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[PATCH 2/2] [ARC] Code size modifications.
- From: Claudiu Zissulescu <Claudiu dot Zissulescu at synopsys dot com>
- To: <gcc-patches at gcc dot gnu dot org>
- Cc: <Claudiu dot Zissulescu at synopsys dot com>, <Francois dot Bedard at synopsys dot com>, <andrew dot burgess at embecosm dot com>
- Date: Tue, 28 Feb 2017 16:43:19 +0100
- Subject: [PATCH 2/2] [ARC] Code size modifications.
- Authentication-results: sourceware.org; auth=none
- References: <1488296599-1832-1-git-send-email-claziss@synopsys.com>
gcc/
2016-09-20 Claudiu Zissulescu <claziss@synopsys.com>
* config/arc/arc.c (arc_init): Use multiplier whenever we have it.
(arc_conditional_register_usage): Use a different allocation order
when optimizing for size.
* common/config/arc/arc-common.c (arc_option_optimization_table):
Section anchors default on when optimizing for size.
---
gcc/common/config/arc/arc-common.c | 1 +
gcc/config/arc/arc.c | 56 ++++++++++++++++++++++++++++----------
2 files changed, 43 insertions(+), 14 deletions(-)
diff --git a/gcc/common/config/arc/arc-common.c b/gcc/common/config/arc/arc-common.c
index 88bfec6..82e0dd3 100644
--- a/gcc/common/config/arc/arc-common.c
+++ b/gcc/common/config/arc/arc-common.c
@@ -46,6 +46,7 @@ arc_option_init_struct (struct gcc_options *opts)
#define OPT_LEVELS_3_PLUS_SPEED_ONLY OPT_LEVELS_3_PLUS
static const struct default_options arc_option_optimization_table[] =
{
+ { OPT_LEVELS_SIZE, OPT_fsection_anchors, NULL, 1 },
{ OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 },
{ OPT_LEVELS_ALL, OPT_mRcq, NULL, 1 },
{ OPT_LEVELS_ALL, OPT_mRcw, NULL, 1 },
diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c
index 1c929ff..bde3c30 100644
--- a/gcc/config/arc/arc.c
+++ b/gcc/config/arc/arc.c
@@ -679,6 +679,12 @@ make_pass_arc_predicate_delay_insns (gcc::context *ctxt)
static void
arc_init (void)
{
+ if (TARGET_V2)
+ {
+ /* I have the multiplier, then use it*/
+ if (TARGET_MPYW || TARGET_MULTI)
+ arc_multcost = COSTS_N_INSNS (1);
+ }
/* Note: arc_multcost is only used in rtx_cost if speed is true. */
if (arc_multcost < 0)
switch (arc_tune)
@@ -1377,20 +1383,42 @@ arc_conditional_register_usage (void)
}
if (TARGET_Q_CLASS)
{
- reg_alloc_order[2] = 12;
- reg_alloc_order[3] = 13;
- reg_alloc_order[4] = 14;
- reg_alloc_order[5] = 15;
- reg_alloc_order[6] = 1;
- reg_alloc_order[7] = 0;
- reg_alloc_order[8] = 4;
- reg_alloc_order[9] = 5;
- reg_alloc_order[10] = 6;
- reg_alloc_order[11] = 7;
- reg_alloc_order[12] = 8;
- reg_alloc_order[13] = 9;
- reg_alloc_order[14] = 10;
- reg_alloc_order[15] = 11;
+ if (optimize_size)
+ {
+ reg_alloc_order[0] = 0;
+ reg_alloc_order[1] = 1;
+ reg_alloc_order[2] = 2;
+ reg_alloc_order[3] = 3;
+ reg_alloc_order[4] = 12;
+ reg_alloc_order[5] = 13;
+ reg_alloc_order[6] = 14;
+ reg_alloc_order[7] = 15;
+ reg_alloc_order[8] = 4;
+ reg_alloc_order[9] = 5;
+ reg_alloc_order[10] = 6;
+ reg_alloc_order[11] = 7;
+ reg_alloc_order[12] = 8;
+ reg_alloc_order[13] = 9;
+ reg_alloc_order[14] = 10;
+ reg_alloc_order[15] = 11;
+ }
+ else
+ {
+ reg_alloc_order[2] = 12;
+ reg_alloc_order[3] = 13;
+ reg_alloc_order[4] = 14;
+ reg_alloc_order[5] = 15;
+ reg_alloc_order[6] = 1;
+ reg_alloc_order[7] = 0;
+ reg_alloc_order[8] = 4;
+ reg_alloc_order[9] = 5;
+ reg_alloc_order[10] = 6;
+ reg_alloc_order[11] = 7;
+ reg_alloc_order[12] = 8;
+ reg_alloc_order[13] = 9;
+ reg_alloc_order[14] = 10;
+ reg_alloc_order[15] = 11;
+ }
}
if (TARGET_SIMD_SET)
{
--
1.9.1