https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87376
--- Comment #8 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Georg-Johann Lay <g...@gcc.gnu.org>: https://gcc.gnu.org/g:23a0935262d6817097406578b1c70563f424804b commit r15-1860-g23a0935262d6817097406578b1c70563f424804b Author: Georg-Johann Lay <a...@gjlay.de> Date: Fri Jul 5 13:22:12 2024 +0200 AVR: target/87376 - Use nop_general_operand for DImode inputs. The avr-dimode.md expanders have code like emit_move_insn(acc_a, operands[1]) where acc_a is a hard register and operands[1] might be a non-generic address-space memory reference. Such loads may clobber hard regs since some of them are implemented as libgcc calls /and/ 64-moves are expanded as eight byte-moves, so that acc_a or acc_b might be clobbered by such a load. This patch simply denies non-generic address-space references by using nop_general_operand for all avr-dimode.md input predicates. With the patch, all memory loads that require library calls are issued before the expander codes from avr-dimode.md are run. PR target/87376 gcc/ * config/avr/avr-dimode.md: Use "nop_general_operand" instead of "general_operand" as predicate for all input operands. gcc/testsuite/ * gcc.target/avr/torture/pr87376.c: New test.
