Turn SECONDARY_MEMORY_NEEDED into a hook

Since the patch is going through all the definitions anyway, it seemed
like a good opportunity to put the mode argument first, to match the
order for register_move_cost.

2017-09-13  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* target.def (secondary_memory_needed): New hook.
	(secondary_reload): Refer to TARGET_SECONDARY_MEMORY_NEEDED
	instead of SECONDARY_MEMORY_NEEDED.
	(secondary_memory_needed_mode): Likewise.
	* hooks.h (hook_bool_mode_reg_class_t_reg_class_t_false): Declare.
	* hooks.c (hook_bool_mode_reg_class_t_reg_class_t_false): New function.
	* doc/tm.texi.in (SECONDARY_MEMORY_NEEDED): Replace with...
	(TARGET_SECONDARY_MEMORY_NEEDED): ...this.
	(SECONDARY_MEMORY_NEEDED_RTX): Update reference accordingly.
	* doc/tm.texi: Regenerate.
	* config/alpha/alpha.h (SECONDARY_MEMORY_NEEDED): Delete.
	* config/alpha/alpha.c (alpha_secondary_memory_needed): New function.
	(TARGET_SECONDARY_MEMORY_NEEDED): Redefine.
	* config/i386/i386.h (SECONDARY_MEMORY_NEEDED): Delete.
	* config/i386/i386-protos.h (ix86_secondary_memory_needed): Delete.
	* config/i386/i386.c (inline_secondary_memory_needed): Put the
	mode argument first and change the reg_class arguments to reg_class_t.
	(ix86_secondary_memory_needed): Likewise.  Remove the strict parameter.
	Make static.  Update the call to inline_secondary_memory_needed.
	(ix86_register_move_cost): Update the call to
	inline_secondary_memory_needed.
	(TARGET_SECONDARY_MEMORY_NEEDED): Redefine.
	* config/ia64/ia64.h (SECONDARY_MEMORY_NEEDED): Delete commented-out
	definition.
	* config/ia64/ia64.c (spill_xfmode_rfmode_operand): Refer to
	TARGET_SECONDARY_MEMORY_NEEDED rather than SECONDARY_MEMORY_NEEDED
	in comment.
	* config/mips/mips.h (SECONDARY_MEMORY_NEEDED): Delete.
	* config/mips/mips-protos.h (mips_secondary_memory_needed): Delete.
	* config/mips/mips.c (mips_secondary_memory_needed): Make static
	and match hook interface.  Add comment from mips.h.
	(TARGET_SECONDARY_MEMORY_NEEDED): Redefine.
	* config/mmix/mmix.md (truncdfsf2): Refer to
	TARGET_SECONDARY_MEMORY_NEEDED rather than SECONDARY_MEMORY_NEEDED
	in comment.
	* config/pa/pa-64.h (SECONDARY_MEMORY_NEEDED): Rename to...
	(PA_SECONDARY_MEMORY_NEEDED): ...this, and put the mode argument first.
	* config/pa/pa.c (TARGET_SECONDARY_MEMORY_NEEDED): Redefine.
	(pa_secondary_memory_needed): New function.
	* config/pdp11/pdp11.h (SECONDARY_MEMORY_NEEDED): Delete.
	* config/pdp11/pdp11-protos.h (pdp11_secondary_memory_needed): Delete.
	* config/pdp11/pdp11.c (TARGET_SECONDARY_MEMORY_NEEDED): Redefine.
	(pdp11_secondary_memory_needed): Make static and match hook interface.
	* config/powerpcspe/powerpcspe.h (SECONDARY_MEMORY_NEEDED): Delete.
	* config/powerpcspe/powerpcspe-protos.h
	(rs6000_secondary_memory_needed_ptr): Delete.
	* config/powerpcspe/powerpcspe.c (rs6000_secondary_memory_needed_ptr):
	Delete.
	(TARGET_SECONDARY_MEMORY_NEEDED): Redefine.
	(rs6000_option_override_internal): Assign to
	targetm.secondary_memory_needed rather than
	rs6000_secondary_memory_needed_ptr.
	(rs6000_secondary_memory_needed): Match hook interface.
	(rs6000_debug_secondary_memory_needed): Likewise.
	* config/riscv/riscv.h (SECONDARY_MEMORY_NEEDED): Delete.
	* config/riscv/riscv.c (riscv_secondary_memory_needed): New function.
	(riscv_register_move_cost): Use it instead of SECONDARY_MEMORY_NEEDED.
	(TARGET_SECONDARY_MEMORY_NEEDED): Redefine.
	* config/rs6000/rs6000.h (SECONDARY_MEMORY_NEEDED): Delete.
	* config/rs6000/rs6000-protos.h (rs6000_secondary_memory_needed_ptr):
	Delete.
	* config/rs6000/rs6000.c (rs6000_secondary_memory_needed_ptr): Delete.
	(TARGET_SECONDARY_MEMORY_NEEDED): Redefine.
	(rs6000_option_override_internal): Assign to
	targetm.secondary_memory_needed rather than
	rs6000_secondary_memory_needed_ptr.
	(rs6000_secondary_memory_needed): Match hook interface.
	(rs6000_debug_secondary_memory_needed): Likewise.
	* config/s390/s390.h (SECONDARY_MEMORY_NEEDED): Delete.
	* config/s390/s390.c (s390_secondary_memory_needed): New function.
	(TARGET_SECONDARY_MEMORY_NEEDED): Redefine.
	* config/sparc/sparc.h (SECONDARY_MEMORY_NEEDED): Delete.
	* config/sparc/sparc.c (TARGET_SECONDARY_MEMORY_NEEDED): Redefine.
	(sparc_secondary_memory_needed): New function.
	* lra-constraints.c (check_and_process_move): Refer to
	TARGET_SECONDARY_MEMORY_NEEDED rather than SECONDARY_MEMORY_NEEDED
	in comment.
	(curr_insn_transform): Likewise.
	(process_alt_operands): Use targetm.secondary_memory_needed
	instead of TARGET_SECONDARY_MEMORY_NEEDED.
	(check_secondary_memory_needed_p): Likewise.
	(choose_split_class): Likewise.
	* reload.c: Unconditionally include code that was previously
	conditional on SECONDARY_MEMORY_NEEDED.
	(push_secondary_reload): Use targetm.secondary_memory_needed
	instead of TARGET_SECONDARY_MEMORY_NEEDED.
	(push_reload): Likewise.
	* reload1.c: Unconditionally include code that was previously
	conditional on SECONDARY_MEMORY_NEEDED.
	(choose_reload_regs): Use targetm.secondary_memory_needed
	instead of TARGET_SECONDARY_MEMORY_NEEDED.
	(gen_reload): Likewise.
	* system.h (SECONDARY_MEMORY_NEEDED): Poison.

