On Sun, Oct 4, 2026 at 9:08 AM Max Filippov <[email protected]> wrote: > > The commit r17-3780-ga5da203dd959 introduced a regression that results > in the following kind of ICE when DF mode value 0 is loaded into AR > registers: > > gcc/libgcc/libgcc2.c:2746:1: error: unrecognizable insn: > (insn 1401 775 1402 79 (set (reg:SF 12 a12) > (const_int 0 [0])) "gcc/libgcc/libgcc2.c":2719:8 -1 > (nil)) > during RTL pass: split2 > > This happens because the condition in the `move_fp_operand` that allows > matching 0 as a constant for auto litpool has been changed from > `CONSTANT_P` to `CONST_DOUBLE_P`, but the code that splits DF mode > constant 0 produces const_int. > > gcc/ > * config/xtensa/predicates.md (move_fp_operand): Use CONSTANT_P > instead of CONST_DOUBLE_P. > --- > gcc/config/xtensa/predicates.md | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-)
Regtested for target=xtensa-linux-uclibc, no new regressions. Committed to master. -- Thanks. -- Max
