[LLVMbugs] [Bug 1182] NEW: predsimplify makes lamba 10% slower

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Mon Feb 5 20:13:51 PST 2007


           Summary: predsimplify makes lamba 10% slower
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Backend: X86
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: nicholas at mxc.ca

Adding -predsimplify to the compilation of
MultiSource/Applications/lambda-0.1.3/lambda causes it to take 10% longer. It
appears that the optimization is actually triggering bad behaviour in the
backend. I've extracted just "main" to illustrate the problem.

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