Recurisve intrinsics aren't expanded in T0 anymore #104871

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Recurisve intrinsics aren't expanded in T0 anymore#104871
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area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI

Description

@MichalPetryka
MichalPetryka
opened on Jul 14, 2024

Description

Recursive intrinsics aren't expanded in T0 anymore, leaving a call to them instead. They do seem to expand in their bodies though as they don't stackoverflow.
Putting some dumps in the code indicates that mustExpand is false for them now.

; Assembly listing for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier0); Emitting BLENDED_CODE for X64 with AVX512 - Windows; Tier0 code; rbp based frame; partially interruptible; Final local variable assignments;; V00 OutArgs [V00 ] ( 1, 1 ) struct (32) [rsp+0x00] do-not-enreg[XS] addr-exposed "OutgoingArgSpace";; Lcl frame size = 32G_M33356_IG01: ;; offset=0x0000pushrbpsubrsp,32learbp,[rsp+0x20] ;; size=10 bbWeight=1 PerfScore 1.75G_M33356_IG02: ;; offset=0x000Acall[System.Runtime.CompilerServices.RuntimeHelpers:IsReferenceOrContainsReferences[ubyte]():ubyte]nop ;; size=7 bbWeight=1 PerfScore 3.25G_M33356_IG03: ;; offset=0x0011addrsp,32poprbpret ;; size=6 bbWeight=1 PerfScore 1.75; Total bytes of code 23, prolog size 10, PerfScore 6.75, instruction count 8, allocated bytes for code 23 (MethodHash=f8a77db3) for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier0); ============================================================[Boolean IsRef()]: False; Assembly listing for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier1); Emitting BLENDED_CODE for X64 with AVX512 - Windows; Tier1 code; optimized code; rsp based frame; partially interruptible; No PGO data; Final local variable assignments;;# V00 OutArgs [V00 ] ( 1, 1 ) struct ( 0) [rsp+0x00] do-not-enreg[XS] addr-exposed "OutgoingArgSpace";; Lcl frame size = 0G_M33356_IG01: ;; offset=0x0000 ;; size=0 bbWeight=1 PerfScore 0.00G_M33356_IG02: ;; offset=0x0000xoreax,eax ;; size=2 bbWeight=1 PerfScore 0.25G_M33356_IG03: ;; offset=0x0002ret ;; size=1 bbWeight=1 PerfScore 1.00; Total bytes of code 3, prolog size 0, PerfScore 1.25, instruction count 2, allocated bytes for code 3 (MethodHash=f8a77db3) for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier1); ============================================================[Boolean IsRef()]: False

Reproduction Steps

Disasm a method calling any mustExpand intrinsic (any recursive one) like IsReferenceOrContainsReferences.

Expected behavior

It's expanded in T0.

Actual behavior

It's not expanded but seems to be expanded inside of itself as it doesn't stackoverflow.

Regression?

Yes, I assume #99818 caused this cc @EgorBo

Known Workarounds

No response

Configuration

No response

Other information

No response

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      Skip to content
      Recurisve intrinsics aren't expanded in T0 anymore #104871
      Closed
      Closed
      Recurisve intrinsics aren't expanded in T0 anymore#104871
      Labels
      area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
      Description
      @MichalPetryka
      MichalPetryka
      opened on Jul 14, 2024
      Description
      Recursive intrinsics aren't expanded in T0 anymore, leaving a call to them instead. They do seem to expand in their bodies though as they don't stackoverflow.
      
