a8a49923dd
HLSL doesn't have a C++ runtime that supports `atexit` registration. To enable global destructors we instead rely on the `llvm.global_dtor` mechanism. This change disables `atexit` generation for HLSL and updates the HLSL code generation to call global destructors on the exit from entry functions. Depends on D132977. Reviewed By: aaron.ballman Differential Revision: https://reviews.llvm.org/D133518
28 lines
743 B
HLSL
28 lines
743 B
HLSL
// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-compute -S -emit-llvm -disable-llvm-passes %s -o - | FileCheck %s
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int i;
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__attribute__((constructor)) void call_me_first(void) {
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i = 12;
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}
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__attribute__((constructor)) void then_call_me(void) {
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i = 12;
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}
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__attribute__((destructor)) void call_me_last(void) {
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i = 0;
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}
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[numthreads(1,1,1)]
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void main(unsigned GI : SV_GroupIndex) {}
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//CHECK: define void @main()
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//CHECK-NEXT: entry:
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//CHECK-NEXT: call void @"?call_me_first@@YAXXZ"()
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//CHECK-NEXT: call void @"?then_call_me@@YAXXZ"()
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//CHECK-NEXT: %0 = call i32 @llvm.dx.flattened.thread.id.in.group()
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//CHECK-NEXT: call void @"?main@@YAXI@Z"(i32 %0)
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//CHECK-NEXT: call void @"?call_me_last@@YAXXZ"(
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//CHECK-NEXT: ret void
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