forked from OSchip/llvm-project
39 lines
1.4 KiB
LLVM
39 lines
1.4 KiB
LLVM
; Make sure MSan handles llvm.launder.invariant.group correctly.
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; RUN: opt < %s -passes='function(msan),default<O1>' -msan-kernel=1 -S | FileCheck -check-prefixes=CHECK %s
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; RUN: opt < %s -passes='function(msan),default<O1>' -S | FileCheck -check-prefixes=CHECK %s
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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%class.Foo = type { i32 (...)** }
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@flag = dso_local local_unnamed_addr global i8 0, align 1
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define dso_local %class.Foo* @_Z1fv() local_unnamed_addr #0 {
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entry:
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%p = alloca i8*, align 8
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%0 = bitcast i8** %p to i8*
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call void @llvm.lifetime.start.p0i8(i64 8, i8* nonnull %0)
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%1 = load i8, i8* @flag, align 1
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%tobool = icmp ne i8 %1, 0
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%call = call zeroext i1 @_Z2f1PPvb(i8** nonnull %p, i1 zeroext %tobool)
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%2 = load i8*, i8** %p, align 8
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%3 = call i8* @llvm.launder.invariant.group.p0i8(i8* %2)
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%4 = bitcast i8* %3 to %class.Foo*
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%retval.0 = select i1 %call, %class.Foo* %4, %class.Foo* null
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call void @llvm.lifetime.end.p0i8(i64 8, i8* nonnull %0)
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ret %class.Foo* %retval.0
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}
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; CHECK-NOT: call void @__msan_warning_with_origin_noreturn
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declare dso_local zeroext i1 @_Z2f1PPvb(i8**, i1 zeroext) local_unnamed_addr
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declare i8* @llvm.launder.invariant.group.p0i8(i8*)
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declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture)
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declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture)
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attributes #0 = { sanitize_memory uwtable }
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