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5 Commits

Author SHA1 Message Date
Eric Christopher cee313d288 Revert "Temporarily Revert "Add basic loop fusion pass."" 
The reversion apparently deleted the test/Transforms directory.

Will be re-reverting again.

llvm-svn: 358552
 2019-04-17 04:52:47 +00:00
Eric Christopher a863435128 Temporarily Revert "Add basic loop fusion pass." 
As it's causing some bot failures (and per request from kbarton).

This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda.

llvm-svn: 358546
 2019-04-17 02:12:23 +00:00
Chad Rosier e2cbd13e56 [ValueTracking] Improve isImpliedCondition when the dominating cond is false. 
llvm-svn: 267430
 2016-04-25 17:23:36 +00:00
Chad Rosier b7dfbb40a3 [ValueTracking] Improve isImpliedCondition for conditions with matching operands. 
This patch improves SimplifyCFG to catch cases like:

  if (a < b) {
    if (a > b) <- known to be false
      unreachable;
  }

Phabricator Revision: http://reviews.llvm.org/D18905

llvm-svn: 266767
 2016-04-19 17:19:14 +00:00
Sanjoy Das 13e63a2f21 [JumpThreading] Use dominating conditions to prove implications 
Summary:
If P branches to Q conditional on C and Q branches to R conditional on
C' and C => C' then the branch conditional on C' can be folded to an
unconditional branch.

Reviewers: reames

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D13972

llvm-svn: 251557
 2015-10-28 21:27:08 +00:00