[llvm] [HLSL][SPIR-V] Add SV_DispatchThreadID semantic support (PR #82536)

[Michal Paszkowski via llvm-commits]

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@@ -0,0 +1,76 @@
+; RUN: llc -O0 -mtriple=spirv-vulkan-unknown %s -o - | FileCheck %s
+; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv-vulkan-unknown %s -o - -filetype=obj | spirv-val %}
+
+; This file generated from the following HLSL:
+; clang -cc1 -triple spirv-vulkan-library -x hlsl -emit-llvm -disable-llvm-passes -finclude-default-header -o - DispatchThreadID.hlsl
+;
+; [shader("compute")]
+; [numthreads(1,1,1)]
+; void main(uint3 ID : SV_DispatchThreadID) {}
+
+; CHECK-DAG:        %[[#int:]] = OpTypeInt 32 0
+; CHECK-DAG:        %[[#v3int:]] = OpTypeVector %[[#int]] 3
+; CHECK-DAG:        %[[#ptr_Input_v3int:]] = OpTypePointer Input %[[#v3int]]
+; CHECK-DAG:        %[[#tempvar:]] = OpUndef %[[#v3int]]
+; CHECK-DAG:        %[[#GlobalInvocationId:]] = OpVariable %[[#ptr_Input_v3int]] Input
+
+; CHECK-DAG:        OpEntryPoint GLCompute {{.*}} %[[#GlobalInvocationId]]
+; CHECK-DAG:        OpName %[[#GlobalInvocationId]] "__spirv_BuiltInGlobalInvocationId"
+; CHECK-DAG:        OpDecorate %[[#GlobalInvocationId]] LinkageAttributes "__spirv_BuiltInGlobalInvocationId" Import
+; CHECK-DAG:        OpDecorate %[[#GlobalInvocationId]] BuiltIn GlobalInvocationId
+
+; ModuleID = 'DispatchThreadID.hlsl'
+source_filename = "DispatchThreadID.hlsl"
+target datalayout = "e-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024"
+target triple = "spirv-unknown-vulkan-library"
+
+; Function Attrs: noinline norecurse nounwind optnone
+define internal spir_func void @main(<3 x i32> noundef %ID) #0 {
+entry:
+  %ID.addr = alloca <3 x i32>, align 16
+  store <3 x i32> %ID, ptr %ID.addr, align 16
+  ret void
+}
+
+; Function Attrs: norecurse
+define void @main.1() #1 {
+entry:
+
+; CHECK:        %[[#load:]] = OpLoad %[[#v3int]] %[[#GlobalInvocationId]]
+; CHECK:        %[[#load0:]] = OpCompositeExtract %[[#int]] %[[#load]] 0
+  %0 = call i32 @llvm.dx.thread.id(i32 0)
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michalpaszkowski wrote:

Quick comment: Please use named virtual registers in LIT tests

https://github.com/llvm/llvm-project/pull/82536