[LLVMbugs] [Bug 2577] New: Support __builtin_expect

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=2577

           Summary: Support __builtin_expect
           Product: new-bugs
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: daniel at zuster.org
                CC: llvmbugs at cs.uiuc.edu


We should use the information provided by the gcc __builtin_expect function.

This involves adding some mechanism for encoding the information in the LLVM IR
(most likely an intrinsic) and updating llvm-gcc and clang to emit this
information.


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