[LLVMbugs] [Bug 9398] New: 10% of llc compile time is spent in Value::getNumUses

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=9398

           Summary: 10% of llc compile time is spent in Value::getNumUses
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Common Code Generator Code
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: stoklund at 2pi.dk
                CC: llvmbugs at cs.uiuc.edu


When running llc on 403.gcc, 10% of total code generation time is spent in
Value::getNumUses().

It is being called from CodeGenPrepare::OptimizeMemoryInst().

I think we need to tweak that algorithm.

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