cd97d8ce0e"
+checksum = "4bfc50dd0b883d841bc1dba5ff7020ca52fa7b2c3bb1266d8bf6a09dd032e115"
 dependencies = [
 "anyhow",
 "clap",
 "lexopt",
 "libc",
 "tempfile",
 "wasi-preview1-component-adapter-provider",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 "wat",
 "windows-sys 0.61.2",
 "winsplit",
@@ -6171,24 +6171,24 @@ dependencies = [
 
 [[package]]
 name = "wasm-encoder"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06d642d8c5ecc083aafe9ceb32809276a304547a3a6eeecceb5d8152598bc71f"
+checksum = "e01164c9dda68301e34fdae536c23ed6fe90ce6d97213ccc171eebbd3d02d6b8"
 dependencies = [
 "leb128fmt",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 ]
 
 [[package]]
 name = "wasm-metadata"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee093e1e1ccffa005b9b778f7a10ccfd58e25a20eccad294a1a93168d076befb"
+checksum = "876fe286f2fa416386deedebe8407e6f19e0b5aeaef3d03161e77a15fa80f167"
 dependencies = [
 "anyhow",
 "indexmap",
-"wasm-encoder 0.240.0",
-"wasmparser 0.240.0",
+"wasm-encoder 0.241.2",
+"wasmparser 0.241.2",
 ]
 
 [[package]]
@@ -6213,9 +6213,9 @@ dependencies = [
 
 [[package]]
 name = "wasmparser"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b722dcf61e0ea47440b53ff83ccb5df8efec57a69d150e4f24882e4eba7e24a4"
+checksum = "46d90019b1afd4b808c263e428de644f3003691f243387d30d673211ee0cb8e8"
 dependencies = [
 "bitflags",
 "hashbrown",
@@ -6226,22 +6226,22 @@ dependencies = [
 
 [[package]]
 name = "wast"
-version = "240.0.0"
+version = "241.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0efe1c93db4ac562b9733e3dca19ed7fc878dba29aef22245acf84f13da4a19"
+checksum = "63f66e07e2ddf531fef6344dbf94d112df7c2f23ed6ffb10962e711500b8d816"
 dependencies = [
 "bumpalo",
 "leb128fmt",
 "memchr",
 "unicode-width 0.2.2",
-"wasm-encoder 0.240.0",
+"wasm-encoder 0.241.2",
 ]
 
 [[package]]
 name = "wat"
-version = "1.240.0"
+version = "1.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ec9b6eab7ecd4d639d78515e9ea491c9bacf494aa5eda10823bd35992cf8c1e"
+checksum = "45f923705c40830af909c5dec2352ec2821202e4a66008194585e1917458a26d"
 dependencies = [
 "wast",
 ]
@@ -6679,9 +6679,9 @@ dependencies = [
 
 [[package]]
 name = "wit-component"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dc5474b078addc5fe8a72736de8da3acfb3ff324c2491133f8b59594afa1a20"
+checksum = "1fd0c57df25e7ee612d946d3b7646c1ddb2310f8280aa2c17e543b66e0812241"
 dependencies = [
 "anyhow",
 "bitflags",
@@ -6690,17 +6690,17 @@ dependencies = [
 "serde",
 "serde_derive",
 "serde_json",
-"wasm-encoder 0.240.0",
+"wasm-encoder 0.241.2",
 "wasm-metadata",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 "wit-parser",
 ]
 
 [[package]]
 name = "wit-parser"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9875ea3fa272f57cc1fc50f225a7b94021a7878c484b33792bccad0d93223439"
+checksum = "09ef1c6ad67f35c831abd4039c02894de97034100899614d1c44e2268ad01c91"
 dependencies = [
 "anyhow",
 "id-arena",
@@ -6711,7 +6711,7 @@ dependencies = [
 "serde_derive",
 "serde_json",
 "unicode-xid",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 ]
 
