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Disable gvn non-local speculative loads under asan. 

Summary: Fix for https://llvm.org/bugs/show_bug.cgi?id=25550

Differential Revision: http://reviews.llvm.org/D14764

llvm-svn: 253499
This commit is contained in:
Mike Aizatsky 2015-11-18 20:43:20 +00:00
parent c7810baaa6
commit 52025af820
1 changed files with 21 additions and 0 deletions
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21
compiler-rt/test/asan/TestCases/speculative_load2.cc Normal file
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// Verifies that speculative loads from unions do not happen under asan.
// RUN: %clangxx_asan -O0 %s -o %t && ASAN_OPTIONS=detect_leaks=0 %run %t 2>&1
// RUN: %clangxx_asan -O1 %s -o %t && ASAN_OPTIONS=detect_leaks=0 %run %t 2>&1
// RUN: %clangxx_asan -O2 %s -o %t && ASAN_OPTIONS=detect_leaks=0 %run %t 2>&1
// RUN: %clangxx_asan -O3 %s -o %t && ASAN_OPTIONS=detect_leaks=0 %run %t 2>&1
typedef union {
short q;
struct {
short x;
short y;
int for_alignment;
} w;
} U;
int main() {
char *buf = new char[2];
buf[0] = buf[1] = 0x0;
U *u = (U *)buf;
return u->q == 0 ? 0 : u->w.y;
}