Putting some dumps in the code indicates that mustExpand is false for them now.
      ; Assembly listing for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier0); Emitting BLENDED_CODE for X64 with AVX512 - Windows; Tier0 code; rbp based frame; partially interruptible; Final local variable assignments;; V00 OutArgs [V00 ] ( 1, 1 ) struct (32) [rsp+0x00] do-not-enreg[XS] addr-exposed "OutgoingArgSpace";; Lcl frame size = 32G_M33356_IG01: ;; offset=0x0000pushrbpsubrsp,32learbp,[rsp+0x20] ;; size=10 bbWeight=1 PerfScore 1.75G_M33356_IG02: ;; offset=0x000Acall[System.Runtime.CompilerServices.RuntimeHelpers:IsReferenceOrContainsReferences[ubyte]():ubyte]nop ;; size=7 bbWeight=1 PerfScore 3.25G_M33356_IG03: ;; offset=0x0011addrsp,32poprbpret ;; size=6 bbWeight=1 PerfScore 1.75; Total bytes of code 23, prolog size 10, PerfScore 6.75, instruction count 8, allocated bytes for code 23 (MethodHash=f8a77db3) for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier0); ============================================================[Boolean IsRef()]: False; Assembly listing for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier1); Emitting BLENDED_CODE for X64 with AVX512 - Windows; Tier1 code; optimized code; rsp based frame; partially interruptible; No PGO data; Final local variable assignments;;# V00 OutArgs [V00 ] ( 1, 1 ) struct ( 0) [rsp+0x00] do-not-enreg[XS] addr-exposed "OutgoingArgSpace";; Lcl frame size = 0G_M33356_IG01: ;; offset=0x0000 ;; size=0 bbWeight=1 PerfScore 0.00G_M33356_IG02: ;; offset=0x0000xoreax,eax ;; size=2 bbWeight=1 PerfScore 0.25G_M33356_IG03: ;; offset=0x0002ret ;; size=1 bbWeight=1 PerfScore 1.00; Total bytes of code 3, prolog size 0, PerfScore 1.25, instruction count 2, allocated bytes for code 3 (MethodHash=f8a77db3) for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier1); ============================================================[Boolean IsRef()]: False
      Reproduction Steps
      Disasm a method calling any mustExpand intrinsic (any recursive one) like IsReferenceOrContainsReferences.
      Expected behavior
      It's expanded in T0.
      Actual behavior
      It's not expanded but seems to be expanded inside of itself as it doesn't stackoverflow.
      Regression?
      Yes, I assume #99818 caused this cc @EgorBo
      Known Workarounds
      No response
      Configuration
      No response
      Other information
      No response
      Metadata
      Metadata
      Assignees
      No one assigned
        Labels
        area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
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        No type
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        No projects
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          Relationships
          None yet
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          No branches or pull requests
          Issue actions
          
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          Skip to content
          Recurisve intrinsics aren't expanded in T0 anymore #104871
          Closed
          Closed
          Recurisve intrinsics aren't expanded in T0 anymore#104871
          Labels
          area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
          Description
          @MichalPetryka
          MichalPetryka
          opened on Jul 14, 2024
          Description
          Recursive intrinsics aren't expanded in T0 anymore, leaving a call to them instead. They do seem to expand in their bodies though as they don't stackoverflow.
          
Putting some dumps in the code indicates that mustExpand is false for them now.
          ; Assembly listing for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier0); Emitting BLENDED_CODE for X64 with AVX512 - Windows; Tier0 code; rbp based frame; partially interruptible; Final local variable assignments;; V00 OutArgs [V00 ] ( 1, 1 ) struct (32) [rsp+0x00] do-not-enreg[XS] addr-exposed "OutgoingArgSpace";; Lcl frame size = 32G_M33356_IG01: ;; offset=0x0000pushrbpsubrsp,32learbp,[rsp+0x20] ;; size=10 bbWeight=1 PerfScore 1.75G_M33356_IG02: ;; offset=0x000Acall[System.Runtime.CompilerServices.RuntimeHelpers:IsReferenceOrContainsReferences[ubyte]():ubyte]nop ;; size=7 bbWeight=1 PerfScore 3.25G_M33356_IG03: ;; offset=0x0011addrsp,32poprbpret ;; size=6 bbWeight=1 PerfScore 1.75; Total bytes of code 23, prolog size 10, PerfScore 6.75, instruction count 8, allocated bytes for code 23 (MethodHash=f8a77db3) for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier0); ============================================================[Boolean IsRef()]: False; Assembly listing for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier1); Emitting BLENDED_CODE for X64 with AVX512 - Windows; Tier1 code; optimized code; rsp based frame; partially interruptible; No PGO data; Final local variable assignments;;# V00 OutArgs [V00 ] ( 1, 1 ) struct ( 0) [rsp+0x00] do-not-enreg[XS] addr-exposed "OutgoingArgSpace";; Lcl frame size = 0G_M33356_IG01: ;; offset=0x0000 ;; size=0 bbWeight=1 PerfScore 0.00G_M33356_IG02: ;; offset=0x0000xoreax,eax ;; size=2 bbWeight=1 PerfScore 0.25G_M33356_IG03: ;; offset=0x0002ret ;; size=1 bbWeight=1 PerfScore 1.00; Total bytes of code 3, prolog size 0, PerfScore 1.25, instruction count 2, allocated bytes for code 3 (MethodHash=f8a77db3) for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier1); ============================================================[Boolean IsRef()]: False
          Reproduction Steps
          Disasm a method calling any mustExpand intrinsic (any recursive one) like IsReferenceOrContainsReferences.
          Expected behavior
          It's expanded in T0.
          Actual behavior
          It's not expanded but seems to be expanded inside of itself as it doesn't stackoverflow.
          Regression?
          Yes, I assume #99818 caused this cc @EgorBo
          Known Workarounds
          No response
          Configuration
          No response
          Other information
          No response
          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
            Type
            No type
            Projects
            No projects
              Milestone
              No milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
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              Skip to content
              Recurisve intrinsics aren't expanded in T0 anymore #104871
              Closed
              Closed
              Recurisve intrinsics aren't expanded in T0 anymore#104871
              Labels
              area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
              Description
              @MichalPetryka
              MichalPetryka
              opened on Jul 14, 2024
              Description
              Recursive intrinsics aren't expanded in T0 anymore, leaving a call to them instead. They do seem to expand in their bodies though as they don't stackoverflow.
              
