Merging r261513:

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r261513 | mohit.bhakkad | 2016-02-22 11:46:28 +0530 (Mon, 22 Feb 2016) | 7 lines

[MSan] Make unaligned load/store functions compatible for both endians

Reviewers: eugenis

Subscribers: jaydeep, sagar, llvm-commits

Differential Revision: http://reviews.llvm.org/D17371
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llvm-svn: 270396

compiler-rt/lib/msan/msan.cc

@@ -580,13 +580,13 @@ u32 __msan_get_umr_origin() {
 }
 
 u16 __sanitizer_unaligned_load16(const uu16 *p) {
-  __msan_retval_tls[0] = *(uu16 *)MEM_TO_SHADOW((uptr)p);
+  *(uu16 *)&__msan_retval_tls[0] = *(uu16 *)MEM_TO_SHADOW((uptr)p);
   if (__msan_get_track_origins())
     __msan_retval_origin_tls = GetOriginIfPoisoned((uptr)p, sizeof(*p));
   return *p;
 }
 u32 __sanitizer_unaligned_load32(const uu32 *p) {
-  __msan_retval_tls[0] = *(uu32 *)MEM_TO_SHADOW((uptr)p);
+  *(uu32 *)&__msan_retval_tls[0] = *(uu32 *)MEM_TO_SHADOW((uptr)p);
   if (__msan_get_track_origins())
     __msan_retval_origin_tls = GetOriginIfPoisoned((uptr)p, sizeof(*p));
   return *p;
@@ -598,15 +598,15 @@ u64 __sanitizer_unaligned_load64(const uu64 *p) {
   return *p;
 }
 void __sanitizer_unaligned_store16(uu16 *p, u16 x) {
-  u16 s = __msan_param_tls[1];
+  u16 s = *(uu16 *)&__msan_param_tls[1];
   *(uu16 *)MEM_TO_SHADOW((uptr)p) = s;
   if (s && __msan_get_track_origins())
     if (uu32 o = __msan_param_origin_tls[2])
       SetOriginIfPoisoned((uptr)p, (uptr)&s, sizeof(s), o);
   *p = x;
 }
 void __sanitizer_unaligned_store32(uu32 *p, u32 x) {
-  u32 s = __msan_param_tls[1];
+  u32 s = *(uu32 *)&__msan_param_tls[1];
   *(uu32 *)MEM_TO_SHADOW((uptr)p) = s;
   if (s && __msan_get_track_origins())
     if (uu32 o = __msan_param_origin_tls[2])