[Bug inline-asm/11203] source doesn't compile with -O0 but they compile with -O3

["pluto at pld-linux dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From pluto at pld-linux dot org  2004-08-15 11:00 -------
confirmed with 3.4.2-20040806 (-O0 works, -O[123] fails). 
 
ps). building qemu-0.5.5 also fails. 
 
pentium3-pld-linux-gcc -O2 -march=pentium3 --save-temps -fomit-frame-pointer 
-mpreferred-stack-boundary=2 -falign-functions=0 -fno-reorder-blocks 
-fno-optimize-sibling-calls -I. 
-I/home/users/pluto/rpm/BUILD/qemu-0.5.5/target-i386 
-I/home/users/pluto/rpm/BUILD/qemu-0.5.5 -D_GNU_SOURCE 
-c -o op.o /home/users/pluto/rpm/BUILD/qemu-0.5.5/target-i386/op.c 
/home/users/pluto/rpm/BUILD/qemu-0.5.5/target-i386/ops_template_mem.h: 
In function `op_rolb_kernel_T0_T1_cc': 
/home/users/pluto/rpm/BUILD/qemu-0.5.5/softmmu_header.h:179: 
error: can't find a register in class `GENERAL_REGS' while reloading `asm' 
 
 
static inline void glue(glue(st, SUFFIX), MEMSUFFIX)(void *ptr, RES_TYPE v) 
{ 
    asm volatile ("movl %0, %%edx\n"                 / * line 179 */ 
                  "movl %0, %%eax\n" 
                  "shrl %3, %%edx\n" 
                  "andl %4, %%eax\n" 
                  "andl %2, %%edx\n" 
                  "leal %5(%%edx, %%ebp), %%edx\n" 
                  "cmpl (%%edx), %%eax\n" 
                  "movl %0, %%eax\n" 
                  "je 1f\n" 
#if DATA_SIZE == 1 
                  "movzbl %b1, %%edx\n" 
#elif DATA_SIZE == 2 
                  "movzwl %w1, %%edx\n" 
#elif DATA_SIZE == 4 
                  "movl %1, %%edx\n" 
#else 
#error unsupported size 
#endif 
                  "pushl %6\n" 
                  "call %7\n" 
                  "popl %%eax\n" 
                  "jmp 2f\n" 
                  "1:\n" 
                  "addl 4(%%edx), %%eax\n" 
#if DATA_SIZE == 1 
                  "movb %b1, (%%eax)\n" 
#elif DATA_SIZE == 2 
                  "movw %w1, (%%eax)\n" 
#elif DATA_SIZE == 4 
                  "movl %1, (%%eax)\n" 
#else 
#error unsupported size 
#endif 
                  "2:\n" 
                  : 
                  : "r" (ptr), 
/* NOTE: 'q' would be needed as constraint, but we could not use it 
   with T1 ! */ 
                  "r" (v), 
                  "i" ((CPU_TLB_SIZE - 1) << 3), 
                  "i" (TARGET_PAGE_BITS - 3), 
                  "i" (TARGET_PAGE_MASK | (DATA_SIZE - 1)), 
                  "m" (*(uint32_t *)offsetof(CPUState, 
tlb_write[CPU_MEM_INDEX][0].address)), 
                  "i" (CPU_MEM_INDEX), 
                  "m" (*(uint8_t *)&glue(glue(__st, SUFFIX), MMUSUFFIX)) 
                  : "%eax", "%ecx", "%edx", "memory", "cc"); 
} 
 
 

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11203