diff options
| author | gjl <gjl@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-06-28 13:58:32 +0000 |
|---|---|---|
| committer | gjl <gjl@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-06-28 13:58:32 +0000 |
| commit | 4d025e72b3cb3539fb3d8c152ab9597f547450d9 (patch) | |
| tree | 93ac9952fed04490768eb50f6e5eb31421f22b09 | |
| parent | 9184bcae75f69ce9eb976bc5e028dc1d08d880f9 (diff) | |
| download | gcc-4d025e72b3cb3539fb3d8c152ab9597f547450d9.tar.gz | |
Backport from 2012-06-28 mainline r189049
PR 53595
* config/avr/avr.c (avr_hard_regno_call_part_clobbered): New.
* config/avr/avr-protos.h (avr_hard_regno_call_part_clobbered): New.
* config/avr/avr.h (HARD_REGNO_CALL_PART_CLOBBERED): Forward to
avr_hard_regno_call_part_clobbered.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_7-branch@189050 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 10 | ||||
| -rw-r--r-- | gcc/config/avr/avr-protos.h | 1 | ||||
| -rw-r--r-- | gcc/config/avr/avr.c | 22 | ||||
| -rw-r--r-- | gcc/config/avr/avr.h | 6 |
4 files changed, 35 insertions, 4 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index a4e9daad4a2..ec8c7bc684f 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,13 @@ +2012-06-28 Georg-Johann Lay <avr@gjlay.de> + + Backport from 2012-06-28 mainline r189049 + + PR 53595 + * config/avr/avr.c (avr_hard_regno_call_part_clobbered): New. + * config/avr/avr-protos.h (avr_hard_regno_call_part_clobbered): New. + * config/avr/avr.h (HARD_REGNO_CALL_PART_CLOBBERED): Forward to + avr_hard_regno_call_part_clobbered. + 2012-06-28 Richard Guenther <rguenther@suse.de> PR middle-end/53790 diff --git a/gcc/config/avr/avr-protos.h b/gcc/config/avr/avr-protos.h index fa1462ce886..7b9b05effa6 100644 --- a/gcc/config/avr/avr-protos.h +++ b/gcc/config/avr/avr-protos.h @@ -47,6 +47,7 @@ extern void init_cumulative_args (CUMULATIVE_ARGS *cum, tree fntype, #endif /* TREE_CODE */ #ifdef RTX_CODE +extern int avr_hard_regno_call_part_clobbered (unsigned, enum machine_mode); extern const char *output_movqi (rtx insn, rtx operands[], int *l); extern const char *output_movhi (rtx insn, rtx operands[], int *l); extern const char *output_movsisf (rtx insn, rtx operands[], int *l); diff --git a/gcc/config/avr/avr.c b/gcc/config/avr/avr.c index 2fa12f7bf1f..50682f29690 100644 --- a/gcc/config/avr/avr.c +++ b/gcc/config/avr/avr.c @@ -8890,6 +8890,28 @@ avr_hard_regno_mode_ok (int regno, enum machine_mode mode) } +/* Implement `HARD_REGNO_CALL_PART_CLOBBERED'. */ + +int +avr_hard_regno_call_part_clobbered (unsigned regno, enum machine_mode mode) +{ + /* FIXME: This hook gets called with MODE:REGNO combinations that don't + represent valid hard registers like, e.g. HI:29. Returning TRUE + for such registers can lead to performance degradation as mentioned + in PR53595. Thus, report invalid hard registers as FALSE. */ + + if (!avr_hard_regno_mode_ok (regno, mode)) + return 0; + + /* Return true if any of the following boundaries is crossed: + 17/18, 27/28 and 29/30. */ + + return ((regno < 18 && regno + GET_MODE_SIZE (mode) > 18) + || (regno < REG_Y && regno + GET_MODE_SIZE (mode) > REG_Y) + || (regno < REG_Z && regno + GET_MODE_SIZE (mode) > REG_Z)); +} + + /* Implement `MODE_CODE_BASE_REG_CLASS'. */ enum reg_class diff --git a/gcc/config/avr/avr.h b/gcc/config/avr/avr.h index afb247c4616..d5537238217 100644 --- a/gcc/config/avr/avr.h +++ b/gcc/config/avr/avr.h @@ -394,10 +394,8 @@ enum reg_class { #define REGNO_OK_FOR_INDEX_P(NUM) 0 -#define HARD_REGNO_CALL_PART_CLOBBERED(REGNO, MODE) \ - (((REGNO) < 18 && (REGNO) + GET_MODE_SIZE (MODE) > 18) \ - || ((REGNO) < REG_Y && (REGNO) + GET_MODE_SIZE (MODE) > REG_Y) \ - || ((REGNO) < REG_Z && (REGNO) + GET_MODE_SIZE (MODE) > REG_Z)) +#define HARD_REGNO_CALL_PART_CLOBBERED(REGNO, MODE) \ + avr_hard_regno_call_part_clobbered (REGNO, MODE) #define TARGET_SMALL_REGISTER_CLASSES_FOR_MODE_P hook_bool_mode_true |