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tree-scalar-evolution.c (instantiate_scev_bitnot): New. 

2009-09-01  Sebastian Pop  <sebastian.pop@amd.com>

	* tree-scalar-evolution.c (instantiate_scev_bitnot): New.
	(instantiate_scev_1): Move code in instantiate_scev_bitnot.

From-SVN: r154535
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Sebastian Pop 2009-11-25 04:29:43 +00:00 committed by Sebastian Pop
parent 9c382ce91b
commit 7ec0665dc4
2 changed files with 46 additions and 18 deletions
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5
gcc/ChangeLog.graphite
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@ -1,3 +1,8 @@
2009-09-01 Sebastian Pop <sebastian.pop@amd.com>
* tree-scalar-evolution.c (instantiate_scev_bitnot): New.
(instantiate_scev_1): Move code in instantiate_scev_bitnot.
2009-09-01 Sebastian Pop <sebastian.pop@amd.com>
* tree-scalar-evolution.c (instantiate_scev_convert): New.

59
gcc/tree-scalar-evolution.c
View File

@ -2297,6 +2297,44 @@ instantiate_scev_convert (basic_block instantiate_below,
return chrec_convert (type, op0, NULL);
}
/* Analyze all the parameters of the chrec, between INSTANTIATE_BELOW
and EVOLUTION_LOOP, that were left under a symbolic form.
CHREC is a BIT_NOT_EXPR expression to be instantiated.
Handle ~X as -1 - X.
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_scev_bitnot (basic_block instantiate_below,
struct loop *evolution_loop, tree chrec,
bool fold_conversions, htab_t cache, int size_expr)
{
tree type = chrec_type (chrec);
tree op0 = instantiate_scev_1 (instantiate_below, evolution_loop,
TREE_OPERAND (chrec, 0),
fold_conversions, cache, size_expr);
if (op0 == chrec_dont_know)
return chrec_dont_know;
if (TREE_OPERAND (chrec, 0) != op0)
{
op0 = chrec_convert (type, op0, NULL);
chrec = chrec_fold_minus (type,
fold_convert (type,
integer_minus_one_node),
op0);
}
return chrec;
}
/* Analyze all the parameters of the chrec, between INSTANTIATE_BELOW
and EVOLUTION_LOOP, that were left under a symbolic form.
@ -2317,7 +2355,6 @@ instantiate_scev_1 (basic_block instantiate_below,
bool fold_conversions, htab_t cache, int size_expr)
{
tree op0, op1, op2;
tree type = chrec_type (chrec);
/* Give up if the expression is larger than the MAX that we allow. */
if (size_expr++ > PARAM_VALUE (PARAM_SCEV_MAX_EXPR_SIZE))
@ -2367,22 +2404,8 @@ instantiate_scev_1 (basic_block instantiate_below,
fold_conversions, cache, size_expr);
case BIT_NOT_EXPR:
/* Handle ~X as -1 - X. */
op0 = instantiate_scev_1 (instantiate_below, evolution_loop,
TREE_OPERAND (chrec, 0),
fold_conversions, cache, size_expr);
if (op0 == chrec_dont_know)
return chrec_dont_know;
if (TREE_OPERAND (chrec, 0) != op0)
{
op0 = chrec_convert (type, op0, NULL);
chrec = chrec_fold_minus (type,
fold_convert (type,
integer_minus_one_node),
op0);
}
return chrec;
return instantiate_scev_bitnot (instantiate_below, evolution_loop, chrec,
fold_conversions, cache, size_expr);
case SCEV_NOT_KNOWN:
return chrec_dont_know;
@ -2443,7 +2466,7 @@ instantiate_scev_1 (basic_block instantiate_below,
&& op1 == TREE_OPERAND (chrec, 1))
return chrec;
return fold_build2 (TREE_CODE (chrec), TREE_TYPE (chrec), op0, op1);
case 1:
op0 = instantiate_scev_1 (instantiate_below, evolution_loop,
TREE_OPERAND (chrec, 0),