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| author | Marc Glisse <marc.glisse@inria.fr> | 2012-11-29 16:40:16 +0100 |
|---|---|---|
| committer | Marc Glisse <glisse@gcc.gnu.org> | 2012-11-29 15:40:16 +0000 |
| commit | d5a1053a0d44116b1cbd887928276517ed8f458a (patch) | |
| tree | 3dce990d568815390898750b07c2fbe8db67abb2 /gcc/fold-const.c | |
| parent | 6c5bf58a15d900b2e721b487f8a844b2bc604c47 (diff) | |
| download | gcc-d5a1053a0d44116b1cbd887928276517ed8f458a.zip gcc-d5a1053a0d44116b1cbd887928276517ed8f458a.tar.gz gcc-d5a1053a0d44116b1cbd887928276517ed8f458a.tar.bz2 | |
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
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index e4693cd..071fb8c 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -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)); |