------- Additional Comments From steven at gcc dot gnu dot org 2005-01-21 12:51 ------- With my patch I get almost perfect code for amd64: .globl f .type f, @function f: .LFB2: decl %edi je .L6 movl r5(%rip), %r9d movl r4(%rip), %r8d xorl %r10d, %r10d movl r3(%rip), %esi movl r2(%rip), %ecx movl r0(%rip), %edx movl r1(%rip), %eax .p2align 4,,7 .L4: addl %edx, %eax incl %r10d addl %eax, %ecx addl %ecx, %esi addl %esi, %r8d addl %r8d, %r9d addl %r9d, %edx cmpl %r10d, %edi jne .L4 movl %r9d, r5(%rip) movl %r8d, r4(%rip) movl %esi, r3(%rip) movl %ecx, r2(%rip) movl %edx, r0(%rip) movl %eax, r1(%rip) .L6: rep ; ret
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19464