https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108790
--- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by David Faust <dfa...@gcc.gnu.org>: https://gcc.gnu.org/g:c348a717213b03c6661878934f197f4d261f0e56 commit r13-5989-gc348a717213b03c6661878934f197f4d261f0e56 Author: David Faust <david.fa...@oracle.com> Date: Tue Feb 14 11:23:01 2023 -0800 bpf: fix memory constraint of ldx/stx instructions [PR108790] In some cases where the target memory address for an ldx or stx instruction could be reduced to a constant, GCC could emit a malformed instruction like: ldxdw %r0,0 Rather than the expected form: ldxdw %rX, [%rY + OFFSET] This is due to the constraint allowing a const_int operand, which the output templates do not handle. Fix it by introducing a new memory constraint for the appropriate operands of these instructions, which is identical to 'm' except that it does not accept const_int. gcc/ PR target/108790 * config/bpf/constraints.md (q): New memory constraint. * config/bpf/bpf.md (zero_extendhidi2): Use it here. (zero_extendqidi2): Likewise. (zero_extendsidi2): Likewise. (*mov<MM:mode>): Likewise. gcc/testsuite/ PR target/108790 * gcc.target/bpf/ldxdw.c: New test.
