[Bug rtl-optimization/66087] Invalid narrowing of MEM with containing POST_INC

[law at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66087

--- Comment #5 from Jeffrey A. Law  ---
Interestingly enough it fails in a similar manner with LRA, but I agree that
avoiding this earlier in the pipeline is preferable.

[Bug rtl-optimization/66087] Invalid narrowing of MEM with containing POST_INC

[mikpelinux at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66087

--- Comment #4 from Mikael Pettersson  ---
Still miscompiled by gcc-10.0, 9.1, and 8.3 at -O1 and above.

[Bug rtl-optimization/66087] Invalid narrowing of MEM with containing POST_INC

[mikpelinux at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66087

Mikael Pettersson  changed:

   What|Removed |Added

 CC||mikpelinux at gmail dot com

--- Comment #3 from Mikael Pettersson  ---
Still miscompiled by gcc-8.0, 7.2, and 6.4.

[Bug rtl-optimization/66087] Invalid narrowing of MEM with containing POST_INC

[sch...@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66087

--- Comment #2 from Andreas Schwab  ---
I think combine should reject this.

[Bug rtl-optimization/66087] Invalid narrowing of MEM with containing POST_INC

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66087

--- Comment #1 from Andrew Pinski  ---
Good old allowing subreg of a mem as register operand before reload.