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PRU: Remove TARGET_HARD_REGNO_CALL_PART_CLOBBERED

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Per clarification in [1], macro is supposed to check for partial
clobbering of single HW registers. Since PRU declares only 8-bit
HW registers, and ABI does not define individual bit clobbering,
it is safe to remove the implementation.

[1] https://gcc.gnu.org/ml/gcc-patches/2019-09/msg00778.html

gcc/ChangeLog:

2020-05-05  Dimitar Dimitrov  <dimitar@dinux.eu>

	* config/pru/pru.c (pru_hard_regno_call_part_clobbered): Remove.
	(TARGET_HARD_REGNO_CALL_PART_CLOBBERED): Remove.

Signed-off-by: Dimitar Dimitrov <dimitar@dinux.eu>
This commit is contained in:
Dimitar Dimitrov 2019-09-15 18:01:22 +03:00
parent 931dfb70ab
commit 1ea8de4c8c
2 changed files with 5 additions and 34 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2020-05-05 Dimitar Dimitrov <dimitar@dinux.eu>
* config/pru/pru.c (pru_hard_regno_call_part_clobbered): Remove.
(TARGET_HARD_REGNO_CALL_PART_CLOBBERED): Remove.
2020-05-05 Dimitar Dimitrov <dimitar@dinux.eu>
* config/pru/pru.h: Mark R3.w0 as caller saved.

34
gcc/config/pru/pru.c
View file

@ -556,37 +556,6 @@ pru_hard_regno_scratch_ok (unsigned int regno)
}
/* Implement TARGET_HARD_REGNO_CALL_PART_CLOBBERED. */
static bool
pru_hard_regno_call_part_clobbered (unsigned, unsigned regno,
machine_mode mode)
{
HARD_REG_SET caller_saved_set;
HARD_REG_SET callee_saved_set;
CLEAR_HARD_REG_SET (caller_saved_set);
CLEAR_HARD_REG_SET (callee_saved_set);
/* r0 and r1 are caller saved. */
add_range_to_hard_reg_set (&caller_saved_set, 0, 2 * 4);
add_range_to_hard_reg_set (&caller_saved_set, FIRST_ARG_REGNUM,
LAST_ARG_REGNUM + 1 - FIRST_ARG_REGNUM);
/* Treat SP as callee saved. */
add_range_to_hard_reg_set (&callee_saved_set, STACK_POINTER_REGNUM, 4);
/* r3 to r13 are callee saved. */
add_range_to_hard_reg_set (&callee_saved_set, FIRST_CALLEE_SAVED_REGNUM,
LAST_CALEE_SAVED_REGNUM + 1
- FIRST_CALLEE_SAVED_REGNUM);
return overlaps_hard_reg_set_p (caller_saved_set, mode, regno)
&& overlaps_hard_reg_set_p (callee_saved_set, mode, regno);
}
/* Worker function for `HARD_REGNO_RENAME_OK'.
Return nonzero if register OLD_REG can be renamed to register NEW_REG. */
@ -2935,9 +2904,6 @@ pru_unwind_word_mode (void)
#undef TARGET_HARD_REGNO_SCRATCH_OK
#define TARGET_HARD_REGNO_SCRATCH_OK pru_hard_regno_scratch_ok
#undef TARGET_HARD_REGNO_CALL_PART_CLOBBERED
#define TARGET_HARD_REGNO_CALL_PART_CLOBBERED \
pru_hard_regno_call_part_clobbered
#undef TARGET_FUNCTION_ARG
#define TARGET_FUNCTION_ARG pru_function_arg