[LLVMbugs] [Bug 18687] New: Investigate replacing SSE _Int "sort-of"-insts with def pats as in r200577.

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Fri Jan 31 15:52:33 PST 2014


            Bug ID: 18687
           Summary: Investigate replacing SSE _Int "sort-of"-insts with
                    def pats as in r200577.
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: lhames at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

In r200577 some FMA3 "sort-of"-insts (they're not pseudo-insts in the normal
sense, they're actual duplicate instructions with 'isCodeGenOnly' tags) were
replaced with def-pats. It may be possible to replace several similar
"sort-of"-insts in X86InstrSSE with similar pats. This would be a useful tidy
up and may (as r200577 did) expose some extra memory-folding opportunities.

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