Sanjoy Das caee94bbb4 Revert some changes that were made to fix PR20680. ...

This re-lands change r230921.  r230921 was reverted because it broke a
clang test; a checkin fixing the clang test will be commited shortly.

Summary:
As far as I can tell, the real bug causing the issue was fixed in
r230533.  SCEVExpander should mark an increment operation as nuw or nsw
only if it can *prove* that the operation does not overflow.  There
shouldn't be any situation where we have to do something different
because of no-wrap flags generated by SCEVExpander.

Revert "IndVarSimplify: Allow LFTR to fire more often"

This reverts commit 1ade0f0faa (SVN: 222213).

Revert "IndVarSimplify: Don't let LFTR compare against a poison value"

This reverts commit c0f2b8b528 (SVN: 217102).

Reviewers: majnemer, atrick, spatel

Differential Revision: http://reviews.llvm.org/D7979

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231018 91177308-0d34-0410-b5e6-96231b3b80d8

2015-03-02 21:41:07 +00:00

..

Hello

…

InstCombine

[InstCombine/PowerPC] Convert aligned QPX load/store intrinsics into loads/stores

2015-02-26 18:56:03 +00:00

Instrumentation

[asan] Skip promotable allocas to improve performance at -O0

2015-02-27 03:12:36 +00:00

IPO

Convert push_back loops into append calls.

2015-02-28 13:20:15 +00:00

ObjCARC

[objc-arc-contract] We can not move retains over instructions which can not conservatively be proven to not decrement the retain's RCIdentity.

2015-02-20 00:02:49 +00:00

Scalar

Revert some changes that were made to fix PR20680.

2015-03-02 21:41:07 +00:00

Utils

Remap frame variables for native Windows exception handling.

2015-02-23 20:01:56 +00:00

Vectorize

Make ToVectorTy static.

2015-03-02 20:43:24 +00:00

CMakeLists.txt

…

LLVMBuild.txt

…

Makefile

…