[Bug lto/46319] LTO plugin test failures with --with-build-config=bootstrap-lto --with-plugin-ld=ld

["hjl.tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46319

--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> 2010-11-05 23:27:51 UTC ---
-fwhopr=jobserver -fuse-linker-plugin -frandom-seed=1 miscompiled
selfassign.so. It generated:

[hjl@gnu-32 stage1-gcc]$ nm selfassign.so | grep plugin_init
00000000000009aa T plugin_init
[hjl@gnu-32 stage1-gcc]$ 

0000000000009aa <check_operator_eq>:
 9aa:   90                      nop 
 9ab:   90                      nop 
 9ac:   90                      nop 
 9ad:   90                      nop 
 9ae:   90                      nop 
 9af:   90                      nop 

Everything seems wrong. With gold as plugin linker, I got

[hjl@scel-amdbar2 gcc]$ nm selfassign.so | grep plugin_init
00000000000020ac T plugin_init
[hjl@scel-amdbar2 gcc]$ 

00000000000020ac <plugin_init>:
    20ac:       41 57                   push   %r15
    20ae:       41 56                   push   %r14
    20b0:       41 55                   push   %r13
    20b2:       41 54                   push   %r12
    20b4:       55                      push   %rbp
    20b5:       53                      push   %rbx
    20b6:       48 83 ec 38             sub    $0x38,%rsp
    20ba:       48 89 f0                mov    %rsi,%rax
    20bd:       4c 8b 2f                mov    (%rdi),%r13
    20c0:       44 8b 67 10             mov    0x10(%rdi),%r12d
    20c4:       48 8b 6f 18             mov    0x18(%rdi),%rbp
    20c8:       48 8d 35 11 1c 00 00    lea    0x1c11(%rip),%rsi        # 3ce0