Putting some dumps in the code indicates that mustExpand is false for them now.
              ; Assembly listing for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier0); Emitting BLENDED_CODE for X64 with AVX512 - Windows; Tier0 code; rbp based frame; partially interruptible; Final local variable assignments;; V00 OutArgs [V00 ] ( 1, 1 ) struct (32) [rsp+0x00] do-not-enreg[XS] addr-exposed "OutgoingArgSpace";; Lcl frame size = 32G_M33356_IG01: ;; offset=0x0000pushrbpsubrsp,32learbp,[rsp+0x20] ;; size=10 bbWeight=1 PerfScore 1.75G_M33356_IG02: ;; offset=0x000Acall[System.Runtime.CompilerServices.RuntimeHelpers:IsReferenceOrContainsReferences[ubyte]():ubyte]nop ;; size=7 bbWeight=1 PerfScore 3.25G_M33356_IG03: ;; offset=0x0011addrsp,32poprbpret ;; size=6 bbWeight=1 PerfScore 1.75; Total bytes of code 23, prolog size 10, PerfScore 6.75, instruction count 8, allocated bytes for code 23 (MethodHash=f8a77db3) for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier0); ============================================================[Boolean IsRef()]: False; Assembly listing for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier1); Emitting BLENDED_CODE for X64 with AVX512 - Windows; Tier1 code; optimized code; rsp based frame; partially interruptible; No PGO data; Final local variable assignments;;# V00 OutArgs [V00 ] ( 1, 1 ) struct ( 0) [rsp+0x00] do-not-enreg[XS] addr-exposed "OutgoingArgSpace";; Lcl frame size = 0G_M33356_IG01: ;; offset=0x0000 ;; size=0 bbWeight=1 PerfScore 0.00G_M33356_IG02: ;; offset=0x0000xoreax,eax ;; size=2 bbWeight=1 PerfScore 0.25G_M33356_IG03: ;; offset=0x0002ret ;; size=1 bbWeight=1 PerfScore 1.00; Total bytes of code 3, prolog size 0, PerfScore 1.25, instruction count 2, allocated bytes for code 3 (MethodHash=f8a77db3) for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier1); ============================================================[Boolean IsRef()]: False
              Reproduction Steps
              Disasm a method calling any mustExpand intrinsic (any recursive one) like IsReferenceOrContainsReferences.
              Expected behavior
              It's expanded in T0.
              Actual behavior
              It's not expanded but seems to be expanded inside of itself as it doesn't stackoverflow.
              Regression?
              Yes, I assume #99818 caused this cc @EgorBo
              Known Workarounds
              No response
              Configuration
              No response
              Other information
              No response
              Metadata
              Metadata
              Assignees
              No one assigned
                Labels
                area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
                Type
                No type
                Projects
                No projects
                  Milestone
                  No milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions
                  
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                  Skip to content
                  Recurisve intrinsics aren't expanded in T0 anymore #104871
                  Closed
                  Closed
                  Recurisve intrinsics aren't expanded in T0 anymore#104871
                  Labels
                  area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
                  Description
                  @MichalPetryka
                  MichalPetryka
                  opened on Jul 14, 2024
                  Description
                  Recursive intrinsics aren't expanded in T0 anymore, leaving a call to them instead. They do seem to expand in their bodies though as they don't stackoverflow.
                  
