[LLVMbugs] [Bug 233] NEW: [llvmgcc] Structure copies result in a LOT of code

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.cs.uiuc.edu/bugs/show_bug.cgi?id=233

           Summary: [llvmgcc] Structure copies result in a LOT of code
           Product: tools
           Version: 1.0
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: llvm-gcc
        AssignedTo: sabre at nondot.org
        ReportedBy: sabre at nondot.org


llvmgcc happily code generates structure copies to copy over each element of the
structure at a time.  Unfortunately, this can result in a LOT of code.  This bug
turns the "dumpcore" function in Spec95's m88ksim into a gigantic monstrosity
that make the optimizers weak in the knees.

This should be fixed by emitting a call to 'memcpy' if possible.

-Chris



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