[llvm-bugs] [Bug 41574] New: Miscompile of collapse(2) in Polybench 2MM

via llvm-bugs llvm-bugs at lists.llvm.org
Tue Apr 23 17:42:41 PDT 2019


            Bug ID: 41574
           Summary: Miscompile of collapse(2) in Polybench 2MM
           Product: OpenMP
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Clang Compiler Support
          Assignee: unassignedclangbugs at nondot.org
          Reporter: jdoerfert at anl.gov
                CC: llvm-bugs at lists.llvm.org

This is unrelated to the other collapse(2) bug report (41572)!

Today I looked at the 2mm benchmark in Unibench:


The problem I found is that the verification for some, but not all locations
failed (build with -DRUN_TEST) due to the collapse(2) clause. If I remove it,
all locations are correct. I haven't looked into the issue but I wanted us to
have a bug report.

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