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m68hc11.h (HARD_REGNO_RENAME_OK): Define. 

* config/m68hc11/m68hc11.h (HARD_REGNO_RENAME_OK): Define.
	* config/m68hc11/m68hc11-protos.h (m68hc11_hard_regno_rename_ok):
	Declare.
	* config/m68hc11/m68hc11.c (m68hc11_hard_regno_rename_ok): New function
	for reg rename optimization to avoid using Z and Y registers.

From-SVN: r64134
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Stephane Carrez 2003-03-10 23:10:37 +01:00 committed by Stephane Carrez
parent 70f0e2883a
commit 2d8d15b762
4 changed files with 32 additions and 0 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2003-03-10 Stephane Carrez <stcarrez@nerim.fr>
* config/m68hc11/m68hc11.h (HARD_REGNO_RENAME_OK): Define.
* config/m68hc11/m68hc11-protos.h (m68hc11_hard_regno_rename_ok):
Declare.
* config/m68hc11/m68hc11.c (m68hc11_hard_regno_rename_ok): New function
for reg rename optimization to avoid using Z and Y registers.
2003-03-10 Stephane Carrez <stcarrez@nerim.fr> 2003-03-10 Stephane Carrez <stcarrez@nerim.fr>
* config/m68hc11/m68hc11.md ("*addhi3_68hc12"): Accept any constant * config/m68hc11/m68hc11.md ("*addhi3_68hc12"): Accept any constant

1
gcc/config/m68hc11/m68hc11-protos.h
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@ -24,6 +24,7 @@ extern int m68hc11_override_options PARAMS((void));
extern int m68hc11_optimization_options PARAMS((int,int)); extern int m68hc11_optimization_options PARAMS((int,int));
extern void m68hc11_conditional_register_usage PARAMS((void)); extern void m68hc11_conditional_register_usage PARAMS((void));
extern int hard_regno_mode_ok PARAMS((int, enum machine_mode)); extern int hard_regno_mode_ok PARAMS((int, enum machine_mode));
extern int m68hc11_hard_regno_rename_ok PARAMS((int, int));
extern int m68hc11_total_frame_size PARAMS((void)); extern int m68hc11_total_frame_size PARAMS((void));
extern int m68hc11_initial_frame_pointer_offset PARAMS((void)); extern int m68hc11_initial_frame_pointer_offset PARAMS((void));

17
gcc/config/m68hc11/m68hc11.c
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@ -394,6 +394,23 @@ hard_regno_mode_ok (regno, mode)
} }
} }
int
m68hc11_hard_regno_rename_ok (reg1, reg2)
int reg1, reg2;
{
/* Don't accept renaming to Z register. We will replace it to
X,Y or D during machine reorg pass. */
if (reg2 == HARD_Z_REGNUM)
return 0;
/* Don't accept renaming D,X to Y register as the code will be bigger. */
if (TARGET_M6811 && reg2 == HARD_Y_REGNUM
&& (D_REGNO_P (reg1) || X_REGNO_P (reg1)))
return 0;
return 1;
}
enum reg_class enum reg_class
preferred_reload_class (operand, class) preferred_reload_class (operand, class)
rtx operand; rtx operand;

6
gcc/config/m68hc11/m68hc11.h
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@ -801,6 +801,12 @@ extern enum reg_class m68hc11_tmp_regs_class;
#define SMALL_REGISTER_CLASSES 1 #define SMALL_REGISTER_CLASSES 1
/* A C expression that is nonzero if hard register number REGNO2 can be
considered for use as a rename register for REGNO1 */
#define HARD_REGNO_RENAME_OK(REGNO1,REGNO2) \
m68hc11_hard_regno_rename_ok ((REGNO1), (REGNO2))
/* A C expression whose value is nonzero if pseudos that have been /* A C expression whose value is nonzero if pseudos that have been
assigned to registers of class CLASS would likely be spilled assigned to registers of class CLASS would likely be spilled
because registers of CLASS are needed for spill registers. because registers of CLASS are needed for spill registers.