[PATCH] D37153: [LoopUnroll] Properly update the loop preheader in case of successful peeling
Davide Italiano via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Fri Aug 25 10:25:49 PDT 2017
davide created this revision.
When peeling kicks in, it updates the loop preheader.
Later, a successful full unroll of the loop needs to update a PHI which i-th argument comes from the loop preheader, so it'd better look at the correct block.
Fixes https://bugs.llvm.org/show_bug.cgi?id=33437
https://reviews.llvm.org/D37153
Files:
lib/Transforms/Utils/LoopUnroll.cpp
test/Transforms/LoopUnroll/SystemZ/lit.local.cfg
test/Transforms/LoopUnroll/SystemZ/pr33437.ll
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