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arm-protos.h (arm_attr_length_push_multi): New prototype.

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* config/arm/arm-protos.h (arm_attr_length_push_multi): New prototype.
	* config/arm/arm.c (arm_attr_length_push_multi): New function.
	* config/arm/arm.md (*push_multi): Change the length computation to
	call a C function.

From-SVN: r172169
This commit is contained in:
Wei Guozhi 2011-04-08 09:17:42 +00:00 committed by Wei Guozhi
parent 07c5f94e82
commit 0c27e2d89b
4 changed files with 38 additions and 21 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2011-04-08 Wei Guozhi <carrot@google.com>
PR target/47855
* config/arm/arm-protos.h (arm_attr_length_push_multi): New prototype.
* config/arm/arm.c (arm_attr_length_push_multi): New function.
* config/arm/arm.md (*push_multi): Change the length computation to
call a C function.
2011-04-08 Anatoly Sokolov <aesok@post.ru>
* doc/tm.texi.in (ASM_OUTPUT_BSS): Remove documentation.

1
gcc/config/arm/arm-protos.h
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@ -152,6 +152,7 @@ extern void arm_expand_sync (enum machine_mode, struct arm_sync_generator *,
extern const char *arm_output_memory_barrier (rtx *);
extern const char *arm_output_sync_insn (rtx, rtx *);
extern unsigned int arm_sync_loop_insns (rtx , rtx *);
extern int arm_attr_length_push_multi(rtx, rtx);
#if defined TREE_CODE
extern void arm_init_cumulative_args (CUMULATIVE_ARGS *, tree, rtx, tree);

26
gcc/config/arm/arm.c
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@ -23696,4 +23696,30 @@ arm_preferred_rename_class (reg_class_t rclass)
return NO_REGS;
}
/* Compute the atrribute "length" of insn "*push_multi".
So this function MUST be kept in sync with that insn pattern. */
int
arm_attr_length_push_multi(rtx parallel_op, rtx first_op)
{
int i, regno, hi_reg;
int num_saves = XVECLEN (parallel_op, 0);
/* ARM mode. */
if (TARGET_ARM)
return 4;
/* Thumb2 mode. */
regno = REGNO (first_op);
hi_reg = (REGNO_REG_CLASS (regno) == HI_REGS) && (regno != LR_REGNUM);
for (i = 1; i < num_saves && !hi_reg; i++)
{
regno = REGNO (XEXP (XVECEXP (parallel_op, 0, i), 0));
hi_reg |= (REGNO_REG_CLASS (regno) == HI_REGS) && (regno != LR_REGNUM);
}
if (!hi_reg)
return 2;
return 4;
}
#include "gt-arm.h"

24
gcc/config/arm/arm.md
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@ -10249,6 +10249,8 @@
;; Push multiple registers to the stack. Registers are in parallel (use ...)
;; expressions. For simplicity, the first register is also in the unspec
;; part.
;; To avoid the usage of GNU extension, the length attribute is computed
;; in a C function arm_attr_length_push_multi.
(define_insn "*push_multi"
[(match_parallel 2 "multi_register_push"
[(set (match_operand:BLK 0 "memory_operand" "=m")
@ -10290,27 +10292,7 @@
}"
[(set_attr "type" "store4")
(set (attr "length")
(if_then_else
(and (ne (symbol_ref "TARGET_THUMB2") (const_int 0))
(ne (symbol_ref "{
/* Check if there are any high register (except lr)
references in the list. KEEP the following iteration
in sync with the template above. */
int i, regno, hi_reg;
int num_saves = XVECLEN (operands[2], 0);
regno = REGNO (operands[1]);
hi_reg = (REGNO_REG_CLASS (regno) == HI_REGS)
&& (regno != LR_REGNUM);
for (i = 1; i < num_saves && !hi_reg; i++)
{
regno = REGNO (XEXP (XVECEXP (operands[2], 0, i), 0));
hi_reg |= (REGNO_REG_CLASS (regno) == HI_REGS)
&& (regno != LR_REGNUM);
}
!hi_reg; }")
(const_int 0)))
(const_int 2)
(const_int 4)))]
(symbol_ref "arm_attr_length_push_multi (operands[2], operands[1])"))]
)
(define_insn "stack_tie"