[Bug middle-end/29158] store merge optimization not done

["acahalan at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #2 from acahalan at gmail dot com  2006-11-29 05:09 -------
This hits it too. (example is PowerPC)

///////////////////
#include <string.h>

char *foo(char *buf)
{
 short temp;
 int temp1;

 *buf++=42;

 temp = 0xfeed;
 memcpy(buf, &temp, sizeof(temp));
 buf+=sizeof(temp);

 temp1 = 0x12345678;
 memcpy(buf, &temp1, sizeof(temp1));
 buf+=sizeof(temp1);

 temp1 = 0x12345678;
 memcpy(buf, &temp1, sizeof(temp1));
 buf+=sizeof(temp1);

 *buf++=42;

 return buf;
}
///////////////
foo:
        stwu 1,-32(1)
        lis 9,0x1234
        li 11,42
        li 0,-275
        ori 9,9,22136
        stb 11,11(3)
        stb 11,0(3)
        sth 0,1(3)
        stw 9,7(3)
        stw 9,3(3)
        addi 3,3,12
        addi 1,1,32
        blr


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29158