Turn HARD_REGNO_MODE_OK into a target hook

2017-09-04  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* target.def (hard_regno_mode_ok): New hook.
	* doc/tm.texi (HARD_REGNO_MODE_OK): Replace with...
	(TARGET_HARD_REGNO_MODE_OK): ...this.
	* doc/tm.texi.in: Regenerate.
	* hooks.h (hook_bool_uint_mode_true): Declare.
	* hooks.c (hook_bool_uint_mode_true): New function.
	* doc/md.texi: Refer to targetm.hard_regno_mode_ok instead of
	HARD_REGNO_MODE_OK.
	* genpreds.c (write_insn_preds_c): Add an include of target.h.
	* alias.c (init_alias_target): Use targetm.hard_regno_mode_ok
	instead of HARD_REGNO_MODE_OK.
	* caller-save.c: Include target.h.
	(reg_save_code): Use targetm.hard_regno_mode_ok instead of
	HARD_REGNO_MODE_OK.
	* combine.c (can_combine_p): Likewise.
	(combinable_i3pat): Likewise.
	(can_change_dest_mode): Likewise.
	* expr.c (init_expr_target): Likewise.
	(convert_move): Likewise.
	(convert_modes): Likewise.
	* ira.c (setup_prohibited_class_mode_regs): Likewise.
	(setup_prohibited_mode_move_regs): Likewise.
	* ira.h (target_ira): Likewise.
	* lra-assigns.c (find_hard_regno_for_1): Likewise.
	* lra-constraints.c (process_alt_operands): Likewise.
	(split_reg): Likewise.
	* recog.c (peep2_find_free_register): Likewise.
	* ree.c (combine_reaching_defs): Likewise.
	* regcprop.c (maybe_mode_change): Likewise.
	* reginfo.c (init_reg_sets_1): Likewise.
	(choose_hard_reg_mode): Likewise.
	(simplifiable_subregs): Likewise.
	* regrename.c (check_new_reg_p): Likewise.
	* reload.c (find_valid_class): Likewise.
	(find_valid_class_1): Likewise.
	(reload_inner_reg_of_subreg): Likewise.
	(push_reload): Likewise.
	(combine_reloads): Likewise.
	(find_dummy_reload): Likewise.
	(find_reloads): Likewise.
	* reload1.c (find_reg): Likewise.
	(set_reload_reg): Likewise.
	(allocate_reload_reg): Likewise.
	(choose_reload_regs): Likewise.
	(reload_adjust_reg_for_temp): Likewise.
	* rtlanal.c (subreg_size_offset_from_lsb): Likewise.
	(simplify_subreg_regno): Likewise.
	* sel-sched.c (init_regs_for_mode): Likewise.
	* varasm.c (make_decl_rtl): Likewise.
	* config/aarch64/aarch64.h (HARD_REGNO_MODE_OK): Delete.
	(MODES_TIEABLE_P): Use targetm.hard_regno_mode_ok instead of
	HARD_REGNO_MODE_OK.
	* config/aarch64/aarch64-protos.h (aarch64_hard_regno_mode_ok): Delete.
	* config/aarch64/aarch64.c (aarch64_hard_regno_mode_ok): Make static.
	(TARGET_HARD_REGNO_MODE_OK): Redefine.
	* config/alpha/alpha.h (HARD_REGNO_MODE_OK): Delete.
	* config/alpha/alpha.c (alpha_hard_regno_mode_ok): New function.
	(TARGET_HARD_REGNO_MODE_OK): Redefine.
	* config/arc/arc.h (arc_hard_regno_mode_ok): Delete.
	(arc_mode_class): Delete.
	(HARD_REGNO_MODE_OK): Delete.
	* config/arc/arc.c (TARGET_HARD_REGNO_MODE_OK): Redefine.
	(arc_hard_regno_mode_ok): Rename old array to...
	(arc_hard_regno_mode_ok_modes): ...this.
	(arc_conditional_register_usage): Update accordingly.
	(arc_mode_class): Make static.
	(arc_hard_regno_mode_ok): New function.
	* config/arm/arm.h (HARD_REGNO_MODE_OK): Delete.
	* config/arm/arm-protos.h (arm_hard_regno_mode_ok): Delete.
	* config/arm/arm.c (TARGET_HARD_REGNO_MODE_OK): Redefine.
	(arm_hard_regno_mode_ok): Make static.
	* config/arm/arm.md (movdi): Use targetm.hard_regno_mode_ok instead of
	HARD_REGNO_MODE_OK.
	* config/avr/avr-protos.h (avr_hard_regno_mode_ok): Delete.
