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1// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-compute -emit-llvm -o - -disable-llvm-passes %s | \2// RUN: llvm-cxxfilt | FileCheck %s3 4// Verify that no per variable _Init_thread instructions are emitted for non-trivial static locals5// These would normally be emitted by the MicrosoftCXXABI, but the DirectX backend should exlude them6// Instead, check for the guardvar operations that should protect the constructor initialization should7// only take place once.8 9RWBuffer<int> buf[10];10 11// CHECK: @[[main_mybuf:.*]] = internal global %"class.hlsl::RWBuffer" zeroinitializer, align 412// CHECK: @[[main_mybuf_guard:.*]] = internal global i8 0, align 113 14void InitBuf(RWBuffer<int> buf) {15 for (unsigned int i = 0; i < 100; i++)16 buf[i] = 0;17}18 19// CHECK-NOT: _Init_thread_epoch20// CHECK: define internal void @main21// CHECK-NEXT: entry:22// CHECK-NEXT: [[Tmp0:%.*]] = alloca %"class.hlsl::RWBuffer"23// CHECK-NEXT: [[Tmp1:%.*]] = alloca %"class.hlsl::RWBuffer"24// CHECK-NEXT: [[Tmp2:%.*]] = load i8, ptr @guard variable for main()::mybuf25// CHECK-NEXT: [[Tmp3:%.*]] = icmp eq i8 [[Tmp2]], 026// CHECK-NEXT: br i1 [[Tmp3]]27// CHECK-NOT: _Init_thread_header28// CHECK: init.check:29// CHECK-NEXT: call void @hlsl::RWBuffer<int>::__createFromImplicitBinding30// CHECK-NEXT: call void @hlsl::RWBuffer<int>::RWBuffer(hlsl::RWBuffer<int> const&)(ptr {{.*}} @main()::mybuf, ptr {{.*}}) #31// CHECK-NEXT: store i8 1, ptr @guard variable for main()::mybuf32// CHECK-NOT: _Init_thread_footer33 34[shader("compute")]35[numthreads(1,1,1)]36void main() {37 // A non-trivially constructed static local will get checks to verify that it is generated just once38 static RWBuffer<int> mybuf = buf[0];39 InitBuf(mybuf);40}41