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* Wrong debug info generated at -O2 (-O0 is correct)Vedant Kumar2019-11-071-4/+5
| | | | | | | | | | | | | | | | Instcombiner pass was erasing trivially dead instruction without updating dependent llvm.dbg.value. which was not showing programmer current state of variables while debugging. As a part of this fix I did following, Iterate throught all the users (llvm.dbg) of a instruction which is trivially dead and set each if them undef, Before deleting the instruction. Now user will see optimized out, when try to print those variables. This fixes https://bugs.llvm.org/show_bug.cgi?id=43893 This is my first fix to llvm. Patch by kamlesh kumar! Differential Revision: https://reviews.llvm.org/D69809
* Revert "Temporarily Revert "Add basic loop fusion pass.""Eric Christopher2019-04-171-0/+47
| | | | | | | | The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
* Temporarily Revert "Add basic loop fusion pass."Eric Christopher2019-04-171-47/+0
| | | | | | | | As it's causing some bot failures (and per request from kbarton). This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda. llvm-svn: 358546
* [InstCombine] Skip dbg.value(s) when looking at stack{save,restore}.Davide Italiano2018-06-081-0/+47
Fixes PR37713. llvm-svn: 334317
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