	* config/avr/avr.h (HARD_REGNO_MODE_OK): Delete.
	* config/avr/avr.c (avr_hard_regno_mode_ok): Make static and
	return a bool.
	(TARGET_HARD_REGNO_MODE_OK): Redefine.
	* config/bfin/bfin-protos.h (hard_regno_mode_ok): Delete.
	* config/bfin/bfin.h (HARD_REGNO_MODE_OK): Delete.
	* config/bfin/bfin.c (hard_regno_mode_ok): Rename to...
	(bfin_hard_regno_mode_ok): ...this.  Make static and return a bool.
	(TARGET_HARD_REGNO_MODE_OK): Redefine.
	* config/bfin/predicates.md (valid_reg_operand): Use
	targetm.hard_regno_mode_ok instead of HARD_REGNO_MODE_OK.
	* config/c6x/c6x.h (HARD_REGNO_MODE_OK): Delete.
	* config/c6x/c6x.c (c6x_hard_regno_mode_ok): New function.
	(TARGET_HARD_REGNO_MODE_OK): Redefine.
	* config/cr16/cr16.h (HARD_REGNO_MODE_OK): Delete.
	* config/cr16/cr16-protos.h (cr16_hard_regno_mode_ok): Delete.
	* config/cr16/cr16.c (TARGET_HARD_REGNO_MODE_OK): Redefine.
	(cr16_hard_regno_mode_ok): Make static and return a bool.
	* config/cris/cris.h (HARD_REGNO_MODE_OK): Delete.
	* config/cris/cris.c (TARGET_HARD_REGNO_MODE_OK): Redefine.
	(cris_hard_regno_mode_ok): New function.
	* config/epiphany/epiphany.h (epiphany_hard_regno_mode_ok): Delete.
	(epiphany_mode_class): Delete.
	(HARD_REGNO_MODE_OK): Delete.
	* config/epiphany/epiphany-protos.h (hard_regno_mode_ok): Delete.
	* config/epiphany/epiphany.c (TARGET_HARD_REGNO_MODE_OK): Redefine.
	(hard_regno_mode_ok): Rename to...
	(epiphany_hard_regno_mode_ok): ...this.  Make static and return a bool.
	* config/fr30/fr30.h (HARD_REGNO_MODE_OK): Delete.
	* config/fr30/fr30.md: Refer to targetm.hard_regno_mode_ok instead of
	HARD_REGNO_MODE_OK.
	* config/frv/frv.h (HARD_REGNO_MODE_OK): Delete.
	* config/frv/frv-protos.h (frv_hard_regno_mode_ok): Delete.
	* config/frv/frv.c (TARGET_HARD_REGNO_MODE_OK): Redefine.
	(frv_hard_regno_mode_ok): Make static and return a bool.
	* config/frv/frv.md: Refer to targetm.hard_regno_mode_ok instead of
	HARD_REGNO_MODE_OK.
	* config/ft32/ft32.h (HARD_REGNO_MODE_OK): Delete.
	* config/h8300/h8300.h (HARD_REGNO_MODE_OK): Delete.
	* config/h8300/h8300-protos.h (h8300_hard_regno_mode_ok): Delete.
	* config/h8300/h8300.c (h8300_hard_regno_mode_ok): Make static
	and return a bool.
	(TARGET_HARD_REGNO_MODE_OK): Redefine.
	* config/i386/i386.h (HARD_REGNO_MODE_OK): Delete.
	* config/i386/i386-protos.h (ix86_hard_regno_mode_ok): Delete.
	* config/i386/i386.c (ix86_hard_regno_mode_ok): Make static and
	return a bool.
	(TARGET_HARD_REGNO_MODE_OK): Redefine.
	* config/ia64/ia64.h (HARD_REGNO_MODE_OK): Delete.
	* config/ia64/ia64.c (TARGET_HARD_REGNO_MODE_OK): Redefine.
	(ia64_hard_regno_mode_ok): New function.
	* config/iq2000/iq2000.h (HARD_REGNO_MODE_OK): Delete.
	* config/iq2000/iq2000.c (TARGET_HARD_REGNO_MODE_OK): Redefine.
	(iq2000_hard_regno_mode_ok): New function.
	* config/lm32/lm32.h (HARD_REGNO_MODE_OK): Delete.
	* config/lm32/lm32.c (TARGET_HARD_REGNO_MODE_OK): Redefine.
	(lm32_hard_regno_mode_ok): New function.
	* config/m32c/m32c.h (HARD_REGNO_MODE_OK): Delete.
	* config/m32c/m32c-protos.h (m32c_hard_regno_ok): Delete.
	* config/m32c/m32c.c (class_can_hold_mode): Use m32c_hard_regno_mode_ok
	instead of HARD_REGNO_MODE_OK.
	(m32c_hard_regno_ok): Rename to...
	(m32c_hard_regno_mode_ok): ...this.  Make static and return a bool.
	(m32c_cannot_change_mode_class): Update accordingly.
