https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
David <gccbugzilla at limegreensocks dot com> changed:
What |Removed |Added
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CC| |gccbugzilla@limegreensocks.
| |com
--- Comment #5 from David <gccbugzilla at limegreensocks dot com> ---
What's the status here? While there was a checkin (r203383 & r203384), this
sample code still does not work correctly (4.9.0 x86_64-w64-mingw32). The
fall-thru case works, but if the jump inside the asm is taken, eax does not get
set to zero when it clearly should.
My -O2 output is:
00000000004014e0 <foo>:
4014e0: test ecx,ecx
4014e2: mov DWORD PTR [rsp+0x10],edx
4014e6: jne 4014f3 <foo+0x13>
4014e8: bts DWORD PTR [rsp+0x10],0x1
4014ee: jb 401500 <foo+0x20>
4014f0: xor eax,eax
4014f2: ret
4014f3: mov eax,0xfffffffd
4014f8: nop DWORD PTR [rax+rax*1+0x0]
401500: repz ret
401502: data32 data32 data32 data32 nop WORD PTR cs:[rax+rax*1+0x0]
