Add a Few Codegen Tests

Author: veera-sivarajan

tests/codegen/issues/issue-64219-fn-ptr-call-returning-never-is-noreturn.rs

@@ -0,0 +1,19 @@
+//! Test for https://github.com/rust-lang/rust/issues/64219
+//! Check if `noreturn` attribute is applied on calls to
+//! function pointers returning `!` (never type).
+
+#![crate_type = "lib"]
+
+extern"C"{
+staticFOO:fn() -> !;
+}
+
+// CHECK-LABEL: @foo
+#[no_mangle]
+pubunsafefnfoo(){
+// CHECK: call
+// CHECK-SAME: [[NUM:#[0-9]+$]]
+FOO();
+}
+
+// CHECK: attributes [[NUM]] = {{{.*}} noreturn {{.*}}}

tests/codegen/issues/issue-86109-eliminate-div-by-zero-check.rs

@@ -0,0 +1,26 @@
+//@ compile-flags: -O
+//! Test for https://github.com/rust-lang/rust/issues/86109
+//! Check LLVM can eliminate the impossible division by zero check by
+//! ensuring there is no call (to panic) instruction.
+//!
+//! This has been fixed since `rustc 1.70.0`.
+
+#![crate_type = "lib"]
+
+typeT = i16;
+
+// CHECK-LABEL: @foo
+#[no_mangle]
+pubfnfoo(start:T) -> T{
+// CHECK-NOT: panic
+if start <= 0{
+return0;
+}
+letmut count = 0;
+for i in start..10_000{
+if752 % i != 0{
+ count += 1;
+}
+}
+ count
+}