https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108086
--- Comment #22 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-11 branch has been updated by Richard Sandiford <rsand...@gcc.gnu.org>: https://gcc.gnu.org/g:66d01cc3f4a248ccc471a978f0bfe3615c3f3a30 commit r11-11467-g66d01cc3f4a248ccc471a978f0bfe3615c3f3a30 Author: Richard Sandiford <richard.sandif...@arm.com> Date: Tue Jun 4 13:47:35 2024 +0100 rtl-ssa: Extend m_num_defs to a full unsigned int [PR108086] insn_info tried to save space by storing the number of definitions in a 16-bit bitfield. The justification was: // ... FIRST_PSEUDO_REGISTER + 1 // is the maximum number of accesses to hard registers and memory, and // MAX_RECOG_OPERANDS is the maximum number of pseudos that can be // defined by an instruction, so the number of definitions should fit // easily in 16 bits. But while that reasoning holds (I think) for real instructions, it doesn't hold for artificial instructions. I don't think there's any sensible higher limit we can use, so this patch goes for a full unsigned int. gcc/ PR rtl-optimization/108086 * rtl-ssa/insns.h (insn_info): Make m_num_defs a full unsigned int. Adjust size-related commentary accordingly. (cherry picked from commit cd41085a37b8288dbdfe0f81027ce04b978578f1)
