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[AMDGPU] Do not emit V_DOT2C_F32_F16_e32
on GFX12
#78709
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That instruction is not supported on GFX12. Added a testcase which previously crashed without this change.
llvmbot
added
clang
Clang issues not falling into any other category
backend:AMDGPU
labels
Jan 19, 2024
@llvm/pr-subscribers-backend-amdgpu @llvm/pr-subscribers-clang Author: Jay Foad (jayfoad) ChangesThat instruction is not supported on GFX12. Full diff: https://github.com/llvm/llvm-project/pull/78709.diff 4 Files Affected:
diff --git a/clang/test/CodeGenOpenCL/amdgpu-features.cl b/clang/test/CodeGenOpenCL/amdgpu-features.cl
index 7495bca72a9df5..1ba2b129f6895a 100644
--- a/clang/test/CodeGenOpenCL/amdgpu-features.cl
+++ b/clang/test/CodeGenOpenCL/amdgpu-features.cl
@@ -100,8 +100,8 @@
// GFX1103: "target-features"="+16-bit-insts,+atomic-fadd-rtn-insts,+ci-insts,+dl-insts,+dot10-insts,+dot5-insts,+dot7-insts,+dot8-insts,+dot9-insts,+dpp,+gfx10-3-insts,+gfx10-insts,+gfx11-insts,+gfx8-insts,+gfx9-insts,+wavefrontsize32"
// GFX1150: "target-features"="+16-bit-insts,+atomic-fadd-rtn-insts,+ci-insts,+dl-insts,+dot10-insts,+dot5-insts,+dot7-insts,+dot8-insts,+dot9-insts,+dpp,+gfx10-3-insts,+gfx10-insts,+gfx11-insts,+gfx8-insts,+gfx9-insts,+wavefrontsize32"
// GFX1151: "target-features"="+16-bit-insts,+atomic-fadd-rtn-insts,+ci-insts,+dl-insts,+dot10-insts,+dot5-insts,+dot7-insts,+dot8-insts,+dot9-insts,+dpp,+gfx10-3-insts,+gfx10-insts,+gfx11-insts,+gfx8-insts,+gfx9-insts,+wavefrontsize32"
-// GFX1200: "target-features"="+16-bit-insts,+atomic-buffer-global-pk-add-f16-insts,+atomic-ds-pk-add-16-insts,+atomic-fadd-rtn-insts,+atomic-flat-pk-add-16-insts,+atomic-global-pk-add-bf16-inst,+ci-insts,+dl-insts,+dot10-insts,+dot5-insts,+dot7-insts,+dot8-insts,+dot9-insts,+dpp,+gfx10-3-insts,+gfx10-insts,+gfx11-insts,+gfx12-insts,+gfx8-insts,+gfx9-insts,+wavefrontsize32"
-// GFX1201: "target-features"="+16-bit-insts,+atomic-buffer-global-pk-add-f16-insts,+atomic-ds-pk-add-16-insts,+atomic-fadd-rtn-insts,+atomic-flat-pk-add-16-insts,+atomic-global-pk-add-bf16-inst,+ci-insts,+dl-insts,+dot10-insts,+dot5-insts,+dot7-insts,+dot8-insts,+dot9-insts,+dpp,+gfx10-3-insts,+gfx10-insts,+gfx11-insts,+gfx12-insts,+gfx8-insts,+gfx9-insts,+wavefrontsize32"
+// GFX1200: "target-features"="+16-bit-insts,+atomic-buffer-global-pk-add-f16-insts,+atomic-ds-pk-add-16-insts,+atomic-fadd-rtn-insts,+atomic-flat-pk-add-16-insts,+atomic-global-pk-add-bf16-inst,+ci-insts,+dl-insts,+dot10-insts,+dot7-insts,+dot8-insts,+dot9-insts,+dpp,+gfx10-3-insts,+gfx10-insts,+gfx11-insts,+gfx12-insts,+gfx8-insts,+gfx9-insts,+wavefrontsize32"
+// GFX1201: "target-features"="+16-bit-insts,+atomic-buffer-global-pk-add-f16-insts,+atomic-ds-pk-add-16-insts,+atomic-fadd-rtn-insts,+atomic-flat-pk-add-16-insts,+atomic-global-pk-add-bf16-inst,+ci-insts,+dl-insts,+dot10-insts,+dot7-insts,+dot8-insts,+dot9-insts,+dpp,+gfx10-3-insts,+gfx10-insts,+gfx11-insts,+gfx12-insts,+gfx8-insts,+gfx9-insts,+wavefrontsize32"
// GFX1103-W64: "target-features"="+16-bit-insts,+atomic-fadd-rtn-insts,+ci-insts,+dl-insts,+dot10-insts,+dot5-insts,+dot7-insts,+dot8-insts,+dot9-insts,+dpp,+gfx10-3-insts,+gfx10-insts,+gfx11-insts,+gfx8-insts,+gfx9-insts,+wavefrontsize64"
diff --git a/llvm/lib/Target/AMDGPU/AMDGPU.td b/llvm/lib/Target/AMDGPU/AMDGPU.td
