[Bug rtl-optimization/18614] [3.4 Regression] ICE in simplify_binary_operation

[uros at gcc dot gnu dot org]

------- Additional Comments From uros at gcc dot gnu dot org  2004-11-23 13:26 -------
Works OK with gcc version 4.0.0 20041123 (experimental). Following ASM is
produced with 'gcc -march=pentium4 -mcpu=pentium4 -msse2 -funroll-loops':

.LC0:
        .long  0
        .long  1072693248
        .long  0
        .long  1074790400
        .text
.globl main
        .type  main, @function
main:
        pushl  %ebp
        movl   %esp, %ebp
        subl   $40, %esp
        andl   $-16, %esp
        movl   $0, %eax       |
        addl   $15, %eax      |
        addl   $15, %eax      |
        shrl   $4, %eax       |<--- WHY?
        sall   $4, %eax       |
        subl   %eax, %esp
        movapd .LC0, %xmm0
        movapd %xmm0, -24(%ebp)
        cvtpd2ps        -24(%ebp), %xmm0
        rsqrtps %xmm0, %xmm0
        cvtps2pd        %xmm0, %xmm0
        movapd %xmm0, -40(%ebp)
        movl   $0, %eax
        leave
        ret

I don't know what is the purpouse of marked operations on %eax...

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |4.0.0
            Summary|[3.4/4.0 Regression] ICE in |[3.4 Regression] ICE in
                   |simplify_binary_operation   |simplify_binary_operation


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18614