Putting some dumps in the code indicates that mustExpand is false for them now.
                  ; Assembly listing for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier0); Emitting BLENDED_CODE for X64 with AVX512 - Windows; Tier0 code; rbp based frame; partially interruptible; Final local variable assignments;; V00 OutArgs [V00 ] ( 1, 1 ) struct (32) [rsp+0x00] do-not-enreg[XS] addr-exposed "OutgoingArgSpace";; Lcl frame size = 32G_M33356_IG01: ;; offset=0x0000pushrbpsubrsp,32learbp,[rsp+0x20] ;; size=10 bbWeight=1 PerfScore 1.75G_M33356_IG02: ;; offset=0x000Acall[System.Runtime.CompilerServices.RuntimeHelpers:IsReferenceOrContainsReferences[ubyte]():ubyte]nop ;; size=7 bbWeight=1 PerfScore 3.25G_M33356_IG03: ;; offset=0x0011addrsp,32poprbpret ;; size=6 bbWeight=1 PerfScore 1.75; Total bytes of code 23, prolog size 10, PerfScore 6.75, instruction count 8, allocated bytes for code 23 (MethodHash=f8a77db3) for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier0); ============================================================[Boolean IsRef()]: False; Assembly listing for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier1); Emitting BLENDED_CODE for X64 with AVX512 - Windows; Tier1 code; optimized code; rsp based frame; partially interruptible; No PGO data; Final local variable assignments;;# V00 OutArgs [V00 ] ( 1, 1 ) struct ( 0) [rsp+0x00] do-not-enreg[XS] addr-exposed "OutgoingArgSpace";; Lcl frame size = 0G_M33356_IG01: ;; offset=0x0000 ;; size=0 bbWeight=1 PerfScore 0.00G_M33356_IG02: ;; offset=0x0000xoreax,eax ;; size=2 bbWeight=1 PerfScore 0.25G_M33356_IG03: ;; offset=0x0002ret ;; size=1 bbWeight=1 PerfScore 1.00; Total bytes of code 3, prolog size 0, PerfScore 1.25, instruction count 2, allocated bytes for code 3 (MethodHash=f8a77db3) for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier1); ============================================================[Boolean IsRef()]: False
                  Reproduction Steps
                  Disasm a method calling any mustExpand intrinsic (any recursive one) like IsReferenceOrContainsReferences.
                  Expected behavior
                  It's expanded in T0.
                  Actual behavior
                  It's not expanded but seems to be expanded inside of itself as it doesn't stackoverflow.
                  Regression?
                  Yes, I assume #99818 caused this cc @EgorBo
                  Known Workarounds
                  No response
                  Configuration
                  No response
                  Other information
                  No response
                  Metadata
                  Metadata
                  Assignees
                  No one assigned
                    Labels
                    area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
                    Type
                    No type
                    Projects
                    No projects
                      Milestone
                      No milestone
                      Relationships
                      None yet
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                      No branches or pull requests
                      Issue actions
                      
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(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

                      Skip to content
                      Recurisve intrinsics aren't expanded in T0 anymore #104871
                      Closed
                      Closed
                      Recurisve intrinsics aren't expanded in T0 anymore#104871
                      Labels
                      area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
                      Description
                      @MichalPetryka
                      MichalPetryka
                      opened on Jul 14, 2024
                      Description
                      Recursive intrinsics aren't expanded in T0 anymore, leaving a call to them instead. They do seem to expand in their bodies though as they don't stackoverflow.
                      
