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[ARM] PR rtl-optimization/68664 Implement TARGET_SCHED_CAN_SPECULATE_INSN hook

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PR rtl-optimization/68664
	* config/arm/arm.c (arm_sched_can_speculate_insn):
	New function.  Declare prototype.
	(TARGET_SCHED_CAN_SPECULATE_INSN): Define.

From-SVN: r245425
This commit is contained in:
Kyrylo Tkachov 2017-02-14 10:33:50 +00:00 • committed by Kyrylo Tkachov
parent b48d642189
commit f6cc254a28
2 changed files with 40 additions and 0 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2017-02-14 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
PR rtl-optimization/68664
* config/arm/arm.c (arm_sched_can_speculate_insn):
New function. Declare prototype.
(TARGET_SCHED_CAN_SPECULATE_INSN): Define.
2017-02-14 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
PR rtl-optimization/68664

33
gcc/config/arm/arm.c
View file

@ -240,6 +240,7 @@ static bool arm_can_inline_p (tree, tree);
static void arm_relayout_function (tree);
static bool arm_valid_target_attribute_p (tree, tree, tree, int);
static unsigned HOST_WIDE_INT arm_shift_truncation_mask (machine_mode);
static bool arm_sched_can_speculate_insn (rtx_insn *);
static bool arm_macro_fusion_p (void);
static bool arm_cannot_copy_insn_p (rtx_insn *);
static int arm_issue_rate (void);
@ -419,6 +420,9 @@ static const struct attribute_spec arm_attribute_table[] =
#undef TARGET_COMP_TYPE_ATTRIBUTES
#define TARGET_COMP_TYPE_ATTRIBUTES arm_comp_type_attributes
#undef TARGET_SCHED_CAN_SPECULATE_INSN
#define TARGET_SCHED_CAN_SPECULATE_INSN arm_sched_can_speculate_insn
#undef TARGET_SCHED_MACRO_FUSION_P
#define TARGET_SCHED_MACRO_FUSION_P arm_macro_fusion_p
@ -30078,6 +30082,35 @@ arm_fusion_enabled_p (tune_params::fuse_ops op)
return current_tune->fusible_ops & op;
}
/* Implement TARGET_SCHED_CAN_SPECULATE_INSN. Return true if INSN can be
scheduled for speculative execution. Reject the long-running division
and square-root instructions. */
static bool
arm_sched_can_speculate_insn (rtx_insn *insn)
{
switch (get_attr_type (insn))
{
case TYPE_SDIV:
case TYPE_UDIV:
case TYPE_FDIVS:
case TYPE_FDIVD:
case TYPE_FSQRTS:
case TYPE_FSQRTD:
case TYPE_NEON_FP_SQRT_S:
case TYPE_NEON_FP_SQRT_D:
case TYPE_NEON_FP_SQRT_S_Q:
case TYPE_NEON_FP_SQRT_D_Q:
case TYPE_NEON_FP_DIV_S:
case TYPE_NEON_FP_DIV_D:
case TYPE_NEON_FP_DIV_S_Q:
case TYPE_NEON_FP_DIV_D_Q:
return false;
default:
return true;
}
}
/* Implement the TARGET_ASAN_SHADOW_OFFSET hook. */
static unsigned HOST_WIDE_INT