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authorKirill Smelkov <kirr@navytux.spb.ru>2012-11-16 00:04:56 +0400
committerKirill Smelkov <kirr@navytux.spb.ru>2012-11-16 10:22:45 +0400
commitab24aaeca303abadd987c2a4ab3a56efe755c37c (patch)
treee7b682064790846ebc4203a6d7c54bdf0a2f5428 /tests2/42_function_pointer.c
parentb2a02961b4407ca76db5a66ca5ae855cbfba4e8e (diff)
downloadtinycc-ab24aaeca303abadd987c2a4ab3a56efe755c37c.tar.gz
tinycc-ab24aaeca303abadd987c2a4ab3a56efe755c37c.tar.bz2
i386: We can change 'lea 0(%ebp),r' to 'mov %ebp,r'
Because that mov is 1 byte shorter, look: int *func() { return __builtin_frame_address(0); } before patch: 00000000 <func>: 0: 55 push %ebp 1: 89 e5 mov %esp,%ebp 3: 81 ec 00 00 00 00 sub $0x0,%esp 9: 8d 45 00 lea 0x0(%ebp),%eax // <- here c: e9 00 00 00 00 jmp 11 <func+0x11> 11: c9 leave 12: c3 ret after patch: 00000000 <func>: 0: 55 push %ebp 1: 89 e5 mov %esp,%ebp 3: 81 ec 00 00 00 00 sub $0x0,%esp 9: 89 e8 mov %ebp,%eax // <- here b: e9 00 00 00 00 jmp 10 <func+0x10> 10: c9 leave 11: c3 ret
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