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[HLSL][SPIR-V] Fix LinkageAttribute emission for BuiltIn #144701

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Merged
merged 1 commit into from
Jun 18, 2025
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[HLSL][SPIR-V] Fix LinkageAttribute emission for BuiltIn #144701

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1 change: 1 addition & 0 deletions clang/lib/CodeGen/CGHLSLRuntime.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -375,6 +375,7 @@ static llvm::Value *createSPIRVBuiltinLoad(IRBuilder<> &B, llvm::Module &M,
llvm::GlobalVariable::GeneralDynamicTLSModel,
/* AddressSpace */ 7, /* isExternallyInitialized= */ true);
addSPIRVBuiltinDecoration(GV, BuiltInID);
GV->setVisibility(llvm::GlobalValue::HiddenVisibility);
return B.CreateLoad(Ty, GV);
}

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2 changes: 1 addition & 1 deletion clang/test/CodeGenHLSL/semantics/SV_Position.ps.hlsl
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@@ -1,6 +1,6 @@
// RUN: %clang_cc1 -triple spirv-unknown-vulkan1.3-pixel -x hlsl -emit-llvm -finclude-default-header -disable-llvm-passes -o - %s | FileCheck %s

// CHECK: @sv_position = external thread_local addrspace(7) externally_initialized constant <4 x float>, !spirv.Decorations !0
// CHECK: @sv_position = external hidden thread_local addrspace(7) externally_initialized constant <4 x float>, !spirv.Decorations !0

// CHECK: define void @main() {{.*}} {
float4 main(float4 p : SV_Position) {
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23 changes: 23 additions & 0 deletions llvm/test/CodeGen/SPIRV/linkage/link-attribute-vk.ll
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@@ -0,0 +1,23 @@
; RUN: llc -verify-machineinstrs -O0 -mtriple=spirv-unknown-vulkan1.3-pixel %s -o - | FileCheck %s
; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv-unknown-vulkan1.3-pixel %s -o - -filetype=obj | spirv-val --target-env vulkan1.3 %}

@sv_position = external hidden thread_local local_unnamed_addr addrspace(7) externally_initialized constant <4 x float>, !spirv.Decorations !0

; CHECK-NOT: OpDecorate %[[#var]] LinkageAttributes "sv_position" Import

; CHECK-DAG: %[[#float:]] = OpTypeFloat 32
; CHECK-DAG: %[[#float4:]] = OpTypeVector %[[#float]]
; CHECK-DAG: %[[#type:]] = OpTypePointer Input %[[#float4]]
; CHECK-DAG: %[[#var:]] = OpVariable %[[#type]] Input

; CHECK-NOT: OpDecorate %[[#var]] LinkageAttributes "sv_position" Import

define void @main() #1 {
entry:
ret void
}

attributes #1 = { "hlsl.shader"="pixel" }

!0 = !{!1}
!1 = !{i32 11, i32 0}
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