Michael Kuperstein 6418278e7d Fix mem2reg to correctly handle allocas only used in a single block ... Currently, a load from an alloca that is used in as single block and is not preceded by a store is replaced by undef. This is not always correct if the single block is inside a loop. Fix the logic so that: 1) If there are no stores in the block, replace the load with an undef, as before. 2) If there is a store (regardless of where it is in the block w.r.t the load), bail out, and let the rest of mem2reg handle this alloca. Patch by: gil.rapaport@intel.com Differential Revision: http://reviews.llvm.org/D11355 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242884 91177308-0d34-0410-b5e6-96231b3b80d8		2015-07-22 10:29:29 +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	[InstCombine] Generalize sub of selects optimization to all BinaryOperators	2015-07-14 22:39:23 +00:00
Instrumentation	[asan] Improve moving of non-instrumented allocas	2015-07-22 10:25:38 +00:00
IPO	[PM/AA] Remove the last of the legacy update API from AliasAnalysis as	2015-07-22 09:49:59 +00:00
ObjCARC	Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC)	2015-06-23 09:49:53 +00:00
Scalar	[PM/AA] Remove all of the dead AliasAnalysis pointers being threaded	2015-07-22 09:52:54 +00:00
Utils	Fix mem2reg to correctly handle allocas only used in a single block	2015-07-22 10:29:29 +00:00
Vectorize	[PM/AA] Remove the last of the legacy update API from AliasAnalysis as	2015-07-22 09:49:59 +00:00
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