https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99725
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-11 branch has been updated by Alex Coplan <acop...@gcc.gnu.org>: https://gcc.gnu.org/g:4290ac957ce13ab6097acda4b23cfd6ecf60b782 commit r11-8472-g4290ac957ce13ab6097acda4b23cfd6ecf60b782 Author: Alex Coplan <alex.cop...@arm.com> Date: Tue May 11 13:11:09 2021 +0100 arm: Avoid emitting bogus CFA adjusts for CMSE nonsecure calls [PR99725] The PR shows us attaching REG_CFA_ADJUST_CFA notes to stack pointer adjustments emitted in cmse_nonsecure_call_inline_register_clear (when -march=armv8.1-m.main). However, the stack pointer is not guaranteed to be the CFA reg. If we're at -O0 or we have -fno-omit-frame-pointer, then the frame pointer will be used as the CFA reg, and these notes on the sp adjustments will lead to ICEs in dwarf2out_frame_debug_adjust_cfa. This patch avoids emitting these notes if the current function has a frame pointer. gcc/ChangeLog: PR target/99725 * config/arm/arm.c (cmse_nonsecure_call_inline_register_clear): Avoid emitting CFA adjusts on the sp if we have the fp. gcc/testsuite/ChangeLog: PR target/99725 * gcc.target/arm/cmse/pr99725.c: New test. (cherry picked from commit 2ac1f0eb3887335b7a7e845812956fa436e72a91)
