[LLVMbugs] [Bug 14347] New: BBVectorize is non-deterministic

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Wed Nov 14 16:42:22 PST 2012


             Bug #: 14347
           Summary: BBVectorize is non-deterministic
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Scalar Optimizations
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: hfinkel at anl.gov
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

The vectorization plan selection phase iterated over the children of the
current node using a DenseMap. Unfortunately, the order of the iteration
mattered (because given two children of the same weight, the first one would be

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