[LLVMbugs] [Bug 9579] New: A bug in InstructionSimplify.cpp

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Tue Mar 29 05:47:15 PDT 2011


           Summary: A bug in InstructionSimplify.cpp
           Product: libraries
           Version: trunk
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: release blocker
          Priority: P
         Component: Scalar Optimizations
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: vslugovsky at gmail.com
                CC: llvmbugs at cs.uiuc.edu

Created an attachment (id=6368)
 --> (http://llvm.org/bugs/attachment.cgi?id=6368)
A quick fix

SimplifyICmpInst replaces vector ICmp instructions with scalar true or false
constants (which leads to a failed assertion later).

A quick fix is to avoid doing this optimisation for vectors (any way, another
optimisation takes care of most of that cases), see the attachment.

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