[LLVMbugs] [Bug 10251] New: Early tail dup still not as good and duplicating indirectbr in clang

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=10251

           Summary: Early tail dup still not as good and duplicating
                    indirectbr in clang
           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: rafael.espindola at gmail.com
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=6813)
 --> (http://llvm.org/bugs/attachment.cgi?id=6813)
indirect.patch

Things got a lot better with the new improvements to the coalescer, but
duplicating indirectbr in clang still produces better results.

In jsinterp.o, the current trunk produces:

171419    3904    0    0    175323    2acdb

And duplicating indirectbr in clang produces:

117275    3904    0    0    121179    1d95b

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