c348a71721
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.
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