[LLVMbugs] [Bug 278] NEW: [llvmgcc] C front-end should only output a given constant string once

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.cs.uiuc.edu/bugs/show_bug.cgi?id=278

           Summary: [llvmgcc] C front-end should only output a given
                    constant string once
           Product: tools
           Version: 1.0
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: llvm-gcc
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: sabre at nondot.org


Currently the C front-end can emit the same constant string multiple times, if
it is "uttered" multiple times.  Instead of relying on the LLVM constant merging
pass to deal with this, we might as well only GENERATE one of each constant
string if there are dups.  Testcases like this are the most common:

char *X[] = { "foo", "foo", "foo", "bar", "bar", ...};

This is strictly a compiler speedup, it should have no effect on code quality or
correctness.

-Chris



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