5fc9449c96
It doesn't matter which value we use for dead args, so let's switch to poison, so we can eventually kill undef. Reviewed By: aeubanks, fhahn Differential Revision: https://reviews.llvm.org/D125983
24 lines
1.2 KiB
C
24 lines
1.2 KiB
C
// RUN: %clang_cc1 -no-opaque-pointers -x c -std=c89 -fblocks -debug-info-kind=standalone -emit-llvm -O0 \
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// RUN: -triple x86_64-apple-darwin -o - %s | FileCheck %s
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// RUN: %clang_cc1 -no-opaque-pointers -x c -std=c89 -fblocks -debug-info-kind=standalone -emit-llvm -O1 \
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// RUN: -triple x86_64-apple-darwin -o - %s \
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// RUN: | FileCheck --check-prefix=CHECK-OPT %s
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// CHECK: define internal void @__f_block_invoke(i8* noundef %.block_descriptor)
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// CHECK: %.block_descriptor.addr = alloca i8*, align 8
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// CHECK: %block.addr = alloca <{ i8*, i32, i32, i8*, %struct.__block_descriptor* }>*, align 8
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// CHECK: store i8* %.block_descriptor, i8** %.block_descriptor.addr, align 8
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// CHECK: call void @llvm.dbg.declare(metadata i8** %.block_descriptor.addr,
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// CHECK-SAME: metadata !DIExpression())
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// CHECK-OPT-NOT: alloca
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// Since the block address is not used anywhere in this function,
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// the optimizer (DeadArgElim) has replaced all the false uses
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// (i.e., metadata users) with poison.
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// CHECK-OPT: call void @llvm.dbg.value(metadata i8* poison,
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// CHECK-OPT-SAME: metadata !DIExpression())
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void f(void) {
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a(^{
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b();
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});
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}
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