https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78438
--- Comment #7 from Segher Boessenkool ---
Author: segher
Date: Wed Nov 23 14:33:13 2016
New Revision: 242757
URL: https://gcc.gnu.org/viewcvs?rev=242757=gcc=rev
Log:
combine: Convert subreg-of-lshiftrt to zero_extract properly (PR78390)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78438
--- Comment #6 from Segher Boessenkool ---
n/m, too tired I guess, please ignore comment 5.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78438
--- Comment #5 from Segher Boessenkool ---
Why is this wrong? This isn't the same reg 94 (it is reused):
Failed to match this instruction:
(set (mem/c:QI (symbol_ref:DI ("a") [flags 0x2] )
[0 a+0 S1 A8])
(subreg:QI (ashiftrt:SI (reg:SI 93
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78438
Jeffrey A. Law changed:
What|Removed |Added
Priority|P3 |P1
CC|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78438
Jakub Jelinek changed:
What|Removed |Added
Status|ASSIGNED|NEW
--- Comment #4 from Jakub Jelinek
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78438
Jakub Jelinek changed:
What|Removed |Added
Status|NEW |ASSIGNED
--- Comment #3 from Jakub
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78438
--- Comment #2 from Jakub Jelinek ---
Before combine we have:
(insn 6 5 7 2 (parallel [
(set (reg:SI 92)
(ashiftrt:SI (reg:SI 93 [ b ])
(const_int 11 [0xb])))
(clobber (reg:CC 17
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78438
Jakub Jelinek changed:
What|Removed |Added
Status|UNCONFIRMED |NEW
Last reconfirmed|
