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Should be committed as one CL.
This reverts commits r277068 r277067 r277066. llvm-svn: 277071
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0bf71180f8
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@ -2243,11 +2243,6 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) {
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break;
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}
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case Intrinsic::lifetime_start:
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// Asan needs to poison memory to detect invalid access which is possible
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// even for empty lifetime range.
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if (II->getFunction()->hasFnAttribute(Attribute::SanitizeAddress))
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break;
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if (removeTriviallyEmptyRange(*II, Intrinsic::lifetime_start,
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Intrinsic::lifetime_end, *this))
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return nullptr;
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@ -1,35 +0,0 @@
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; RUN: opt < %s -instcombine -S | FileCheck %s
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declare void @llvm.lifetime.start(i64, i8* nocapture)
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declare void @llvm.lifetime.end(i64, i8* nocapture)
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declare void @foo(i8* nocapture)
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define void @asan() sanitize_address {
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entry:
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; CHECK-LABEL: @asan(
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%text = alloca i8, align 1
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call void @llvm.lifetime.start(i64 1, i8* %text)
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call void @llvm.lifetime.end(i64 1, i8* %text)
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; CHECK: call void @llvm.lifetime.start
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; CHECK-NEXT: call void @llvm.lifetime.end
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call void @foo(i8* %text) ; Keep alloca alive
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ret void
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}
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define void @no_asan() {
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entry:
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; CHECK-LABEL: @no_asan(
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%text = alloca i8, align 1
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call void @llvm.lifetime.start(i64 1, i8* %text)
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call void @llvm.lifetime.end(i64 1, i8* %text)
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; CHECK-NO: call void @llvm.lifetime
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call void @foo(i8* %text) ; Keep alloca alive
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ret void
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}
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