https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78671
Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ra
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-12-04
CC| |vmakarov at gcc dot gnu.org
Component|target |rtl-optimization
Ever confirmed|0 |1
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Zdenek Sojka from comment #0)
> Created attachment 40241 [details]
> reduced testcase
>
> Compiler output:
> $ x86_64-pc-linux-gnu-gcc -Og -march=skylake-avx512 testcase.c
> testcase.c: In function 'foo':
> testcase.c:15:1: error: insn does not satisfy its constraints:
> }
> ^
> (insn 554 165 166 14 (set (reg:TI 44 r15 [orig:149 _84 ] [149])
> (reg:TI 40 r11 [orig:149 _84 ] [149])) "testcase.c":12 80
> {*movti_internal}
> (nil))
64bit r15 was allocated as a TImode register, and there is no r16 to form
TImode register pair.
