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[PATCH 21/44] Also handle ARRAY_REFs in instantiate_scev_r.
- From: Sebastian Pop <sebpop at gmail dot com>
- To: gcc-patches at gcc dot gnu dot org
- Cc: gcc-graphite at googlegroups dot com
- Date: Thu, 30 Sep 2010 13:01:13 -0500
- Subject: [PATCH 21/44] Also handle ARRAY_REFs in instantiate_scev_r.
- References: <1285869696-10915-1-git-send-email-sebpop@gmail.com>
From: spop <spop@138bc75d-0d04-0410-961f-82ee72b054a4>
2010-08-20 Sebastian Pop <sebastian.pop@amd.com>
* tree-scalar-evolution.c (instantiate_array_ref): New.
(instantiate_scev_r): Also handle ARRAY_REFs.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/graphite@163431 138bc75d-0d04-0410-961f-82ee72b054a4
---
gcc/ChangeLog | 5 +++++
gcc/ChangeLog.graphite | 5 +++++
gcc/tree-scalar-evolution.c | 39 +++++++++++++++++++++++++++++++++++++++
3 files changed, 49 insertions(+), 0 deletions(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 91a74e6..2a40d9e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,10 @@
2010-09-30 Sebastian Pop <sebastian.pop@amd.com>
+ * tree-scalar-evolution.c (instantiate_array_ref): New.
+ (instantiate_scev_r): Also handle ARRAY_REFs.
+
+2010-09-30 Sebastian Pop <sebastian.pop@amd.com>
+
* tree-scalar-evolution.c (chrec_contains_symbols_defined_in_loop):
Do not check for VAR_DECL, PARM_DECL, FUNCTION_DECL, LABEL_DECL,
RESULT_DECL, and FIELD_DECL. Return false for an
diff --git a/gcc/ChangeLog.graphite b/gcc/ChangeLog.graphite
index ea6bb12..0cc7fa0 100644
--- a/gcc/ChangeLog.graphite
+++ b/gcc/ChangeLog.graphite
@@ -1,5 +1,10 @@
2010-08-20 Sebastian Pop <sebastian.pop@amd.com>
+ * tree-scalar-evolution.c (instantiate_array_ref): New.
+ (instantiate_scev_r): Also handle ARRAY_REFs.
+
+2010-08-20 Sebastian Pop <sebastian.pop@amd.com>
+
* tree-scalar-evolution.c (chrec_contains_symbols_defined_in_loop):
Do not check for VAR_DECL, PARM_DECL, FUNCTION_DECL, LABEL_DECL,
RESULT_DECL, and FIELD_DECL. Return false for an
diff --git a/gcc/tree-scalar-evolution.c b/gcc/tree-scalar-evolution.c
index a7e165a..8a5797e 100644
--- a/gcc/tree-scalar-evolution.c
+++ b/gcc/tree-scalar-evolution.c
@@ -2337,6 +2337,41 @@ instantiate_scev_binary (basic_block instantiate_below,
/* Analyze all the parameters of the chrec, between INSTANTIATE_BELOW
and EVOLUTION_LOOP, that were left under a symbolic form.
+ "CHREC" is an array reference to be instantiated.
+
+ CACHE is the cache of already instantiated values.
+
+ FOLD_CONVERSIONS should be set to true when the conversions that
+ may wrap in signed/pointer type are folded, as long as the value of
+ the chrec is preserved.
+
+ SIZE_EXPR is used for computing the size of the expression to be
+ instantiated, and to stop if it exceeds some limit. */
+
+static tree
+instantiate_array_ref (basic_block instantiate_below,
+ struct loop *evolution_loop, tree chrec,
+ bool fold_conversions, htab_t cache, int size_expr)
+{
+ tree res;
+ tree index = TREE_OPERAND (chrec, 1);
+ tree op1 = instantiate_scev_r (instantiate_below, evolution_loop, index,
+ fold_conversions, cache, size_expr);
+
+ if (op1 == chrec_dont_know)
+ return chrec_dont_know;
+
+ if (chrec && op1 == index)
+ return chrec;
+
+ res = unshare_expr (chrec);
+ TREE_OPERAND (res, 1) = op1;
+ return res;
+}
+
+/* Analyze all the parameters of the chrec, between INSTANTIATE_BELOW
+ and EVOLUTION_LOOP, that were left under a symbolic form.
+
"CHREC" that stands for a convert expression "(TYPE) OP" is to be
instantiated.
@@ -2613,6 +2648,10 @@ instantiate_scev_r (basic_block instantiate_below,
case SCEV_KNOWN:
return chrec_known;
+ case ARRAY_REF:
+ return instantiate_array_ref (instantiate_below, evolution_loop, chrec,
+ fold_conversions, cache, size_expr);
+
default:
break;
}
--
1.7.0.4