[MSan] Don't emit __msan_instrument_asm_load() calls

LLVM treats void* pointers passed to assembly routines as pointers to
sized types.
We used to emit calls to __msan_instrument_asm_load() for every such
void*, which sometimes led to false positives.
A less error-prone (and truly "conservative") approach is to unpoison
only assembly output arguments.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@349734 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed