https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84251
Richard Biener changed:
What|Removed |Added
Priority|P3 |P2
--- Comment #6 from Richard Biener
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84251
--- Comment #5 from Uroš Bizjak ---
(In reply to Jakub Jelinek from comment #2)
> This changed with r254167.
Please see PR 82692, comment #4. We need UNSPECs as an alternative to CCFPUmode
to prevent combine from changing CCFPUmode to CCFPmode.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84251
--- Comment #4 from Uroš Bizjak ---
cse1 pass of gcc-7 converts several insns (15,16,19,24) in BB4 from:
12: L12:
13: NOTE_INSN_BASIC_BLOCK 4
14: flags:CCFPU=cmp(r89:DF,r90:DF)
15: r96:QI=ordered(flags:CCFPU,0)
16: r95:SI=zero_ext
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84251
--- Comment #3 from Jakub Jelinek ---
Testcase without headers:
int
cmp (double a, double b)
{
if (__builtin_isnan (a) || __builtin_isnan (b))
__builtin_abort ();
return a == b;
}
In *.optimized we have:
if (a_2(D) unord b_3(D))
g
