87e1da3f2e
`GroupMemoryBarrierWithGroupSync` is required to be marked as convergent so that it can't generate duplicate calls or be moved to identical control flow. Without it, we generate undefined behaviour during optimization. For instance: https://godbolt.org/z/9j3vsq1h3. Testing that the convergent attribute is added is sufficient. There already exists testing, [here](https://github.com/inbelic/llvm-project/blob/main/llvm/test/Transforms/SimplifyCFG/attr-convergent.ll), that it will not be moved as described in the above link.
21 lines
1014 B
HLSL
21 lines
1014 B
HLSL
// RUN: %clang_cc1 -finclude-default-header -x hlsl -triple \
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// RUN: dxil-pc-shadermodel6.3-library %s \
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// RUN: -emit-llvm -disable-llvm-passes -o - | FileCheck %s \
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// RUN: -DTARGET=dx -check-prefixes=CHECK,CHECK-DXIL
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// RUN: %clang_cc1 -finclude-default-header -x hlsl -triple \
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// RUN: spirv-unknown-vulkan-compute %s \
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// RUN: -emit-llvm -disable-llvm-passes -o - | FileCheck %s \
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// RUN: -DTARGET=spv -check-prefixes=CHECK,CHECK-SPIRV
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// CHECK-DXIL: define hidden void @
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// CHECK-SPIRV: define hidden spir_func void @
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void test_GroupMemoryBarrierWithGroupSync() {
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// CHECK-DXIL: call void @llvm.[[TARGET]].group.memory.barrier.with.group.sync()
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// CHECK-SPIRV: call spir_func void @llvm.[[TARGET]].group.memory.barrier.with.group.sync()
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GroupMemoryBarrierWithGroupSync();
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}
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// CHECK: declare void @llvm.[[TARGET]].group.memory.barrier.with.group.sync() #[[ATTRS:[0-9]+]]
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// CHECK-NOT: attributes #[[ATTRS]] = {{.+}}memory(none){{.+}}
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// CHECK: attributes #[[ATTRS]] = {{.+}}convergent{{.+}}
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