	(TARGET_HARD_REGNO_MODE_OK): Redefine.
	* config/m32r/m32r.h (m32r_hard_regno_mode_ok): Delete.
	(m32r_mode_class): Delete.
	(HARD_REGNO_MODE_OK): Delete.
	* config/m32r/m32r.c (TARGET_HARD_REGNO_MODE_OK): Redefine.
	(m32r_hard_regno_mode_ok): Rename to...
	(m32r_hard_regno_modes): ...this.
	(m32r_mode_class): Make static.
	(m32r_hard_regno_mode_ok): New function.
	* config/m68k/m68k.h (HARD_REGNO_MODE_OK): Delete.
	* config/m68k/m68k-protos.h (m68k_regno_mode_ok): Delete.
	* config/m68k/m68k.c (TARGET_HARD_REGNO_MODE_OK): Redefine.
	(m68k_hard_regno_mode_ok): Make static.
	* config/mcore/mcore.h (HARD_REGNO_MODE_OK): Delete.
	* config/mcore/mcore.c (TARGET_HARD_REGNO_MODE_OK): Redefine.
	(mcore_hard_regno_mode_ok): New function.
	* config/microblaze/microblaze.h (microblaze_hard_regno_mode_ok)
	(HARD_REGNO_MODE_OK): Delete.
	* config/microblaze/microblaze.c (microblaze_hard_regno_mode_ok):
	Rename to...
	(microblaze_hard_regno_mode_ok_p): ...this and make static.
	(microblaze_hard_regno_mode_ok): New function.
	(TARGET_HARD_REGNO_MODE_OK): Redefine.
	* config/mips/mips.h (HARD_REGNO_MODE_OK): Delete.
	(mips_hard_regno_mode_ok): Delete.
	* config/mips/mips.c (mips_hard_regno_mode_ok): Rename to...
	(mips_hard_regno_mode_ok_p): ...this and make static.
	(mips_hard_regno_mode_ok_p): Rename to...
	(mips_hard_regno_mode_ok_uncached): ...this.
	(mips_hard_regno_mode_ok): New function.
	(mips_class_max_nregs): Use mips_hard_regno_mode_ok instead
	of HARD_REGNO_MODE_OK.
	(mips_option_override): Update after above name changes.
	(TARGET_HARD_REGNO_MODE_OK): Redefine.
	* config/mmix/mmix.h (HARD_REGNO_MODE_OK): Delete.
	* config/mn10300/mn10300.h (HARD_REGNO_MODE_OK): Delete.
	* config/mn10300/mn10300-protos.h (mn10300_hard_regno_mode_ok): Delete.
	* config/mn10300/mn10300.c (mn10300_hard_regno_mode_ok): Make static.
	(TARGET_HARD_REGNO_MODE_OK): Redefine.
	* config/moxie/moxie.h (HARD_REGNO_MODE_OK): Delete.
	* config/msp430/msp430.h (HARD_REGNO_MODE_OK): Delete.
	* config/msp430/msp430-protos.h (msp430_hard_regno_mode_ok): Delete.
	* config/msp430/msp430.c (TARGET_HARD_REGNO_MODE_OK): Redefine.
	(msp430_hard_regno_mode_ok): Make static and return a bool.
	* config/nds32/nds32.h (HARD_REGNO_MODE_OK): Delete.
	* config/nds32/nds32-protos.h (nds32_hard_regno_mode_ok): Delete.
	* config/nds32/nds32.c (nds32_hard_regno_mode_ok): Make static
	and return a bool.
	(TARGET_HARD_REGNO_MODE_OK): Redefine.
	* config/nios2/nios2.h (HARD_REGNO_MODE_OK): Delete.
	* config/nvptx/nvptx.h (HARD_REGNO_MODE_OK): Delete.
	* config/pa/pa.h (MODES_TIEABLE_P): Update commentary.
	* config/pa/pa32-regs.h (HARD_REGNO_MODE_OK): Rename to...
	(PA_HARD_REGNO_MODE_OK): ...this
	* config/pa/pa64-regs.h (HARD_REGNO_MODE_OK): Rename to...
	(PA_HARD_REGNO_MODE_OK): ...this.
	* config/pa/pa.c (TARGET_HARD_REGNO_MODE_OK): Redefine.
	(pa_hard_regno_mode_ok): New function.
	* config/pdp11/pdp11.h (HARD_REGNO_MODE_OK): Delete.
	* config/pdp11/pdp11.c (TARGET_HARD_REGNO_MODE_OK): Redefine.
	(pdp11_hard_regno_mode_ok): New function.
	* config/powerpcspe/powerpcspe.h (HARD_REGNO_MODE_OK): Delete.
	* config/powerpcspe/powerpcspe-protos.h (rs6000_hard_regno_mode_ok_p):
	Delete.
	* config/powerpcspe/powerpcspe.c (rs6000_hard_regno_mode_ok_p):
	Make static.
	(TARGET_HARD_REGNO_MODE_OK): Redefine.
	(rs6000_hard_regno_mode_ok): Rename to...
