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fold-const.c (fold_unary_loc): Handle REDUC_MIN_EXPR, REDUC_MAX_EXPR and REDUC_PLUS_EXPR.

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* fold-const.c (fold_unary_loc): Handle REDUC_MIN_EXPR,
	REDUC_MAX_EXPR and REDUC_PLUS_EXPR.

From-SVN: r192376
This commit is contained in:
Jakub Jelinek 2012-10-11 20:37:23 +02:00 • committed by Jakub Jelinek
parent e87924ab48
commit db9310ef6c
2 changed files with 39 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2012-10-11 Jakub Jelinek <jakub@redhat.com>
* fold-const.c (fold_unary_loc): Handle REDUC_MIN_EXPR,
REDUC_MAX_EXPR and REDUC_PLUS_EXPR.
2012-10-11 James Lemke <jwlemke@codesourcery.com>
* config/rs6000/predicates.md (zero_fp_constant): Fix comment.

34
gcc/fold-const.c
View file

@ -8294,6 +8294,40 @@ fold_unary_loc (location_t loc, enum tree_code code, tree type, tree op0)
return build_vector (type, elts);
}
case REDUC_MIN_EXPR:
case REDUC_MAX_EXPR:
case REDUC_PLUS_EXPR:
{
unsigned int nelts = TYPE_VECTOR_SUBPARTS (type), i;
tree *elts;
enum tree_code subcode;
if (TREE_CODE (op0) != VECTOR_CST)
return NULL_TREE;
elts = XALLOCAVEC (tree, nelts);
if (!vec_cst_ctor_to_array (op0, elts))
return NULL_TREE;
switch (code)
{
case REDUC_MIN_EXPR: subcode = MIN_EXPR; break;
case REDUC_MAX_EXPR: subcode = MAX_EXPR; break;
case REDUC_PLUS_EXPR: subcode = PLUS_EXPR; break;
default: gcc_unreachable ();
}
for (i = 1; i < nelts; i++)
{
elts[0] = const_binop (subcode, elts[0], elts[i]);
if (elts[0] == NULL_TREE || !CONSTANT_CLASS_P (elts[0]))
return NULL_TREE;
elts[i] = build_zero_cst (TREE_TYPE (type));
}
return build_vector (type, elts);
}
default:
return NULL_TREE;
} /* switch (code) */