https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111818
--- Comment #7 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-11 branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:45c296f2d81f6259e268e07707b4aa87dffba20a commit r11-11142-g45c296f2d81f6259e268e07707b4aa87dffba20a Author: Richard Biener <rguent...@suse.de> Date: Mon Oct 16 12:50:46 2023 +0200 middle-end/111818 - failed DECL_NOT_GIMPLE_REG_P setting of volatile The following addresses a missed DECL_NOT_GIMPLE_REG_P setting of a volatile declared parameter which causes inlining to substitute a constant parameter into a context where its address is required. The main issue is in update_address_taken which clears DECL_NOT_GIMPLE_REG_P from the parameter but fails to rewrite it because is_gimple_reg returns false for volatiles. The following changes maybe_optimize_var to make the 1:1 correspondence between clearing DECL_NOT_GIMPLE_REG_P of a register typed decl and actually rewriting it to SSA. PR middle-end/111818 * tree-ssa.c (maybe_optimize_var): When clearing DECL_NOT_GIMPLE_REG_P always rewrite into SSA. * gcc.dg/torture/pr111818.c: New testcase. (cherry picked from commit ce55521bcd149fdc431f1d78e706b66d470210ae)
