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| author | Stephane Carrez <stcarrez@nerim.fr> | 2003-03-10 23:10:37 +0100 |
|---|---|---|
| committer | Stephane Carrez <ciceron@gcc.gnu.org> | 2003-03-10 23:10:37 +0100 |
| commit | 2d8d15b76293051e139149bf567846f1798fe2d0 (patch) | |
| tree | f742d7d89ab767ab7a0bad18a7bdcd9c8ea996db /gcc | |
| parent | 70f0e2883a4554c39445a4fd27e1490fcc828853 (diff) | |
| download | gcc-2d8d15b76293051e139149bf567846f1798fe2d0.zip gcc-2d8d15b76293051e139149bf567846f1798fe2d0.tar.gz gcc-2d8d15b76293051e139149bf567846f1798fe2d0.tar.bz2 | |
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
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 8 | ||||
| -rw-r--r-- | gcc/config/m68hc11/m68hc11-protos.h | 1 | ||||
| -rw-r--r-- | gcc/config/m68hc11/m68hc11.c | 17 | ||||
| -rw-r--r-- | gcc/config/m68hc11/m68hc11.h | 6 |
4 files changed, 32 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 9d2762f..70a26e2 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,13 @@ 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> + * config/m68hc11/m68hc11.md ("*addhi3_68hc12"): Accept any constant when adding to X and Y since leax/leay are fast. ("*addhi3"): Accept 'I' constraint when adding to address register. diff --git a/gcc/config/m68hc11/m68hc11-protos.h b/gcc/config/m68hc11/m68hc11-protos.h index dda1469..01352b3 100644 --- a/gcc/config/m68hc11/m68hc11-protos.h +++ b/gcc/config/m68hc11/m68hc11-protos.h @@ -24,6 +24,7 @@ extern int m68hc11_override_options PARAMS((void)); extern int m68hc11_optimization_options PARAMS((int,int)); extern void m68hc11_conditional_register_usage PARAMS((void)); 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_initial_frame_pointer_offset PARAMS((void)); diff --git a/gcc/config/m68hc11/m68hc11.c b/gcc/config/m68hc11/m68hc11.c index 9ccac2e..ba4407b 100644 --- a/gcc/config/m68hc11/m68hc11.c +++ b/gcc/config/m68hc11/m68hc11.c @@ -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 preferred_reload_class (operand, class) rtx operand; diff --git a/gcc/config/m68hc11/m68hc11.h b/gcc/config/m68hc11/m68hc11.h index 3aa6a8e..95d3f60 100644 --- a/gcc/config/m68hc11/m68hc11.h +++ b/gcc/config/m68hc11/m68hc11.h @@ -801,6 +801,12 @@ extern enum reg_class m68hc11_tmp_regs_class; #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 assigned to registers of class CLASS would likely be spilled because registers of CLASS are needed for spill registers. |