[LLVMbugs] [Bug 6016] New: llvm.x86.ssse3.pabs intrinsics should be removed

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Tue Jan 12 10:53:30 PST 2010


           Summary: llvm.x86.ssse3.pabs intrinsics should be removed
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Keywords: code-cleanup, code-quality
          Severity: normal
          Priority: P2
         Component: Backend: X86
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: clattner at apple.com
                CC: llvmbugs at cs.uiuc.edu

the llvm.x86.ssse3.pabs* intrinsics can all be expressed as an AND with a
constant vector.  We should eliminate these intrinsics and just pattern match
the appropriate and.  This allows us to generate pabsw and friends for the
corresponding pattern.

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