https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98603
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:16dae48e9cd0421106517fc657c8743a14468945 commit r11-6562-g16dae48e9cd0421106517fc657c8743a14468945 Author: Jakub Jelinek <ja...@redhat.com> Date: Sat Jan 9 10:48:20 2021 +0100 vregs: Fix up instantiate_virtual_regs_in_insn for asm goto with outputs [PR98603] If an asm insn fails constraint checking during vregs, it is just deleted. We don't delete asm goto though because of the edges to the labels, so instantiate_virtual_regs_in_insn would just remove the inputs and their constraints, the pattern etc. This worked fine when asm goto couldn't have output operands, but causes ICEs later on when it has more than one output (and furthermore doesn't really remove the problematic outputs). The problem is that for multiple outputs we have a PARALLEL with multiple ASM_OPERANDS, but those must use the same ASM_OPERANDS_INPUT_VEC etc., but the code was adjusting just one. The following patch turns invalid asm goto into a bare asm goto ("" : : : : lab, lab2, lab3); i.e. no inputs/outputs/clobbers, just the labels. 2021-01-09 Jakub Jelinek <ja...@redhat.com> PR rtl-optimization/98603 * function.c (instantiate_virtual_regs_in_insn): For asm goto with impossible constraints, drop all SETs, CLOBBERs, drop PARALLEL if any, set ASM_OPERANDS mode to VOIDmode and change ASM_OPERANDS_OUTPUT_CONSTRAINT and ASM_OPERANDS_OUTPUT_IDX. * gcc.target/i386/pr98603.c: New test. * gcc.target/aarch64/pr98603.c: New test.
