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| author | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2014-06-09 14:29:34 +0000 |
|---|---|---|
| committer | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2014-06-09 14:29:34 +0000 |
| commit | 24f5e55fce66d8c824aadf8dddfa256c040ea68e (patch) | |
| tree | a5545ab6bdd68f1a33758b8abfc22eaad0826f7b /test/Instrumentation | |
| parent | 5b7ac8ba184aa020fcda6c0e787a2077edd882d2 (diff) | |
| download | llvm-24f5e55fce66d8c824aadf8dddfa256c040ea68e.tar.gz llvm-24f5e55fce66d8c824aadf8dddfa256c040ea68e.tar.bz2 llvm-24f5e55fce66d8c824aadf8dddfa256c040ea68e.tar.xz | |
[msan] Workaround for invalid origins in shufflevector.
Makes origin propagation ignore literal undef operands, and,
in general, any operand we don't have origin for.
https://code.google.com/p/memory-sanitizer/issues/detail?id=56
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210472 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Instrumentation')
| -rw-r--r-- | test/Instrumentation/MemorySanitizer/missing_origin.ll | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/test/Instrumentation/MemorySanitizer/missing_origin.ll b/test/Instrumentation/MemorySanitizer/missing_origin.ll new file mode 100644 index 0000000000..d8addce0da --- /dev/null +++ b/test/Instrumentation/MemorySanitizer/missing_origin.ll @@ -0,0 +1,19 @@ +; RUN: opt < %s -msan -msan-check-access-address=0 -msan-track-origins=1 -S | FileCheck -check-prefix=CHECK -check-prefix=CHECK %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 result origin is directy propagated from the argument, +; and is not affected by all the literal undef operands. +; https://code.google.com/p/memory-sanitizer/issues/detail?id=56 + +define <4 x i32> @Shuffle(<4 x i32> %x) nounwind uwtable sanitize_memory { +entry: + %y = shufflevector <4 x i32> %x, <4 x i32> undef, <4 x i32> <i32 1, i32 undef, i32 undef, i32 undef> + ret <4 x i32> %y +} + +; CHECK-LABEL: @Shuffle( +; CHECK: [[A:%.*]] = load i32* {{.*}}@__msan_param_origin_tls, +; CHECK: store i32 [[A]], i32* @__msan_retval_origin_tls +; CHECK: ret <4 x i32> |