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* [gcc(refs/users/guojiufu/heads/personal-branch)] Boostrap-O3 for NE
@ 2021-06-14 3:28 Jiu Fu Guo
0 siblings, 0 replies; only message in thread
From: Jiu Fu Guo @ 2021-06-14 3:28 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:c34237a1dab039682b7d7239f1470e840c3a7588
commit c34237a1dab039682b7d7239f1470e840c3a7588
Author: Jiufu Guo <guojiufu@linux.ibm.com>
Date: Fri Jun 11 17:58:16 2021 +0800
Boostrap-O3 for NE
Diff:
---
gcc/tree-ssa-loop-split.c | 27 +++++++++++++++++++--------
1 file changed, 19 insertions(+), 8 deletions(-)
diff --git a/gcc/tree-ssa-loop-split.c b/gcc/tree-ssa-loop-split.c
index 688d26aecaf..209a26d9b53 100644
--- a/gcc/tree-ssa-loop-split.c
+++ b/gcc/tree-ssa-loop-split.c
@@ -1724,9 +1724,10 @@ analyze_idx_elements (class loop *loop, edge e, idx_elements &data)
|| !flow_bb_inside_loop_p (loop, gimple_bb (stmt)))
return false;
tree_code rhs_code = gimple_assign_rhs_code (stmt);
- if (rhs_code != PLUS_EXPR && rhs_code != MINUS_EXPR)
+ if (rhs_code != PLUS_EXPR)
return false;
- if (TREE_CODE (gimple_assign_rhs2 (stmt)) != INTEGER_CST)
+ tree step = gimple_assign_rhs2 (stmt);
+ if (!integer_onep (step))
return false;
inc_stmt = stmt;
tree prev = gimple_assign_rhs1 (stmt);
@@ -1835,12 +1836,20 @@ get_wrap_assumption (class loop *loop, edge *exit, idx_elements &data)
static bool
update_idx_bnd_type (class loop *loop, idx_elements &data)
{
+ gphi *phi = data.phi;
+ tree type = TREE_TYPE (PHI_RESULT (phi));
tree suitable_type = data.large_type;
+ if (TYPE_PRECISION (type) == TYPE_PRECISION (suitable_type)
+ && (TYPE_UNSIGNED (suitable_type) == TYPE_UNSIGNED (type)))
+ return false;
if (TYPE_UNSIGNED (suitable_type))
- suitable_type = sizetype;
+ {
+ if (TYPE_PRECISION (suitable_type) == TYPE_PRECISION (sizetype))
+ return false;
+ suitable_type = sizetype;
+ }
/* New base and new bound. */
- gphi *phi = data.phi;
tree bnd = data.bnd;
edge pre_e = loop_preheader_edge (loop);
tree base = PHI_ARG_DEF_FROM_EDGE (phi, pre_e);
@@ -1885,8 +1894,8 @@ update_idx_bnd_type (class loop *loop, idx_elements &data)
/* next = (next type)new_next
And remove next = prev + 1. */
- tree next = gimple_assign_lhs (inc_stmt);
- tree type = TREE_TYPE (next);
+ tree next = gimple_assign_lhs (inc_stmt);
+ type = TREE_TYPE (next);
gimple *stmt = gimple_build_assign (next, fold_convert (type, new_next));
gsi = gsi_for_stmt (inc_stmt);
gsi_insert_before (&gsi, stmt, GSI_SAME_STMT);
@@ -2018,8 +2027,10 @@ split_loop_on_wrap (class loop *loop)
free (bbs);
- if (integer_onep (no_wrap_assumption)
- || split_wrap_boundary (loop, e, no_wrap_assumption))
+ if (integer_onep (no_wrap_assumption))
+ return update_idx_bnd_type (loop, data);
+
+ if (split_wrap_boundary (loop, e, no_wrap_assumption))
{
update_idx_bnd_type (loop, data);
return true;
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