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