| // RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-compute -emit-llvm -o - -disable-llvm-passes %s | FileCheck %s |
| |
| // Verify that no per variable _Init_thread instructions are emitted for non-trivial static locals |
| // These would normally be emitted by the MicrosoftCXXABI, but the DirectX backend should exlude them |
| // Instead, check for the guardvar oparations that should protect the constructor initialization should |
| // only take place once. |
| |
| RWBuffer<int> buf[10]; |
| |
| void InitBuf(RWBuffer<int> buf) { |
| for (unsigned int i = 0; i < 100; i++) |
| buf[i] = 0; |
| } |
| |
| // CHECK-NOT: _Init_thread_epoch |
| // CHECK: define internal void @_Z4mainv |
| // CHECK-NEXT: entry: |
| // CHECK-NEXT: [[Tmp1:%.*]] = alloca %"class.hlsl::RWBuffer" |
| // CHECK-NEXT: [[Tmp2:%.*]] = load i8, ptr @_ZGVZ4mainvE5mybuf |
| // CHECK-NEXT: [[Tmp3:%.*]] = icmp eq i8 [[Tmp2]], 0 |
| // CHECK-NEXT: br i1 [[Tmp3]] |
| // CHECK-NOT: _Init_thread_header |
| // CHECK: init.check: |
| // CHECK-NEXT: call void @_ZN4hlsl8RWBufferIiEC1Ejijj |
| // CHECK-NEXT: store i8 1, ptr @_ZGVZ4mainvE5mybuf |
| // CHECK-NOT: _Init_thread_footer |
| |
| |
| [shader("compute")] |
| [numthreads(1,1,1)] |
| void main() { |
| // A non-trivially constructed static local will get checks to verify that it is generated just once |
| static RWBuffer<int> mybuf; |
| mybuf = buf[0]; |
| InitBuf(mybuf); |
| } |
