https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106708
--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jiu Fu Guo <guoji...@gcc.gnu.org>: https://gcc.gnu.org/g:97a8e88cd7d22562c0ea4f73687d3c93c21e12fb commit r13-4771-g97a8e88cd7d22562c0ea4f73687d3c93c21e12fb Author: Jiufu Guo <guoji...@linux.ibm.com> Date: Mon Dec 19 16:40:01 2022 +0800 rs6000: use li;x?oris to build constant For constant C: If '(c & 0xFFFFFFFF00008000ULL) == 0xFFFFFFFF00008000ULL' or say: 32(1) || 16(x) || 1(1) || 15(x), using "li; xoris" would be ok. If '(c & 0xFFFFFFFF80008000ULL) == 0x80000000ULL' or say: 32(0) || 1(1) || 15(x) || 1(0) || 15(x), we could use "li; oris" to build constant 'C'. Here N(M) means N continuous bit M, x for M means it is ok for either 1 or 0; '||' means concatenation. This patch update rs6000_emit_set_long_const to support those constants. PR target/106708 gcc/ChangeLog: * config/rs6000/rs6000.cc (rs6000_emit_set_long_const): Add using "li; x?oris" to build constant. gcc/testsuite/ChangeLog: * gcc.target/powerpc/pr106708.c: New test.
