[LLVMbugs] [Bug 1275] NEW: Combine zero/sign/any extended rotl/rotr patterns

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=1275

           Summary: Combine zero/sign/any extended rotl/rotr patterns
           Product: libraries
           Version: trunk
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Common Code Generator Code
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: scottm at aero.org


The attached patch adds the ability to fold zero/sign/any extended rotl/rotr 
patterns that occur in the test/CodeGen/X86/rotate.ll test file on other 
platforms (PPC, CellSPU). Also added the ability to custom lower rotl and rotr, 
since the Cell only supports 16 and 32-bit rotate instructions (needed to 
custom lower for 8-bit, for example.)



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