[llvm-bugs] [Bug 46155] New: [LoopVectorizer] Assertion `Part < UF && "Queried Vector Part is too large."' failed.

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=46155

            Bug ID: 46155
           Summary: [LoopVectorizer]  Assertion `Part < UF && "Queried
                    Vector Part is too large."' failed.
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Loop Optimizer
          Assignee: unassignedbugs at nondot.org
          Reporter: paulsson at linux.vnet.ibm.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 23559
  --> https://bugs.llvm.org/attachment.cgi?id=23559&action=edit
reduced testcase

opt -mtriple=s390x-linux-gnu -O3 tc_loopvec.ll
-tiny-trip-count-interleave-threshold=4 -vectorizer-min-trip-count=8
-unroll-full-max-count=1

Vectorize/VPlan.h:137: bool
llvm::VectorizerValueMap::hasVectorValue(llvm::Value*, unsigned int) const:
Assertion `Part < UF && "Queried Vector Part is too large."' failed.
...
#11 0x000002aa090fb0d2 llvm::InnerLoopVectorizer::fixCrossIterationPHIs()#11
0x000002aa090fb0d2 llvm::InnerLoopVectorizer::fixCrossIterationPHIs()
...

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