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For more info for what reason it was invented, goto: http://lists.llvm.org/pipermail/cfe-dev/2015-July/044227.html invariant.group.barrier: http://reviews.llvm.org/D12310 docs: http://reviews.llvm.org/D11399 CodeGenPrepare: http://reviews.llvm.org/D12875 llvm-svn: 247711
23 lines
538 B
LLVM
23 lines
538 B
LLVM
; RUN: opt -codegenprepare -S < %s | FileCheck %s
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@tmp = global i8 0
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; CHECK-LABEL: define void @foo() {
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define void @foo() {
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enter:
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; CHECK-NOT: !invariant.group
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; CHECK-NOT: @llvm.invariant.group.barrier(
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; CHECK: %val = load i8, i8* @tmp
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%val = load i8, i8* @tmp, !invariant.group !0
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%ptr = call i8* @llvm.invariant.group.barrier(i8* @tmp)
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; CHECK: store i8 42, i8* @tmp
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store i8 42, i8* %ptr, !invariant.group !0
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ret void
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}
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; CHECK-LABEL: }
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declare i8* @llvm.invariant.group.barrier(i8*)
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!0 = !{!"something"} |