https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119664
--- Comment #6 from GCC 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:4203060a73e65e4fa3e091b060a973c3296b84e9 commit r15-9345-g4203060a73e65e4fa3e091b060a973c3296b84e9 Author: Jakub Jelinek <ja...@redhat.com> Date: Wed Apr 9 22:00:35 2025 +0200 h8300: Fix up bit test and jump splitter [PR119664] r12-2601 has added this define_insn_and_split and corresponding (define_insn "" [(set (reg:CCZ CC_REG) (eq (zero_extract:HSI (match_operand:HSI 0 "register_operand" "r") (const_int 1) (match_operand 1 "const_int_operand" "n")) (const_int 0)))] "INTVAL (operands[1]) < 16" "btst %Z1,%Y0" [(set_attr "length" "2")]) pattern into which the define_insn_and_split wants to splut in addition to a conditional jump. But as can be seen, the btst define_insn uses HSI mode iterator while define_insn_and_split QHSI, so for QImode it splits into something that can't be recognized. This was probably latent since r12-2601 and on the attached testcase is reproduceable starting with r15-1945 - a late combiner change. 2025-04-09 Jakub Jelinek <ja...@redhat.com> PR target/119664 * config/h8300/jumpcall.md (bit test and jump define_insn_and_split): Use HSI iterator rather than QHSI. * gcc.dg/pr119664.c: New test.