 [[package]]

bootstrap.example.toml

@@ -59,7 +59,10 @@
 # toolchain or changing LLVM locally, you probably want to leave this enabled.
 #
 # Set this to `true` to download if CI llvm available otherwise it builds
-# from `src/llvm-project`.
+# from `src/llvm-project`. If you set it to `true`, it's safe and time-saving to run
+# `git submodule deinit src/llvm-project` to avoid git updating the llvm-project submodule
+# when building compiler locally.
+#
 #
 # Set this to `"if-unchanged"` to download only if the llvm-project has not
 # been modified. You can also use this if you are unsure whether you're on a

compiler/rustc_abi/src/extern_abi.rs

@@ -269,13 +269,56 @@ impl ExternAbi {
  | Self::Aapcs{ .. }
  | Self::Win64{ .. }
  | Self::SysV64{ .. }
- | Self::EfiApi => CVariadicStatus::Stable,
-Self::System{ .. } => {
-CVariadicStatus::Unstable{feature: rustc_span::sym::extern_system_varargs }
-}
+ | Self::EfiApi
+ | Self::System{ .. } => CVariadicStatus::Stable,
  _ => CVariadicStatus::NotSupported,
 }
 }
+
+/// Returns whether the ABI supports guaranteed tail calls.
+#[cfg(feature = "nightly")]
+pubfnsupports_guaranteed_tail_call(self) -> bool{
+matchself{
+Self::CmseNonSecureCall | Self::CmseNonSecureEntry => {
+// See https://godbolt.org/z/9jhdeqErv. The CMSE calling conventions clear registers
+// before returning, and hence cannot guarantee a tail call.
+false
+}
+Self::AvrInterrupt
+ | Self::AvrNonBlockingInterrupt
+ | Self::Msp430Interrupt
+ | Self::RiscvInterruptM
+ | Self::RiscvInterruptS
+ | Self::X86Interrupt => {
+// See https://godbolt.org/z/Edfjnxxcq. Interrupts cannot be called directly.
+false
+}
+Self::GpuKernel | Self::PtxKernel => {
+// See https://godbolt.org/z/jq5TE5jK1.
+false
+}
+Self::Custom => {
+// This ABI does not support calls at all (except via assembly).
+false
+}
+Self::C{ .. }
+ | Self::System{ .. }
+ | Self::Rust
+ | Self::RustCall
+ | Self::RustCold
+ | Self::RustInvalid
+ | Self::Unadjusted
+ | Self::EfiApi
+ | Self::Aapcs{ .. }
+ | Self::Cdecl{ .. }
+ | Self::Stdcall{ .. }
+ | Self::Fastcall{ .. }
+ | Self::Thiscall{ .. }
+ | Self::Vectorcall{ .. }
+ | Self::SysV64{ .. }
+ | Self::Win64{ .. } => true,
+}
+}
 }
 
 pubfnall_names() -> Vec<&'staticstr>{

compiler/rustc_ast_lowering/src/expr.rs

@@ -1929,7 +1929,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
 /// ControlFlow::Break(residual) =>
 /// #[allow(unreachable_code)]
 /// // If there is an enclosing `try {...}`:
-/// break 'catch_target Try::from_residual(residual),
+/// break 'catch_target Residual::into_try_type(residual),
 /// // Otherwise:
 /// return Try::from_residual(residual),
 /// }
@@ -1979,7 +1979,11 @@ impl<'hir> LoweringContext<'_, 'hir> {
 let(residual_local, residual_local_nid) = self.pat_ident(try_span, residual_ident);
 let residual_expr = self.expr_ident_mut(try_span, residual_ident, residual_local_nid);
 let from_residual_expr = self.wrap_in_try_constructor(
- hir::LangItem::TryTraitFromResidual,
+ifself.catch_scope.is_some(){
+ hir::LangItem::ResidualIntoTryType
+}else{
+ hir::LangItem::TryTraitFromResidual
+},
  try_span,
 self.arena.alloc(residual_expr),
  unstable_span,

