Alexey Samsonov d5852a39f2 [ASan] Disable dynamic alloca and UAR detection in presence of returns_twice calls. ... Summary: returns_twice (most importantly, setjmp) functions are optimization-hostile: if local variable is promoted to register, and is changed between setjmp() and longjmp() calls, this update will be undone. This is the reason why "man setjmp" advises to mark all these locals as "volatile". This can not be enough for ASan, though: when it replaces static alloca with dynamic one, optionally called if UAR mode is enabled, it adds a whole lot of SSA values, and computations of local variable addresses, that can involve virtual registers, and cause unexpected behavior, when these registers are restored from buffer saved in setjmp. To fix this, just disable dynamic alloca and UAR tricks whenever we see a returns_twice call in the function. Reviewers: rnk Subscribers: llvm-commits, kcc Differential Revision: http://reviews.llvm.org/D11495 llvm-svn: 243561		2015-07-29 19:36:08 +00:00
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Hello	Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC)	2015-06-23 09:49:53 +00:00
InstCombine	fix formatting; NFC	2015-07-28 15:38:43 +00:00
Instrumentation	[ASan] Disable dynamic alloca and UAR detection in presence of returns_twice calls.	2015-07-29 19:36:08 +00:00
IPO	LowerBitSets: Add debugging output.	2015-07-29 18:12:36 +00:00
ObjCARC	[PM/AA] Extract the ModRef enums from the AliasAnalysis class in	2015-07-22 23:15:57 +00:00
Scalar	[Unroll] Handle SwitchInst properly.	2015-07-29 18:10:33 +00:00
Utils	[LDist][LVer] Explicitly pass the set of memchecks to LoopVersioning, NFC	2015-07-28 05:01:53 +00:00
Vectorize	Fix -Wextra-semi warnings.	2015-07-22 20:46:11 +00:00
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