1; Make sure MSan handles llvm.launder.invariant.group correctly. 2 3; RUN: opt < %s -passes='module(msan),default<O1>' -msan-kernel=1 -S | FileCheck -check-prefixes=CHECK %s 4; RUN: opt < %s -passes='module(msan),default<O1>' -S | FileCheck -check-prefixes=CHECK %s 5 6target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 7target triple = "x86_64-unknown-linux-gnu" 8 9%class.Foo = type { ptr } 10@flag = dso_local local_unnamed_addr global i8 0, align 1 11 12define dso_local ptr @_Z1fv() local_unnamed_addr #0 { 13entry: 14 %p = alloca ptr, align 8 15 call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %p) 16 %0 = load i8, ptr @flag, align 1 17 %tobool = icmp ne i8 %0, 0 18 %call = call zeroext i1 @_Z2f1PPvb(ptr nonnull %p, i1 zeroext %tobool) 19 %1 = load ptr, ptr %p, align 8 20 %2 = call ptr @llvm.launder.invariant.group.p0(ptr %1) 21 %retval.0 = select i1 %call, ptr %2, ptr null 22 call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %p) 23 ret ptr %retval.0 24} 25 26; CHECK-NOT: call void @__msan_warning_with_origin_noreturn 27 28declare dso_local zeroext i1 @_Z2f1PPvb(ptr, i1 zeroext) local_unnamed_addr 29 30declare ptr @llvm.launder.invariant.group.p0(ptr) 31 32declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) 33 34declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) 35 36attributes #0 = { sanitize_memory uwtable } 37