compiler/rustc_ast_lowering/src/lib.rs

@@ -183,7 +183,12 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
 impl_trait_defs:Vec::new(),
 impl_trait_bounds:Vec::new(),
 allow_contracts:[sym::contracts_internals].into(),
-allow_try_trait:[sym::try_trait_v2, sym::yeet_desugar_details].into(),
+allow_try_trait:[
+ sym::try_trait_v2,
+ sym::try_trait_v2_residual,
+ sym::yeet_desugar_details,
+]
+.into(),
 allow_pattern_type:[sym::pattern_types, sym::pattern_type_range_trait].into(),
 allow_gen_future:if tcx.features().async_fn_track_caller(){
 [sym::gen_future, sym::closure_track_caller].into()

compiler/rustc_codegen_llvm/src/back/write.rs

@@ -683,7 +683,7 @@ pub(crate) unsafe fn llvm_optimize(
 // Here we map the old arguments to the new arguments, with an offset of 1 to make sure
 // that we don't use the newly added `%dyn_ptr`.
 unsafe{
- llvm::LLVMRustOffloadMapper(cx.llmod(),old_fn, new_fn);
+ llvm::LLVMRustOffloadMapper(old_fn, new_fn);
 }
 
  llvm::set_linkage(new_fn, llvm::get_linkage(old_fn));

.gitignore

@@ -48,7 +48,7 @@ no_llvm_build
 /llvm/
 /mingw-build/
 /build
-/build-rust-analyzer/
+/build-rust-analyzer
 /dist/
 /unicode-downloads
 /target

Cargo.lock

@@ -80,9 +80,9 @@ dependencies = [
 
 [[package]]
 name = "annotate-snippets"
-version = "0.12.8"
+version = "0.12.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "025c7edcdffa4ccc5c0905f472a0ae3759378cfbef88ef518a3575e19ae3aebd"
+checksum = "a44baf24dd94e781f74dfe67ffee75a09a57971ddf0f615a178b4f6d404b48ff"
 dependencies = [
 "anstyle",
 "unicode-width 0.2.2",
@@ -3766,7 +3766,7 @@ dependencies = [
 name = "rustc_errors"
 version = "0.0.0"
 dependencies = [
-"annotate-snippets 0.12.8",
+"annotate-snippets 0.12.9",
 "anstream",
 "anstyle",
 "derive_setters",
@@ -6070,9 +6070,9 @@ dependencies = [
 
 [[package]]
 name = "wasi-preview1-component-adapter-provider"
-version = "37.0.2"
+version = "38.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8d0fcd636ad2b29a7c0490799a23ad61d1c8dedfafdb970447fddd0549502b60"
+checksum = "7ec3ef3783e18f2457796ed91b1e6c2adc46f2905f740d1527ab3053fe8e5682"
 
 [[package]]
 name = "wasm-bindgen"
@@ -6134,17 +6134,17 @@ dependencies = [
 
 [[package]]
 name = "wasm-component-ld"
-version = "0.5.18"
+version = "0.5.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11f565dfcfd9aabb10d865b608a92ce1f93051aeb56f4c89550ed9cd97d8ce0e"
+checksum = "4bfc50dd0b883d841bc1dba5ff7020ca52fa7b2c3bb1266d8bf6a09dd032e115"
 dependencies = [
 "anyhow",
 "clap",
 "lexopt",
 "libc",
 "tempfile",
 "wasi-preview1-component-adapter-provider",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 "wat",
 "windows-sys 0.61.2",
 "winsplit",
@@ -6171,24 +6171,24 @@ dependencies = [
 
 [[package]]
 name = "wasm-encoder"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06d642d8c5ecc083aafe9ceb32809276a304547a3a6eeecceb5d8152598bc71f"
+checksum = "e01164c9dda68301e34fdae536c23ed6fe90ce6d97213ccc171eebbd3d02d6b8"
 dependencies = [
 "leb128fmt",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 ]
 
 [[package]]
 name = "wasm-metadata"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee093e1e1ccffa005b9b778f7a10ccfd58e25a20eccad294a1a93168d076befb"
+checksum = "876fe286f2fa416386deedebe8407e6f19e0b5aeaef3d03161e77a15fa80f167"
 dependencies = [
 "anyhow",
 "indexmap",
-"wasm-encoder 0.240.0",
-"wasmparser 0.240.0",
+"wasm-encoder 0.241.2",
+"wasmparser 0.241.2",
 ]
 
