------- Comment #10 from sandra at codesourcery dot com 2010-06-22 16:26 ------- It looks like this bug has been fixed by my proposed patch for PR42505:
http://gcc.gnu.org/ml/gcc-patches/2010-06/msg01920.html Applying that patch to r160755 gives: 00000000 <test>: 0: b570 push {r4, r5, r6, lr} 2: 4d0c ldr r5, [pc, #48] ; (34 <test+0x34>) 4: 1c04 adds r4, r0, #0 6: 6806 ldr r6, [r0, #0] 8: 447d add r5, pc a: e00f b.n 2c <test+0x2c> c: 6861 ldr r1, [r4, #4] e: 1c2b adds r3, r5, #0 10: 780a ldrb r2, [r1, #0] 12: 2a00 cmp r2, #0 14: d101 bne.n 1a <test+0x1a> 16: 4b08 ldr r3, [pc, #32] ; (38 <test+0x38>) 18: 447b add r3, pc 1a: 4808 ldr r0, [pc, #32] ; (3c <test+0x3c>) 1c: 1989 adds r1, r1, r6 1e: 4478 add r0, pc 20: 1c32 adds r2, r6, #0 22: f7ff fffe bl 0 <func> 26: 6823 ldr r3, [r4, #0] 28: 3b01 subs r3, #1 2a: 6023 str r3, [r4, #0] 2c: 6823 ldr r3, [r4, #0] 2e: 2b00 cmp r3, #0 30: daec bge.n c <test+0xc> 32: bd70 pop {r4, r5, r6, pc} 34: 00000028 .word 0x00000028 38: 0000001c .word 0x0000001c 3c: 0000001a .word 0x0000001a So, back down to 64 bytes of code, and no spills to stack. Assuming the PR42505 patch is approved, probably the only thing required to close this issue is checking in the additional test case. -- sandra at codesourcery dot com changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |sandra at codesourcery dot | |com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39839
