https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100704
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by H.J. Lu <h...@gcc.gnu.org>: https://gcc.gnu.org/g:967b46530234b4e6ad3983057705aea6c20a03c4 commit r12-1564-g967b46530234b4e6ad3983057705aea6c20a03c4 Author: H.J. Lu <hjl.to...@gmail.com> Date: Fri May 21 11:56:55 2021 -0700 Add a target calls hook: TARGET_PUSH_ARGUMENT 1. Replace PUSH_ARGS with a target calls hook, TARGET_PUSH_ARGUMENT, which takes an integer argument. When it returns true, push instructions will be used to pass outgoing arguments. If the argument is nonzero, it is the number of bytes to push and indicates the PUSH instruction usage is optional so that the backend can decide if PUSH instructions should be generated. Otherwise, the argument is zero. 2. Implement x86 target hook which returns false when the number of bytes to push is no less than 16 (8 for 32-bit targets) if vector load and store can be used. 3. Remove target PUSH_ARGS definitions which return 0 as it is the same as the default. 4. Define TARGET_PUSH_ARGUMENT of cr16 and m32c to always return true. gcc/ PR target/100704 * calls.c (expand_call): Replace PUSH_ARGS with targetm.calls.push_argument (0). (emit_library_call_value_1): Likewise. * defaults.h (PUSH_ARGS): Removed. (PUSH_ARGS_REVERSED): Replace PUSH_ARGS with targetm.calls.push_argument (0). * expr.c (block_move_libcall_safe_for_call_parm): Likewise. (emit_push_insn): Pass the number bytes to push to targetm.calls.push_argument and pass 0 if ARGS_ADDR is 0. * hooks.c (hook_bool_uint_true): New. * hooks.h (hook_bool_uint_true): Likewise. * rtlanal.c (nonzero_bits1): Replace PUSH_ARGS with targetm.calls.push_argument (0). * target.def (push_argument): Add a targetm.calls hook. * targhooks.c (default_push_argument): New. * targhooks.h (default_push_argument): Likewise. * config/bpf/bpf.h (PUSH_ARGS): Removed. * config/cr16/cr16.c (TARGET_PUSH_ARGUMENT): New. * config/cr16/cr16.h (PUSH_ARGS): Removed. * config/i386/i386.c (ix86_push_argument): New. (TARGET_PUSH_ARGUMENT): Likewise. * config/i386/i386.h (PUSH_ARGS): Removed. * config/m32c/m32c.c (TARGET_PUSH_ARGUMENT): New. * config/m32c/m32c.h (PUSH_ARGS): Removed. * config/nios2/nios2.h (PUSH_ARGS): Likewise. * config/pru/pru.h (PUSH_ARGS): Likewise. * doc/tm.texi.in: Remove PUSH_ARGS documentation. Add TARGET_PUSH_ARGUMENT hook. * doc/tm.texi: Regenerated. gcc/testsuite/ PR target/100704 * gcc.target/i386/pr100704-1.c: New test. * gcc.target/i386/pr100704-2.c: Likewise. * gcc.target/i386/pr100704-3.c: Likewise.