 [[package]]
@@ -6213,9 +6213,9 @@ dependencies = [
 
 [[package]]
 name = "wasmparser"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b722dcf61e0ea47440b53ff83ccb5df8efec57a69d150e4f24882e4eba7e24a4"
+checksum = "46d90019b1afd4b808c263e428de644f3003691f243387d30d673211ee0cb8e8"
 dependencies = [
 "bitflags",
 "hashbrown",
@@ -6226,22 +6226,22 @@ dependencies = [
 
 [[package]]
 name = "wast"
-version = "240.0.0"
+version = "241.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0efe1c93db4ac562b9733e3dca19ed7fc878dba29aef22245acf84f13da4a19"
+checksum = "63f66e07e2ddf531fef6344dbf94d112df7c2f23ed6ffb10962e711500b8d816"
 dependencies = [
 "bumpalo",
 "leb128fmt",
 "memchr",
 "unicode-width 0.2.2",
-"wasm-encoder 0.240.0",
+"wasm-encoder 0.241.2",
 ]
 
 [[package]]
 name = "wat"
-version = "1.240.0"
+version = "1.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ec9b6eab7ecd4d639d78515e9ea491c9bacf494aa5eda10823bd35992cf8c1e"
+checksum = "45f923705c40830af909c5dec2352ec2821202e4a66008194585e1917458a26d"
 dependencies = [
 "wast",
 ]
@@ -6679,9 +6679,9 @@ dependencies = [
 
 [[package]]
 name = "wit-component"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dc5474b078addc5fe8a72736de8da3acfb3ff324c2491133f8b59594afa1a20"
+checksum = "1fd0c57df25e7ee612d946d3b7646c1ddb2310f8280aa2c17e543b66e0812241"
 dependencies = [
 "anyhow",
 "bitflags",
@@ -6690,17 +6690,17 @@ dependencies = [
 "serde",
 "serde_derive",
 "serde_json",
-"wasm-encoder 0.240.0",
+"wasm-encoder 0.241.2",
 "wasm-metadata",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 "wit-parser",
 ]
 
 [[package]]
 name = "wit-parser"
-version = "0.240.0"
+version = "0.241.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9875ea3fa272f57cc1fc50f225a7b94021a7878c484b33792bccad0d93223439"
+checksum = "09ef1c6ad67f35c831abd4039c02894de97034100899614d1c44e2268ad01c91"
 dependencies = [
 "anyhow",
 "id-arena",
@@ -6711,7 +6711,7 @@ dependencies = [
 "serde_derive",
 "serde_json",
 "unicode-xid",
-"wasmparser 0.240.0",
+"wasmparser 0.241.2",
 ]
 
 [[package]]

bootstrap.example.toml

@@ -59,7 +59,10 @@
 # toolchain or changing LLVM locally, you probably want to leave this enabled.
 #
 # Set this to `true` to download if CI llvm available otherwise it builds
-# from `src/llvm-project`.
+# from `src/llvm-project`. If you set it to `true`, it's safe and time-saving to run
+# `git submodule deinit src/llvm-project` to avoid git updating the llvm-project submodule
+# when building compiler locally.
+#
 #
 # Set this to `"if-unchanged"` to download only if the llvm-project has not
 # been modified. You can also use this if you are unsure whether you're on a

