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Diffstat (limited to 'test/Instrumentation/MemorySanitizer/unreachable.ll')
| -rw-r--r-- | test/Instrumentation/MemorySanitizer/unreachable.ll | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/test/Instrumentation/MemorySanitizer/unreachable.ll b/test/Instrumentation/MemorySanitizer/unreachable.ll new file mode 100644 index 0000000000..66a9575d3f --- /dev/null +++ b/test/Instrumentation/MemorySanitizer/unreachable.ll @@ -0,0 +1,23 @@ +; 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* %p + br label %exit + +exit: + %z = phi i32 [ 42, %entry ], [ %x, %unreachable ] + ret i32 %z +} + +; CHECK: @Func +; CHECK: store i32 0, {{.*}} @__msan_retval_tls +; CHECK: ret i32 42 |