[PATCH 4/5] PRU: Remove TARGET_HARD_REGNO_CALL_PART_CLOBBERED

[Dimitar Dimitrov]

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:

2019-10-13  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>
---
 gcc/config/pru/pru.c | 34 ----------------------------------
 1 file changed, 34 deletions(-)

diff --git a/gcc/config/pru/pru.c b/gcc/config/pru/pru.c
index dabea2b59c8..d66b989eb2d 100644
--- a/gcc/config/pru/pru.c
+++ b/gcc/config/pru/pru.c
@@ -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
-- 
2.20.1