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fold-const.c (fold_convert_const): Fold changing cv-quals on VECTOR_CST. 

* fold-const.c (fold_convert_const): Fold changing cv-quals on
	VECTOR_CST.

From-SVN: r230358
This commit is contained in:
Jason Merrill 2015-11-13 17:24:39 -05:00 committed by Jason Merrill
parent e45639f3bd
commit 9514e74fcd
3 changed files with 23 additions and 1 deletions
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3
gcc/ChangeLog
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@ -1,5 +1,8 @@
2015-11-13 Jason Merrill <jason@redhat.com>
* fold-const.c (fold_convert_const): Fold changing cv-quals on
VECTOR_CST.
* hash-map.h (hash_map::empty): New.
2015-11-13 Nathan Sidwell <nathan@codesourcery.com>

19
gcc/fold-const.c
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@ -2095,6 +2095,25 @@ fold_convert_const (enum tree_code code, tree type, tree arg1)
else if (TREE_CODE (arg1) == REAL_CST)
return fold_convert_const_fixed_from_real (type, arg1);
}
else if (TREE_CODE (type) == VECTOR_TYPE)
{
if (TREE_CODE (arg1) == VECTOR_CST
&& TYPE_VECTOR_SUBPARTS (type) == VECTOR_CST_NELTS (arg1))
{
int len = TYPE_VECTOR_SUBPARTS (type);
tree elttype = TREE_TYPE (type);
tree *v = XALLOCAVEC (tree, len);
for (int i = 0; i < len; ++i)
{
tree elt = VECTOR_CST_ELT (arg1, i);
tree cvt = fold_convert_const (code, elttype, elt);
if (cvt == NULL_TREE)
return NULL_TREE;
v[i] = cvt;
}
return build_vector (type, v);
}
}
return NULL_TREE;
}

2
gcc/tree.def
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@ -303,7 +303,7 @@ DEFTREECODE (FIXED_CST, "fixed_cst", tcc_constant, 0)
whose contents are other constant nodes. */
DEFTREECODE (COMPLEX_CST, "complex_cst", tcc_constant, 0)
/* Contents are in TREE_VECTOR_CST_ELTS field. */
/* Contents are in VECTOR_CST_ELTS field. */
DEFTREECODE (VECTOR_CST, "vector_cst", tcc_constant, 0)
/* Contents are TREE_STRING_LENGTH and the actual contents of the string. */