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tree-scalar-evolution.c (instantiate_scev_3): New. 

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

	* tree-scalar-evolution.c (instantiate_scev_3): New.
	(instantiate_scev_1): Move code in instantiate_scev_3.

From-SVN: r154537
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Sebastian Pop 2009-11-25 04:30:41 +00:00 committed by Sebastian Pop
parent ec6636ebd8
commit d814176c58
2 changed files with 55 additions and 26 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_3): New.
(instantiate_scev_1): Move code in instantiate_scev_3.
2009-09-01 Sebastian Pop <sebastian.pop@amd.com>
* tree-scalar-evolution.c (instantiate_scev_poly): New.

76
gcc/tree-scalar-evolution.c
View File

@ -2376,6 +2376,53 @@ instantiate_scev_bitnot (basic_block instantiate_below,
return chrec;
}
/* Analyze all the parameters of the chrec, between INSTANTIATE_BELOW
and EVOLUTION_LOOP, that were left under a symbolic form.
CHREC is an expression with 3 operands 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_scev_3 (basic_block instantiate_below,
struct loop *evolution_loop, tree chrec,
bool fold_conversions, htab_t cache, int size_expr)
{
tree op1, op2;
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;
op1 = instantiate_scev_1 (instantiate_below, evolution_loop,
TREE_OPERAND (chrec, 1),
fold_conversions, cache, size_expr);
if (op1 == chrec_dont_know)
return chrec_dont_know;
op2 = instantiate_scev_1 (instantiate_below, evolution_loop,
TREE_OPERAND (chrec, 2),
fold_conversions, cache, size_expr);
if (op2 == chrec_dont_know)
return chrec_dont_know;
if (op0 == TREE_OPERAND (chrec, 0)
&& op1 == TREE_OPERAND (chrec, 1)
&& op2 == TREE_OPERAND (chrec, 2))
return chrec;
return fold_build3 (TREE_CODE (chrec),
TREE_TYPE (chrec), op0, op1, op2);
}
/* Analyze all the parameters of the chrec, between INSTANTIATE_BELOW
and EVOLUTION_LOOP, that were left under a symbolic form.
@ -2395,7 +2442,7 @@ instantiate_scev_1 (basic_block instantiate_below,
struct loop *evolution_loop, tree chrec,
bool fold_conversions, htab_t cache, int size_expr)
{
tree op0, op1, op2;
tree op0, op1;
/* Give up if the expression is larger than the MAX that we allow. */
if (size_expr++ > PARAM_VALUE (PARAM_SCEV_MAX_EXPR_SIZE))
@ -2447,31 +2494,8 @@ instantiate_scev_1 (basic_block instantiate_below,
switch (TREE_CODE_LENGTH (TREE_CODE (chrec)))
{
case 3:
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;
op1 = instantiate_scev_1 (instantiate_below, evolution_loop,
TREE_OPERAND (chrec, 1),
fold_conversions, cache, size_expr);
if (op1 == chrec_dont_know)
return chrec_dont_know;
op2 = instantiate_scev_1 (instantiate_below, evolution_loop,
TREE_OPERAND (chrec, 2),
fold_conversions, cache, size_expr);
if (op2 == chrec_dont_know)
return chrec_dont_know;
if (op0 == TREE_OPERAND (chrec, 0)
&& op1 == TREE_OPERAND (chrec, 1)
&& op2 == TREE_OPERAND (chrec, 2))
return chrec;
return fold_build3 (TREE_CODE (chrec),
TREE_TYPE (chrec), op0, op1, op2);
return instantiate_scev_3 (instantiate_below, evolution_loop, chrec,
fold_conversions, cache, size_expr);
case 2:
op0 = instantiate_scev_1 (instantiate_below, evolution_loop,