| ; RUN: opt < %s -msan -S | FileCheck %s |
| 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" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| |
| ; Test that MemorySanitizer correctly handles unreachable blocks. |
| |
| define i32 @Func(i32* %p) nounwind uwtable { |
| entry: |
| br label %exit |
| |
| unreachable: |
| %x = load i32, i32* %p |
| br label %exit |
| |
| exit: |
| %z = phi i32 [ 42, %entry ], [ %x, %unreachable ] |
| ret i32 %z |
| } |
| |
| ; CHECK-LABEL: @Func |
| ; CHECK: store i32 0, {{.*}} @__msan_retval_tls |
| ; CHECK: ret i32 42 |
| |
| |
| define i32 @UnreachableLoop() nounwind uwtable { |
| entry: |
| ret i32 0 |
| |
| zzz: |
| br label %xxx |
| |
| xxx: |
| br label %zzz |
| } |
| |
| ; CHECK-LABEL: @UnreachableLoop |
| ; CHECK: store i32 0, {{.*}} @__msan_retval_tls |
| ; CHECK: ret i32 0 |