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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 %s4; RUN: opt < %s -passes='module(msan),default<O1>' -S | FileCheck -check-prefixes=CHECK %s5 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 111 12define dso_local ptr @_Z1fv() local_unnamed_addr #0 {13entry:14 %p = alloca ptr, align 815 call void @llvm.lifetime.start.p0(ptr nonnull %p)16 %0 = load i8, ptr @flag, align 117 %tobool = icmp ne i8 %0, 018 %call = call zeroext i1 @_Z2f1PPvb(ptr nonnull %p, i1 zeroext %tobool)19 %1 = load ptr, ptr %p, align 820 %2 = call ptr @llvm.launder.invariant.group.p0(ptr %1)21 %retval.0 = select i1 %call, ptr %2, ptr null22 call void @llvm.lifetime.end.p0(ptr nonnull %p)23 ret ptr %retval.024}25 26; CHECK-NOT: call void @__msan_warning_with_origin_noreturn27 28declare dso_local zeroext i1 @_Z2f1PPvb(ptr, i1 zeroext) local_unnamed_addr29 30declare ptr @llvm.launder.invariant.group.p0(ptr)31 32declare void @llvm.lifetime.start.p0(ptr nocapture)33 34declare void @llvm.lifetime.end.p0(ptr nocapture)35 36attributes #0 = { sanitize_memory uwtable }37