	(rs6000_hard_regno_mode_ok_uncached): ...this.
	(rs6000_init_hard_regno_mode_ok): Update accordingly.
	(rs6000_hard_regno_mode_ok): New function.
	* config/riscv/riscv.h (HARD_REGNO_MODE_OK): Delete.
	* config/riscv/riscv-protos.h (riscv_hard_regno_mode_ok_p): Delete.
	* config/riscv/riscv.c (riscv_hard_regno_mode_ok_p): Rename to...
	(riscv_hard_regno_mode_ok): ...this and make static.
	(TARGET_HARD_REGNO_MODE_OK): Redefine.
	* config/rl78/rl78.h (HARD_REGNO_MODE_OK): Delete.
	* config/rl78/rl78-protos.h (rl78_hard_regno_mode_ok): Delete.
	* config/rl78/rl78.c (TARGET_HARD_REGNO_MODE_OK): Redefine.
	(rl78_hard_regno_mode_ok): Make static and return bool.
	* config/rs6000/rs6000.h (HARD_REGNO_MODE_OK): Delete.
	* config/rs6000/rs6000-protos.h (rs6000_hard_regno_mode_ok_p):
	Delete.
	* config/rs6000/rs6000.c (rs6000_hard_regno_mode_ok_p): Make static.
	(TARGET_HARD_REGNO_MODE_OK): Redefine.
	(rs6000_hard_regno_mode_ok): Rename to...
	(rs6000_hard_regno_mode_ok_uncached): ...this.
	(rs6000_init_hard_regno_mode_ok): Update accordingly.
	(rs6000_hard_regno_mode_ok): New function.
	* config/rx/rx.h (HARD_REGNO_MODE_OK): Delete.
	* config/rx/rx.c (rx_hard_regno_mode_ok): New function.
	(TARGET_HARD_REGNO_MODE_OK): Redefine.
	* config/s390/s390.h (HARD_REGNO_MODE_OK): Delete.
	* config/s390/s390-protos.h (s390_hard_regno_mode_ok): Delete.
	* config/s390/s390.c (s390_hard_regno_mode_ok): Make static.
	(TARGET_HARD_REGNO_MODE_OK): Redefine.
	* config/sh/sh.h (HARD_REGNO_MODE_OK): Delete.
	* config/sh/sh-protos.h (sh_hard_regno_mode_ok): Delete.
	* config/sh/sh.c (TARGET_HARD_REGNO_MODE_OK): Redefine.
	(sh_hard_regno_mode_ok): Make static.
	* config/sparc/constraints.md: Refer to targetm.hard_regno_mode_ok
	instead of HARD_REGNO_MODE_OK.
	* config/sparc/sparc.h (hard_regno_mode_classes): Delete.
	(sparc_mode_class): Delete.
	(HARD_REGNO_MODE_OK): Delete.
	* config/sparc/sparc.c (TARGET_HARD_REGNO_MODE_OK): Redefine.
	(hard_regno_mode_classes): Make static.
	(sparc_mode_class): Likewise.
	(sparc_hard_regno_mode_ok): New function.
	* config/spu/spu.h (HARD_REGNO_MODE_OK): Delete.
	* config/stormy16/stormy16.h (HARD_REGNO_MODE_OK): Delete.
	* config/stormy16/stormy16.c (xstormy16_hard_regno_mode_ok): New
	function.
	(TARGET_HARD_REGNO_MODE_OK): Redefine.
	* config/tilegx/tilegx.h (HARD_REGNO_MODE_OK): Delete.
	* config/tilepro/tilepro.h (HARD_REGNO_MODE_OK): Delete.
	* config/v850/v850.h (HARD_REGNO_MODE_OK): Delete.
	* config/v850/v850.c (v850_hard_regno_mode_ok): New function.
	(TARGET_HARD_REGNO_MODE_OK): Redefine.
	* config/vax/vax.h (HARD_REGNO_MODE_OK): Delete.
	* config/visium/visium.h (HARD_REGNO_MODE_OK): Delete.
	* config/visium/visium.c (TARGET_HARD_REGNO_MODE_OK): Redefine.
	(visium_hard_regno_mode_ok): New function.
	* config/visium/visium.md: Refer to targetm.hard_regno_mode_ok
	instead of HARD_REGNO_MODE_OK.
	* config/xtensa/xtensa.h (xtensa_hard_regno_mode_ok): Delete.
	(HARD_REGNO_MODE_OK): Delete.
	* config/xtensa/xtensa.c (xtensa_hard_regno_mode_ok): Rename to...
	(xtensa_hard_regno_mode_ok_p): ...this and make static.
	(xtensa_option_override): Update accordingly.
	(TARGET_HARD_REGNO_MODE_OK): Redefine.
	(xtensa_hard_regno_mode_ok): New function.
	* system.h (HARD_REGNO_MODE_OK): Poison.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>

