1 ; RUN: opt < %s -msan -S | FileCheck %s 2 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" 3 target triple = "x86_64-unknown-linux-gnu" 4 5 6 ; Test that MemorySanitizer correctly handles unreachable blocks. 7 8 define i32 @Func(i32* %p) nounwind uwtable { 9 entry: 10 br label %exit 11 12 unreachable: 13 %x = load i32* %p 14 br label %exit 15 16 exit: 17 %z = phi i32 [ 42, %entry ], [ %x, %unreachable ] 18 ret i32 %z 19 } 20 21 ; CHECK: @Func 22 ; CHECK: store i32 0, {{.*}} @__msan_retval_tls 23 ; CHECK: ret i32 42 24 25 26 define i32 @UnreachableLoop() nounwind uwtable { 27 entry: 28 ret i32 0 29 30 zzz: 31 br label %xxx 32 33 xxx: 34 br label %zzz 35 } 36 37 ; CHECK: @UnreachableLoop 38 ; CHECK: store i32 0, {{.*}} @__msan_retval_tls 39 ; CHECK: ret i32 0 40