compiler/rustc_abi/src/extern_abi.rs

@@ -269,13 +269,56 @@ impl ExternAbi {
  | Self::Aapcs{ .. }
  | Self::Win64{ .. }
  | Self::SysV64{ .. }
- | Self::EfiApi => CVariadicStatus::Stable,
-Self::System{ .. } => {
-CVariadicStatus::Unstable{feature: rustc_span::sym::extern_system_varargs }
-}
+ | Self::EfiApi
+ | Self::System{ .. } => CVariadicStatus::Stable,
  _ => CVariadicStatus::NotSupported,
 }
 }
+
+/// Returns whether the ABI supports guaranteed tail calls.
+#[cfg(feature = "nightly")]
+pubfnsupports_guaranteed_tail_call(self) -> bool{
+matchself{
+Self::CmseNonSecureCall | Self::CmseNonSecureEntry => {
+// See https://godbolt.org/z/9jhdeqErv. The CMSE calling conventions clear registers
+// before returning, and hence cannot guarantee a tail call.
+false
+}
+Self::AvrInterrupt
+ | Self::AvrNonBlockingInterrupt
+ | Self::Msp430Interrupt
+ | Self::RiscvInterruptM
+ | Self::RiscvInterruptS
+ | Self::X86Interrupt => {
+// See https://godbolt.org/z/Edfjnxxcq. Interrupts cannot be called directly.
+false
+}
+Self::GpuKernel | Self::PtxKernel => {
+// See https://godbolt.org/z/jq5TE5jK1.
+false
+}
+Self::Custom => {
+// This ABI does not support calls at all (except via assembly).
+false
+}
+Self::C{ .. }
+ | Self::System{ .. }
+ | Self::Rust
+ | Self::RustCall
+ | Self::RustCold
+ | Self::RustInvalid
+ | Self::Unadjusted
+ | Self::EfiApi
+ | Self::Aapcs{ .. }
+ | Self::Cdecl{ .. }
+ | Self::Stdcall{ .. }
+ | Self::Fastcall{ .. }
+ | Self::Thiscall{ .. }
+ | Self::Vectorcall{ .. }
+ | Self::SysV64{ .. }
+ | Self::Win64{ .. } => true,
+}
+}
 }
 
 pubfnall_names() -> Vec<&'staticstr>{

compiler/rustc_ast_lowering/src/expr.rs

@@ -1929,7 +1929,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
 /// ControlFlow::Break(residual) =>
 /// #[allow(unreachable_code)]
 /// // If there is an enclosing `try {...}`:
-/// break 'catch_target Try::from_residual(residual),
+/// break 'catch_target Residual::into_try_type(residual),
 /// // Otherwise:
 /// return Try::from_residual(residual),
 /// }
@@ -1979,7 +1979,11 @@ impl<'hir> LoweringContext<'_, 'hir> {
 let(residual_local, residual_local_nid) = self.pat_ident(try_span, residual_ident);
 let residual_expr = self.expr_ident_mut(try_span, residual_ident, residual_local_nid);
 let from_residual_expr = self.wrap_in_try_constructor(
- hir::LangItem::TryTraitFromResidual,
+ifself.catch_scope.is_some(){
+ hir::LangItem::ResidualIntoTryType
+}else{
+ hir::LangItem::TryTraitFromResidual
+},
  try_span,
 self.arena.alloc(residual_expr),
  unstable_span,

compiler/rustc_ast_lowering/src/lib.rs

@@ -183,7 +183,12 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
 impl_trait_defs:Vec::new(),
 impl_trait_bounds:Vec::new(),
 allow_contracts:[sym::contracts_internals].into(),
-allow_try_trait:[sym::try_trait_v2, sym::yeet_desugar_details].into(),
+allow_try_trait:[
+ sym::try_trait_v2,
+ sym::try_trait_v2_residual,
+ sym::yeet_desugar_details,
+]
+.into(),
 allow_pattern_type:[sym::pattern_types, sym::pattern_type_range_trait].into(),
 allow_gen_future:if tcx.features().async_fn_track_caller(){
 [sym::gen_future, sym::closure_track_caller].into()

compiler/rustc_codegen_llvm/src/back/write.rs

@@ -683,7 +683,7 @@ pub(crate) unsafe fn llvm_optimize(
 // Here we map the old arguments to the new arguments, with an offset of 1 to make sure
 // that we don't use the newly added `%dyn_ptr`.
 unsafe{
- llvm::LLVMRustOffloadMapper(cx.llmod(),old_fn, new_fn);
+ llvm::LLVMRustOffloadMapper(old_fn, new_fn);
 }
 
  llvm::set_linkage(new_fn, llvm::get_linkage(old_fn));