From-SVN: r251646

1 files changed, 16 insertions, 4 deletions

diff --git a/gcc/config/pa/pa.c b/gcc/config/pa/pa.c
index 6783fe3..c3bc01e 100644
--- a/gcc/config/pa/pa.c
+++ b/gcc/config/pa/pa.c
@@ -198,6 +198,7 @@ static unsigned int pa_section_type_flags (tree, const char *, int);
 static bool pa_legitimate_address_p (machine_mode, rtx, bool);
 static bool pa_callee_copies (cumulative_args_t, machine_mode,
 			      const_tree, bool);
+static bool pa_hard_regno_mode_ok (unsigned int, machine_mode);
 
 /* The following extra sections are only used for SOM.  */
 static GTY(()) section *som_readonly_data_section;
@@ -404,6 +405,9 @@ static size_t n_deferred_plabels = 0;
 #undef TARGET_LRA_P
 #define TARGET_LRA_P hook_bool_void_false
 
+#undef TARGET_HARD_REGNO_MODE_OK
+#define TARGET_HARD_REGNO_MODE_OK pa_hard_regno_mode_ok
+
 struct gcc_target targetm = TARGET_INITIALIZER;
 
 /* Parse the -mfixed-range= option string.  */
@@ -9998,7 +10002,7 @@ pa_cannot_change_mode_class (machine_mode from, machine_mode to,
   if (MAYBE_FP_REG_CLASS_P (rclass))
     return true;
 
-  /* HARD_REGNO_MODE_OK places modes with sizes larger than a word
+  /* TARGET_HARD_REGNO_MODE_OK places modes with sizes larger than a word
      in specific sets of registers.  Thus, we cannot allow changing
      to a larger mode when it's larger than a word.  */
   if (GET_MODE_SIZE (to) > UNITS_PER_WORD
@@ -10010,13 +10014,13 @@ pa_cannot_change_mode_class (machine_mode from, machine_mode to,
 
 /* Returns TRUE if it is a good idea to tie two pseudo registers
    when one has mode MODE1 and one has mode MODE2.
-   If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
-   for any hard reg, then this must be FALSE for correct output.
+   If TARGET_HARD_REGNO_MODE_OK could produce different values for MODE1
+   and MODE2, for any hard reg, then this must be FALSE for correct output.
    
    We should return FALSE for QImode and HImode because these modes
    are not ok in the floating-point registers.  However, this prevents
    tieing these modes to SImode and DImode in the general registers.
-   So, this isn't a good idea.  We rely on HARD_REGNO_MODE_OK and
+   So, this isn't a good idea.  We rely on TARGET_HARD_REGNO_MODE_OK and
    CANNOT_CHANGE_MODE_CLASS to prevent these modes from being used
    in the floating-point registers.  */
 
@@ -10756,4 +10760,12 @@ pa_callee_copies (cumulative_args_t cum ATTRIBUTE_UNUSED,
   return !TARGET_CALLER_COPIES;
 }
 
+/* Implement TARGET_HARD_REGNO_MODE_OK.  */
+
+static bool
+pa_hard_regno_mode_ok (unsigned int regno, machine_mode mode)
+{
+  return PA_HARD_REGNO_MODE_OK (regno, mode);
+}
+
 #include "gt-pa.h"