[LLVMbugs] [Bug 14753] New: Should recognize memset loop with a global induction variable

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=14753

             Bug #: 14753
           Summary: Should recognize memset loop with a global induction
                    variable
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Scalar Optimizations
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: gribozavr at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Currently this loop is not rewritten into a memset:

int gi;

void foo2(int n, float *a) {
  for(gi = 0; gi < n; gi++)
    a[gi] = 0;
}

It should be safe to do so since float *a and int gi may not alias.

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