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Should be committed as one CL.

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This reverts commits r277068 r277067 r277066.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277071 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vitaly Buka 2016-07-28 22:59:01 +00:00
parent 34ad8f0f0b
commit 3ec908dfba
2 changed files with 0 additions and 40 deletions
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5
lib/Transforms/InstCombine/InstCombineCalls.cpp
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@ -2243,11 +2243,6 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) {
break;
}
case Intrinsic::lifetime_start:
// Asan needs to poison memory to detect invalid access which is possible
// even for empty lifetime range.
if (II->getFunction()->hasFnAttribute(Attribute::SanitizeAddress))
break;
if (removeTriviallyEmptyRange(*II, Intrinsic::lifetime_start,
Intrinsic::lifetime_end, *this))
return nullptr;

35
test/Transforms/InstCombine/lifetime-asan.ll
View File

@ -1,35 +0,0 @@
; RUN: opt < %s -instcombine -S | FileCheck %s
declare void @llvm.lifetime.start(i64, i8* nocapture)
declare void @llvm.lifetime.end(i64, i8* nocapture)
declare void @foo(i8* nocapture)
define void @asan() sanitize_address {
entry:
; CHECK-LABEL: @asan(
%text = alloca i8, align 1
call void @llvm.lifetime.start(i64 1, i8* %text)
call void @llvm.lifetime.end(i64 1, i8* %text)
; CHECK: call void @llvm.lifetime.start
; CHECK-NEXT: call void @llvm.lifetime.end
call void @foo(i8* %text) ; Keep alloca alive
ret void
}
define void @no_asan() {
entry:
; CHECK-LABEL: @no_asan(
%text = alloca i8, align 1
call void @llvm.lifetime.start(i64 1, i8* %text)
call void @llvm.lifetime.end(i64 1, i8* %text)
; CHECK-NO: call void @llvm.lifetime
call void @foo(i8* %text) ; Keep alloca alive
ret void
}