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3 Commits

Author SHA1 Message Date
Gui Andrade 05e3ab41e4 [MSAN] Avoid dangling ActualFnStart when replacing instruction 
This would be a problem if the entire instrumented function was a call
to
e.g. memcpy

Use FnPrologueEnd Instruction* instead of ActualFnStart BB*

Differential Revision: https://reviews.llvm.org/D86001
 2020-08-14 23:50:38 +00:00
Gui Andrade 36ebabc153 [MSAN] Convert ActualFnStart to be a particular Instruction *, not BB 
This allows us to add addtional instrumentation before the function start,
without splitting the first BB.

Differential Revision: https://reviews.llvm.org/D85985
 2020-08-14 21:43:56 +00:00
Evgenii Stepanov 1df8549b26 [msan] Instrument x86.pclmulqdq* intrinsics. 
Summary:
These instructions ignore parts of the input vectors which makes the
default MSan handling too strict and causes false positive reports.

Reviewers: vitalybuka, RKSimon, thakis

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D73374
 2020-01-24 14:31:06 -08:00