index 7b7fa906b2b1a3..92985f971f17a7 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPU.td
+++ b/llvm/lib/Target/AMDGPU/AMDGPU.td
@@ -1487,7 +1487,6 @@ def FeatureISAVersion12 : FeatureSet<
[FeatureGFX12,
FeatureLDSBankCount32,
FeatureDLInsts,
- FeatureDot5Insts,
FeatureDot7Insts,
FeatureDot8Insts,
FeatureDot9Insts,
diff --git a/llvm/lib/TargetParser/TargetParser.cpp b/llvm/lib/TargetParser/TargetParser.cpp
index 2cfe23676d20f8..f6d5bfe913b419 100644
--- a/llvm/lib/TargetParser/TargetParser.cpp
+++ b/llvm/lib/TargetParser/TargetParser.cpp
@@ -275,7 +275,6 @@ void AMDGPU::fillAMDGPUFeatureMap(StringRef GPU, const Triple &T,
case GK_GFX1201:
case GK_GFX1200:
Features["ci-insts"] = true;
- Features["dot5-insts"] = true;
Features["dot7-insts"] = true;
Features["dot8-insts"] = true;
Features["dot9-insts"] = true;
diff --git a/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.fdot2.ll b/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.fdot2.ll
index 240997aeb9a687..26e6bde97f499d 100644
--- a/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.fdot2.ll
+++ b/llvm/test/CodeGen/AMDGPU/llvm.amdgcn.fdot2.ll
@@ -3,12 +3,14 @@
; RUN: llc -mtriple=amdgcn -mcpu=gfx1011 -verify-machineinstrs < %s | FileCheck %s --check-prefixes=GCN,GFX10
; RUN: llc -mtriple=amdgcn -mcpu=gfx1012 -verify-machineinstrs < %s | FileCheck %s --check-prefixes=GCN,GFX10
; RUN: llc -mtriple=amdgcn -mcpu=gfx1100 -amdgpu-enable-vopd=0 -verify-machineinstrs < %s | FileCheck %s --check-prefixes=GCN,GFX10
+; RUN: llc -mtriple=amdgcn -mcpu=gfx1200 -amdgpu-enable-vopd=0 -verify-machineinstrs < %s | FileCheck %s --check-prefixes=GCN,GFX12
declare float @llvm.amdgcn.fdot2(<2 x half> %a, <2 x half> %b, float %c, i1 %clamp)
; GCN-LABEL: {{^}}test_llvm_amdgcn_fdot2_clamp
; GFX9: v_dot2_f32_f16 v{{[0-9]+}}, s{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}} clamp{{$}}
; GFX10: v_dot2_f32_f16 v{{[0-9]+}}, s{{[0-9]+}}, s{{[0-9]+}}, v{{[0-9]+}} clamp{{$}}
+; GFX12: v_dot2_f32_f16 v{{[0-9]+}}, s{{[0-9]+}}, s{{[0-9]+}}, v{{[0-9]+}} clamp{{$}}
define amdgpu_kernel void @test_llvm_amdgcn_fdot2_clamp(
ptr addrspace(1) %r,
ptr addrspace(1) %a,
@@ -27,6 +29,7 @@ entry:
; GFX906: v_dot2_f32_f16 v{{[0-9]+}}, s{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}{{$}}
; GFX940: v_dot2c_f32_f16_e32 v{{[0-9]+}}, s{{[0-9]+}}, v{{[0-9]+}}{{$}}
; GFX10: {{v_dot2c_f32_f16|v_dot2acc_f32_f16}} v{{[0-9]+}}, s{{[0-9]+}}, v{{[0-9]+}}{{$}}
+; GFX12: v_dot2_f32_f16 v{{[0-9]+}}, s{{[0-9]+}}, s{{[0-9]+}}, v{{[0-9]+}}{{$}}
define amdgpu_kernel void @test_llvm_amdgcn_fdot2_no_clamp(
ptr addrspace(1) %r,
ptr addrspace(1) %a,
@@ -44,6 +47,7 @@ entry:
; GFX9-LABEL: {{^}}fdot2_inline_literal
; GFX906: v_dot2_f32_f16 v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}, 1.0
; GFX940: v_dot2c_f32_f16_e32 v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}{{$}}
+; GFX12: v_dot2_f32_f16 v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}, 1.0{{$}}
define float @fdot2_inline_literal(<2 x half> %a, <2 x half> %b) {
%ret = tail call float @llvm.amdgcn.fdot2(<2 x half> %a, <2 x half> %b, float 1.0, i1 false)
ret float %ret
|
jayfoad
requested review from
arsenm,
rampitec,
Pierre-vh,
piotrAMD,
mbrkusanin and
mariusz-sikora-at-amd
January 19, 2024 12:50
mbrkusanin
approved these changes
Jan 19, 2024
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That instruction is not supported on GFX12.
Added a testcase which previously crashed without this change.