[LLVMbugs] [Bug 2108] Horrible x86 codegen for _mm_loadl_epi64

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Wed Apr 9 22:38:34 PDT 2008


Chris Lattner <sabre at nondot.org> changed:

           What    |Removed                     |Added
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #5 from Chris Lattner <sabre at nondot.org>  2008-04-10 00:38:34 ---
Here is a reduced testcase:

define fastcc double @doload64(i64 %x) nounwind  {
        %tmp717 = bitcast i64 %x to double              ; <double> [#uses=1]
        ret double %tmp717

compiles to:

        subl    $12, %esp
        movl    20(%esp), %eax
        movl    %eax, 4(%esp)
        movl    16(%esp), %eax
        movl    %eax, (%esp)
        movsd   (%esp), %xmm0
        addl    $12, %esp

I moved this to the X86 readme for the x86-32 piece.  The x86-64 piece is


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