[Bug target/105122] [12 Regression] Testsuite failures since r12-7931 on i686-linux

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105122

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2022-04-01
     Ever confirmed|0                           |1
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org
           Keywords|                            |missed-optimization
             Target|                            |i?86-*-*

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I will have a look.

+FAIL: gcc.dg/memcpy-6.c  (test for warnings, line 25)
+FAIL: gcc.dg/memcpy-6.c scan-tree-dump-not optimized "memcpy"
+FAIL: gcc.dg/memcpy-6.c scan-tree-dump-not optimized "memmove"

fold_copy_8 and fold_move_8 are no longer folded, that's to be expected with
MOVE_MAX and DImode types not being involved directly.  The r12-3482 change
would have newly folded those.  fold_move_8 is also not expanded inline
by RTL expansion.  GCC 11 seems to fold both.

The gcc.dg/ipa/remref-7.c one is probably spurious (it's a new testcase).