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Author SHA1 Message Date
Evgeniy Stepanov 62b5db9361 [msan] Transform memcpy and memset to library calls. 
This was already done for memmove, where it is required for correctness.
This change improves performance by avoiding copyingthe same memory twice.
Also, the library functions are given __msan_ prefix to prevent instcombine
pass from converting them back to intrinsics.

llvm-svn: 168876
 2012-11-29 12:49:04 +00:00
Evgeniy Stepanov 1d2da65bf8 [msan] Make sure that report callbacks do not get merged. 
llvm-svn: 168873
 2012-11-29 12:30:18 +00:00
Evgeniy Stepanov d4bd7b73e3 Initial commit of MemorySanitizer. 
Compiler pass only.

llvm-svn: 168866
 2012-11-29 09:57:20 +00:00