3 Commits

Author	SHA1	Message	Date
Eric Christopher	598198edbc	Revert "Temporarily Revert "Add basic loop fusion pass."" ... The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358552 91177308-0d34-0410-b5e6-96231b3b80d8	2019-04-17 04:52:47 +00:00
Eric Christopher	02cc44c1b9	Temporarily Revert "Add basic loop fusion pass." ... As it's causing some bot failures (and per request from kbarton). This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358546 91177308-0d34-0410-b5e6-96231b3b80d8	2019-04-17 02:12:23 +00:00
Bjorn Pettersson	4513397601	[Reassociate] Skip analysis of dead code to avoid infinite loop. ... Summary: It was detected that the reassociate pass could enter an inifite loop when analysing dead code. Simply skipping to analyse basic blocks that are dead avoids such problems (and as a side effect we avoid spending time on optimising dead code). The solution is using the same Reverse Post Order ordering of the basic blocks when doing the optimisations, as when building the precalculated rank map. A nice side-effect of this solution is that we now know that we only try to do optimisations for blocks with ranked instructions. Fixes https://llvm.org/bugs/show_bug.cgi?id=30818 Reviewers: llvm-commits, davide, eli.friedman, mehdi_amini Subscribers: dberlin Differential Revision: https://reviews.llvm.org/D26154 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285793 91177308-0d34-0410-b5e6-96231b3b80d8	2016-11-02 08:55:19 +00:00