[Bug target/18562] SSE constant vector initialization produces dead constant values on stack

[uros at gcc dot gnu dot org]

------- Additional Comments From uros at gcc dot gnu dot org  2004-11-19 15:41 
-------
If val1 is moved out of the main() function, produced code is OK:

--cut here--
#include <xmmintrin.h>
#include <stdio.h>

float val1[4] = {1.3f, 1.4f, 1.5f, 1.6f};

int main(void) {
        float result[4];
        __m128 A;
...
--cut here--

val1:                          <- vector is merged this time
        .long   1067869798
        .long   1068708659
        .long   1069547520
        .long   1070386381
        .section        .rodata.str1.1,"aMS",@progbits,1
.LC0:
        .string "%f %f %f %f\n"
        .text
        .p2align 4,,15
.globl main
        .type   main, @function
main:
        pushl   %ebp
        movl    %esp, %ebp
        subl    $56, %esp
        andl    $-16, %esp
        movups  val1, %xmm0      <- loaded directy into xmm reg
        movups  %xmm0, -16(%ebp)
        subl    $16, %esp
        flds    -4(%ebp)
        ...

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18562