Putting some dumps in the code indicates that mustExpand is false for them now.
                      ; Assembly listing for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier0); Emitting BLENDED_CODE for X64 with AVX512 - Windows; Tier0 code; rbp based frame; partially interruptible; Final local variable assignments;; V00 OutArgs [V00 ] ( 1, 1 ) struct (32) [rsp+0x00] do-not-enreg[XS] addr-exposed "OutgoingArgSpace";; Lcl frame size = 32G_M33356_IG01: ;; offset=0x0000pushrbpsubrsp,32learbp,[rsp+0x20] ;; size=10 bbWeight=1 PerfScore 1.75G_M33356_IG02: ;; offset=0x000Acall[System.Runtime.CompilerServices.RuntimeHelpers:IsReferenceOrContainsReferences[ubyte]():ubyte]nop ;; size=7 bbWeight=1 PerfScore 3.25G_M33356_IG03: ;; offset=0x0011addrsp,32poprbpret ;; size=6 bbWeight=1 PerfScore 1.75; Total bytes of code 23, prolog size 10, PerfScore 6.75, instruction count 8, allocated bytes for code 23 (MethodHash=f8a77db3) for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier0); ============================================================[Boolean IsRef()]: False; Assembly listing for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier1); Emitting BLENDED_CODE for X64 with AVX512 - Windows; Tier1 code; optimized code; rsp based frame; partially interruptible; No PGO data; Final local variable assignments;;# V00 OutArgs [V00 ] ( 1, 1 ) struct ( 0) [rsp+0x00] do-not-enreg[XS] addr-exposed "OutgoingArgSpace";; Lcl frame size = 0G_M33356_IG01: ;; offset=0x0000 ;; size=0 bbWeight=1 PerfScore 0.00G_M33356_IG02: ;; offset=0x0000xoreax,eax ;; size=2 bbWeight=1 PerfScore 0.25G_M33356_IG03: ;; offset=0x0002ret ;; size=1 bbWeight=1 PerfScore 1.00; Total bytes of code 3, prolog size 0, PerfScore 1.25, instruction count 2, allocated bytes for code 3 (MethodHash=f8a77db3) for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier1); ============================================================[Boolean IsRef()]: False
                      Reproduction Steps
                      Disasm a method calling any mustExpand intrinsic (any recursive one) like IsReferenceOrContainsReferences.
                      Expected behavior
                      It's expanded in T0.
                      Actual behavior
                      It's not expanded but seems to be expanded inside of itself as it doesn't stackoverflow.
                      Regression?
                      Yes, I assume #99818 caused this cc @EgorBo
                      Known Workarounds
                      No response
                      Configuration
                      No response
                      Other information
                      No response
                      Metadata
                      Metadata
                      Assignees
                      No one assigned
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                          Skip to content
                          Recurisve intrinsics aren't expanded in T0 anymore #104871
                          Closed
                          Closed
                          Recurisve intrinsics aren't expanded in T0 anymore#104871
                          Labels
                          area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
                          Description
                          @MichalPetryka
                          MichalPetryka
                          opened on Jul 14, 2024
                          Description
                          Recursive intrinsics aren't expanded in T0 anymore, leaving a call to them instead. They do seem to expand in their bodies though as they don't stackoverflow.
                          
Putting some dumps in the code indicates that mustExpand is false for them now.
                          ; Assembly listing for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier0); Emitting BLENDED_CODE for X64 with AVX512 - Windows; Tier0 code; rbp based frame; partially interruptible; Final local variable assignments;; V00 OutArgs [V00 ] ( 1, 1 ) struct (32) [rsp+0x00] do-not-enreg[XS] addr-exposed "OutgoingArgSpace";; Lcl frame size = 32G_M33356_IG01: ;; offset=0x0000pushrbpsubrsp,32learbp,[rsp+0x20] ;; size=10 bbWeight=1 PerfScore 1.75G_M33356_IG02: ;; offset=0x000Acall[System.Runtime.CompilerServices.RuntimeHelpers:IsReferenceOrContainsReferences[ubyte]():ubyte]nop ;; size=7 bbWeight=1 PerfScore 3.25G_M33356_IG03: ;; offset=0x0011addrsp,32poprbpret ;; size=6 bbWeight=1 PerfScore 1.75; Total bytes of code 23, prolog size 10, PerfScore 6.75, instruction count 8, allocated bytes for code 23 (MethodHash=f8a77db3) for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier0); ============================================================[Boolean IsRef()]: False; Assembly listing for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier1); Emitting BLENDED_CODE for X64 with AVX512 - Windows; Tier1 code; optimized code; rsp based frame; partially interruptible; No PGO data; Final local variable assignments;;# V00 OutArgs [V00 ] ( 1, 1 ) struct ( 0) [rsp+0x00] do-not-enreg[XS] addr-exposed "OutgoingArgSpace";; Lcl frame size = 0G_M33356_IG01: ;; offset=0x0000 ;; size=0 bbWeight=1 PerfScore 0.00G_M33356_IG02: ;; offset=0x0000xoreax,eax ;; size=2 bbWeight=1 PerfScore 0.25G_M33356_IG03: ;; offset=0x0002ret ;; size=1 bbWeight=1 PerfScore 1.00; Total bytes of code 3, prolog size 0, PerfScore 1.25, instruction count 2, allocated bytes for code 3 (MethodHash=f8a77db3) for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier1); ============================================================[Boolean IsRef()]: False
                          Reproduction Steps
                          Disasm a method calling any mustExpand intrinsic (any recursive one) like IsReferenceOrContainsReferences.
                          Expected behavior
                          It's expanded in T0.
                          Actual behavior
                          It's not expanded but seems to be expanded inside of itself as it doesn't stackoverflow.
                          Regression?
                          Yes, I assume #99818 caused this cc @EgorBo
                          Known Workarounds
                          No response
                          Configuration
                          No response
                          Other information
                          No response
                          Metadata
                          Metadata
                          Assignees
                          No one assigned
                            Labels
                            area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
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filter: invert(1) hue-rotate(180deg) !important;
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})();
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                              Skip to content
                              Recurisve intrinsics aren't expanded in T0 anymore #104871
                              Closed
                              Closed
                              Recurisve intrinsics aren't expanded in T0 anymore#104871
                              Labels
                              area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
                              Description
                              @MichalPetryka
                              MichalPetryka
                              opened on Jul 14, 2024
                              Description
                              Recursive intrinsics aren't expanded in T0 anymore, leaving a call to them instead. They do seem to expand in their bodies though as they don't stackoverflow.
                              
