On 2/26/24 17:17, Greg McGary wrote:
The sign-bit-copies of a sign-extending load cannot be known until runtime on
WORD_REGISTER_OPERATIONS targets, except in the case of a zero-extending MEM
load. See the fix for PR112758.
2024-02-22 Greg McGary <g...@rivosinc.com>
PR rtl-optimization/113010
* combine.cc (simplify_comparison): Simplify a SUBREG on
WORD_REGISTER_OPERATIONS targets only if it is a zero-extending
MEM load.
* gcc.c-torture/execute/pr113010.c: New test.
I think this is fine for the trunk. I'll do some final testing on it
tomorrow.
Jeff