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

From-SVN: r252461

1 files changed, 6 insertions, 4 deletions

diff --git a/gcc/config/pdp11/pdp11.c b/gcc/config/pdp11/pdp11.c
index fd50e6a..5364b47 100644
--- a/gcc/config/pdp11/pdp11.c
+++ b/gcc/config/pdp11/pdp11.c
@@ -243,6 +243,9 @@ static bool pdp11_scalar_mode_supported_p (scalar_mode);
 
 #undef  TARGET_MODES_TIEABLE_P
 #define TARGET_MODES_TIEABLE_P pdp11_modes_tieable_p
+
+#undef  TARGET_SECONDARY_MEMORY_NEEDED
+#define TARGET_SECONDARY_MEMORY_NEEDED pdp11_secondary_memory_needed
 
 /* A helper function to determine if REGNO should be saved in the
    current function's stack frame.  */
@@ -1453,14 +1456,13 @@ pdp11_secondary_reload (bool in_p ATTRIBUTE_UNUSED,
   return LOAD_FPU_REGS;
 }
 
-/* Target routine to check if register to register move requires memory.
+/* Implement TARGET_SECONDARY_MEMORY_NEEDED.
 
    The answer is yes if we're going between general register and FPU 
    registers.  The mode doesn't matter in making this check.
 */
-bool 
-pdp11_secondary_memory_needed (reg_class_t c1, reg_class_t c2, 
-			       machine_mode mode ATTRIBUTE_UNUSED)
+static bool
+pdp11_secondary_memory_needed (machine_mode, reg_class_t c1, reg_class_t c2)
 {
   int fromfloat = (c1 == LOAD_FPU_REGS || c1 == NO_LOAD_FPU_REGS || 
 		   c1 == FPU_REGS);