https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58066
--- Comment #14 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Uroš Bizjak from comment #13)
> Patch in testing.
This patch fixes the testcase, now we get:
0000000000000000 <inet_ntoa>:
0: 41 56 push %r14
2: 41 55 push %r13
4: 44 0f b6 ef movzbl %dil,%r13d
8: 41 54 push %r12
a: 55 push %rbp
b: 41 89 fc mov %edi,%r12d
e: 53 push %rbx
f: 89 fb mov %edi,%ebx
11: 41 c1 ec 10 shr $0x10,%r12d
15: 0f b6 c7 movzbl %bh,%eax
18: c1 eb 18 shr $0x18,%ebx
1b: 45 0f b6 e4 movzbl %r12b,%r12d
1f: 41 89 c6 mov %eax,%r14d
22: 48 8d 3d 00 00 00 00 lea 0(%rip),%rdi # 29
<inet_ntoa+0x29>
25: R_X86_64_TLSLD buffer+0xfffffffffffffffc
29: e8 00 00 00 00 callq 2e <inet_ntoa+0x2e>
2a: R_X86_64_PLT32
__tls_get_addr+0xfffffffffffffffc
2e: 48 83 ec 08 sub $0x8,%rsp
32: 48 8d 15 00 00 00 00 lea 0(%rip),%rdx # 39
<inet_ntoa+0x39>
35: R_X86_64_PC32 .LC0+0xfffffffffffffffc
39: 45 89 e1 mov %r12d,%r9d
3c: 48 8d a8 00 00 00 00 lea 0x0(%rax),%rbp
3f: R_X86_64_DTPOFF32 buffer
43: 53 push %rbx
44: 45 89 f0 mov %r14d,%r8d
47: 44 89 e9 mov %r13d,%ecx
4a: 31 c0 xor %eax,%eax
4c: be 12 00 00 00 mov $0x12,%esi
51: 48 89 ef mov %rbp,%rdi
54: e8 00 00 00 00 callq 59 <inet_ntoa+0x59>
55: R_X86_64_PLT32 __snprintf+0xfffffffffffffffc
59: 58 pop %rax
5a: 48 89 e8 mov %rbp,%rax
5d: 5a pop %rdx
5e: 5b pop %rbx
5f: 5d pop %rbp
60: 41 5c pop %r12
62: 41 5d pop %r13
64: 41 5e pop %r14
66: c3 retq
The difference between patched (+++) and unpatched (---) code is:
--- pr58066_.s 2015-07-13 11:58:23.000000000 +0200
+++ pr58066.s 2015-07-13 11:58:26.000000000 +0200
@@ -28,16 +28,16 @@
movzbl %bh, %eax
shrl $24, %ebx
movzbl %r12b, %r12d
- subq $8, %rsp
-.LCFI5:
movl %eax, %r14d
leaq buffer@tlsld(%rip), %rdi
call __tls_get_addr@PLT
- pushq %rbx
-.LCFI6:
+ subq $8, %rsp
+.LCFI5:
leaq .LC0(%rip), %rdx
movl %r12d, %r9d
leaq buffer@dtpoff(%rax), %rbp
+ pushq %rbx
+.LCFI6:
movl %r14d, %r8d
movl %r13d, %ecx
xorl %eax, %eax
HJ, can you please test the patch if it fixes your problem?
