gistfile1.txt

$ export PS1="Xeon L5630:\w$ "
Xeon L5630:~$ for i in 1 2; do gcc -O2 -Wall -Werror test$i.c -o test$i; done
Xeon L5630:~$ diff -u <(objdump -d test1) <(objdump -d test2)
--- /dev/fd/63  2015-09-15 15:06:00.529163166 +0900
+++ /dev/fd/62  2015-09-15 15:06:00.529163166 +0900
@@ -1,5 +1,5 @@

-test1:     file format elf64-x86-64
+test2:     file format elf64-x86-64


 Disassembly of section .init:
@@ -60,7 +60,7 @@
 0000000000400590 <main>:
   400590:      41 56                   push   %r14
   400592:      bf 00 00 00 10          mov    $0x10000000,%edi
-  400597:      41 be 00 00 10 00       mov    $0x100000,%r14d
+  400597:      41 be 00 01 00 00       mov    $0x100,%r14d
   40059d:      41 55                   push   %r13
   40059f:      41 54                   push   %r12
   4005a1:      55                      push   %rbp
@@ -70,8 +70,8 @@
   4005aa:      49 89 c4                mov    %rax,%r12
   4005ad:      ba 00 00 00 10          mov    $0x10000000,%edx
   4005b2:      be 0a 00 00 00          mov    $0xa,%esi
-  4005b7:      4d 8d ac 24 00 00 01    lea    0x10000(%r12),%r13
-  4005be:      00
+  4005b7:      4d 8d ac 24 00 00 00    lea    0x10000000(%r12),%r13
+  4005be:      10
   4005bf:      48 89 c7                mov    %rax,%rdi
   4005c2:      e8 69 ff ff ff          callq  400530 <memset@plt>
   4005c7:      66 0f 1f 84 00 00 00    nopw   0x0(%rax,%rax,1)
Xeon L5630:~$