/* 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.
+
CHREC is the scalar evolution to instantiate.
CACHE is the cache of already instantiated values.
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))
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,