[LLVMbugs] [Bug 10098] New: Should codegen to CVTDQ2PD etc but is scalarized

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Wed Jun 8 02:03:02 PDT 2011


           Summary: Should codegen to CVTDQ2PD etc but is scalarized
           Product: new-bugs
           Version: 2.9
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: baldrick at free.fr
                CC: llvmbugs at cs.uiuc.edu

Created an attachment (id=6709)
 --> (http://llvm.org/bugs/attachment.cgi?id=6709)
testcase .ll

In the attached testcases, the vector operations are all scalarized by codegen,
but GCC manages to produce vector code for all of them (they correspond to
vec_unpack_lo_expr, vec_unpack_hi_expr, vec_unpack_float_lo_expr,
vec_unpack_float_hi_expr).  The simplest case looks to be @float_lo which could
be codegened as a CVTDQ2PD instruction.

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