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re PR c++/53094 (constexpr vector subscripting) 

2012-11-29  Marc Glisse  <marc.glisse@inria.fr>

	PR c++/53094
gcc/
	* fold-const.c (fold): Replace a CONSTRUCTOR with a VECTOR_CST.
gcc/cp/
	* cvt.c (ocp_convert): Call convert_to_vector.
gcc/testsuite/
	* g++.dg/ext/vector20.C: New testcase.

From-SVN: r193938
This commit is contained in:
Marc Glisse 2012-11-29 16:40:16 +01:00 committed by Marc Glisse
parent 6c5bf58a15
commit d5a1053a0d
6 changed files with 53 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2012-11-29 Marc Glisse <marc.glisse@inria.fr>
PR c++/53094
* fold-const.c (fold): Replace a CONSTRUCTOR with a VECTOR_CST.
2012-11-29 Richard Biener <rguenther@suse.de>
* tree-ssa-pre.c (get_expr_value_id): Do not add expr

5
gcc/cp/ChangeLog
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@ -1,3 +1,8 @@
2012-11-29 Marc Glisse <marc.glisse@inria.fr>
PR c++/53094
* cvt.c (ocp_convert): Call convert_to_vector.
2012-11-29 Kai Tietz <ktietz@redhat.com>
PR target/53912

2
gcc/cp/cvt.c
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@ -690,6 +690,8 @@ ocp_convert (tree type, tree expr, int convtype, int flags,
conversion. */
else if (TREE_CODE (type) == COMPLEX_TYPE)
return fold_if_not_in_template (convert_to_complex (type, e));
else if (TREE_CODE (type) == VECTOR_TYPE)
return fold_if_not_in_template (convert_to_vector (type, e));
else if (TREE_CODE (e) == TARGET_EXPR)
{
/* Don't build a NOP_EXPR of class type. Instead, change the

29
gcc/fold-const.c
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@ -14387,6 +14387,35 @@ fold (tree expr)
return t;
}
/* Return a VECTOR_CST if possible. */
case CONSTRUCTOR:
{
tree type = TREE_TYPE (t);
if (TREE_CODE (type) != VECTOR_TYPE)
return t;
tree *vec = XALLOCAVEC (tree, TYPE_VECTOR_SUBPARTS (type));
unsigned HOST_WIDE_INT idx, pos = 0;
tree value;
FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (t), idx, value)
{
if (!CONSTANT_CLASS_P (value))
return t;
if (TREE_CODE (value) == VECTOR_CST)
{
for (unsigned i = 0; i < VECTOR_CST_NELTS (value); ++i)
vec[pos++] = VECTOR_CST_ELT (value, i);
}
else
vec[pos++] = value;
}
for (; pos < TYPE_VECTOR_SUBPARTS (type); ++pos)
vec[pos] = build_zero_cst (TREE_TYPE (type));
return build_vector (type, vec);
}
case CONST_DECL:
return fold (DECL_INITIAL (t));

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2012-11-29 Marc Glisse <marc.glisse@inria.fr>
PR c++/53094
* g++.dg/ext/vector20.C: New testcase.
2012-11-28 Tobias Burnus <burnus@net-b.de>
PR fortran/52161

7
gcc/testsuite/g++.dg/ext/vector20.C Normal file
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@ -0,0 +1,7 @@
/* { dg-do compile } */
/* { dg-options "-std=c++11" } */
typedef long vec __attribute__((vector_size (2 * sizeof (long))));
constexpr vec v = { 3, 4 };
constexpr vec s = v + v;
constexpr vec w = __builtin_shuffle (v, v);