https://bugs.llvm.org/show_bug.cgi?id=36983
Bug ID: 36983
Summary: [LoopVersioningLICM] "Incoming value isn't loop
invariant" assert in LoopVectorizer fails.
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: pauls...@linux.vnet.ibm.com
CC: llvm-bugs@lists.llvm.org
Created attachment 20153
--> https://bugs.llvm.org/attachment.cgi?id=20153&action=edit
reduced testcase
bin/opt -mtriple=s390x-linux-gnu -mcpu=z13 ./tc_loopverlicm.ll -S -o /dev/null
-O3 -enable-loop-versioning-licm
When LoopVersioningLICM is run, LoopVectorizer detects an error in the original
(input) loop:
void llvm::InnerLoopVectorizer::fixLCSSAPHIs(): Assertion
`OrigLoop->isLoopInvariant(LCSSAPhi.getIncomingValue(0)) && "Incoming value
isn't loop invariant"' failed.
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