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[PATCH ] IRA: Speed up setup_left_conflict_sizes_p
- From: Zhouyi Zhou <zhouzhouyi at gmail dot com>
- To: gcc-patches at gcc dot gnu dot org
- Cc: Zhouyi Zhou <yizhouzhou at ict dot ac dot cn>
- Date: Wed, 11 Mar 2015 10:39:01 +0800
- Subject: [PATCH ] IRA: Speed up setup_left_conflict_sizes_p
- Authentication-results: sourceware.org; auth=none
From: Zhouyi Zhou <yizhouzhou@ict.ac.cn>
In function setup_left_conflict_sizes_p, left conflict subnodes sizes
are computed in a down-to-up fashion through the regnodes foreast.
Speed up the process from prevent node itself to involve in this
computation.
Bootstrap and regtest scheduled on x86_64 GNU/Linux
Signed-off-by: Zhouyi Zhou <yizhouzhou@ict.ac.cn>
---
gcc/ChangeLog | 5 +++++
gcc/ira-color.c | 8 +++-----
2 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b77fb5e..7688eda 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2015-03-11 Zhouyi Zhou <yizhouzhou@ict.ac.cn>
+
+ * ira-color.c (setup_left_conflict_sizes_p): Prevent node itself
+ from computing left conflict subnodes size.
+
2015-03-10 Jakub Jelinek <jakub@redhat.com>
PR target/65368
diff --git a/gcc/ira-color.c b/gcc/ira-color.c
index ff1fe8a..3e5c33a 100644
--- a/gcc/ira-color.c
+++ b/gcc/ira-color.c
@@ -938,7 +938,7 @@ setup_left_conflict_sizes_p (ira_allocno_t a)
subnodes[i].left_conflict_subnodes_size = 0;
}
start = node_preorder_num * allocno_hard_regs_nodes_num;
- for (i = data->hard_regs_subnodes_num - 1; i >= 0; i--)
+ for (i = data->hard_regs_subnodes_num - 1; i > 0; i--)
{
int size, parent_i;
allocno_hard_regs_node_t parent;
@@ -948,12 +948,10 @@ setup_left_conflict_sizes_p (ira_allocno_t a)
- subnodes[i].left_conflict_subnodes_size,
subnodes[i].left_conflict_size));
parent = allocno_hard_regs_nodes[i + node_preorder_num]->parent;
- if (parent == NULL)
- continue;
+ gcc_assert (parent);
parent_i
= allocno_hard_regs_subnode_index[start + parent->preorder_num];
- if (parent_i < 0)
- continue;
+ gcc_assert (parent_i >= 0);
subnodes[parent_i].left_conflict_subnodes_size += size;
}
left_conflict_subnodes_size = subnodes[0].left_conflict_subnodes_size;
--
1.7.10.4