Putting some dumps in the code indicates that mustExpand is false for them now.
                              ; Assembly listing for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier0); Emitting BLENDED_CODE for X64 with AVX512 - Windows; Tier0 code; rbp based frame; partially interruptible; Final local variable assignments;; V00 OutArgs [V00 ] ( 1, 1 ) struct (32) [rsp+0x00] do-not-enreg[XS] addr-exposed "OutgoingArgSpace";; Lcl frame size = 32G_M33356_IG01: ;; offset=0x0000pushrbpsubrsp,32learbp,[rsp+0x20] ;; size=10 bbWeight=1 PerfScore 1.75G_M33356_IG02: ;; offset=0x000Acall[System.Runtime.CompilerServices.RuntimeHelpers:IsReferenceOrContainsReferences[ubyte]():ubyte]nop ;; size=7 bbWeight=1 PerfScore 3.25G_M33356_IG03: ;; offset=0x0011addrsp,32poprbpret ;; size=6 bbWeight=1 PerfScore 1.75; Total bytes of code 23, prolog size 10, PerfScore 6.75, instruction count 8, allocated bytes for code 23 (MethodHash=f8a77db3) for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier0); ============================================================[Boolean IsRef()]: False; Assembly listing for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier1); Emitting BLENDED_CODE for X64 with AVX512 - Windows; Tier1 code; optimized code; rsp based frame; partially interruptible; No PGO data; Final local variable assignments;;# V00 OutArgs [V00 ] ( 1, 1 ) struct ( 0) [rsp+0x00] do-not-enreg[XS] addr-exposed "OutgoingArgSpace";; Lcl frame size = 0G_M33356_IG01: ;; offset=0x0000 ;; size=0 bbWeight=1 PerfScore 0.00G_M33356_IG02: ;; offset=0x0000xoreax,eax ;; size=2 bbWeight=1 PerfScore 0.25G_M33356_IG03: ;; offset=0x0002ret ;; size=1 bbWeight=1 PerfScore 1.00; Total bytes of code 3, prolog size 0, PerfScore 1.25, instruction count 2, allocated bytes for code 3 (MethodHash=f8a77db3) for method DisasmoPlayground.Disasms.EqualsDisasm:IsRef():ubyte (Tier1); ============================================================[Boolean IsRef()]: False
                              Reproduction Steps
                              Disasm a method calling any mustExpand intrinsic (any recursive one) like IsReferenceOrContainsReferences.
                              Expected behavior
                              It's expanded in T0.
                              Actual behavior
                              It's not expanded but seems to be expanded inside of itself as it doesn't stackoverflow.
                              Regression?
                              Yes, I assume #99818 caused this cc @EgorBo
                              Known Workarounds
                              No response
                              Configuration
                              No response
                              Other information
                              No response
                              Metadata
                              Metadata
                              Assignees
                              No one assigned
                                Labels
                                area-CodeGen-coreclrCLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
                                Type
                                No type
                                Projects
                                No projects
                                  Milestone
                                  No milestone
                                  Relationships
                                  None yet
                                  Development
                                  No branches or pull requests
                                  Issue actions