diff options
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 36 |
1 files changed, 24 insertions, 12 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 702f4e0..a491499 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -13657,8 +13657,11 @@ fold_binary_loc (location_t loc, case VEC_WIDEN_MULT_LO_EXPR: case VEC_WIDEN_MULT_HI_EXPR: + case VEC_WIDEN_MULT_EVEN_EXPR: + case VEC_WIDEN_MULT_ODD_EXPR: { - unsigned int nelts = TYPE_VECTOR_SUBPARTS (type), i; + unsigned int nelts = TYPE_VECTOR_SUBPARTS (type); + unsigned int out, ofs, scale; tree *elts; gcc_assert (TYPE_VECTOR_SUBPARTS (TREE_TYPE (arg0)) == nelts * 2 @@ -13671,19 +13674,28 @@ fold_binary_loc (location_t loc, || !vec_cst_ctor_to_array (arg1, elts + nelts * 2)) return NULL_TREE; - if ((!BYTES_BIG_ENDIAN) ^ (code == VEC_WIDEN_MULT_LO_EXPR)) - elts += nelts; - - for (i = 0; i < nelts; i++) + if (code == VEC_WIDEN_MULT_LO_EXPR) + scale = 0, ofs = BYTES_BIG_ENDIAN ? nelts : 0; + else if (code == VEC_WIDEN_MULT_HI_EXPR) + scale = 0, ofs = BYTES_BIG_ENDIAN ? 0 : nelts; + else if (code == VEC_WIDEN_MULT_EVEN_EXPR) + scale = 1, ofs = 0; + else /* if (code == VEC_WIDEN_MULT_ODD_EXPR) */ + scale = 1, ofs = 1; + + for (out = 0; out < nelts; out++) { - elts[i] = fold_convert_const (NOP_EXPR, TREE_TYPE (type), elts[i]); - elts[i + nelts * 2] - = fold_convert_const (NOP_EXPR, TREE_TYPE (type), - elts[i + nelts * 2]); - if (elts[i] == NULL_TREE || elts[i + nelts * 2] == NULL_TREE) + unsigned int in1 = (out << scale) + ofs; + unsigned int in2 = in1 + nelts * 2; + tree t1, t2; + + t1 = fold_convert_const (NOP_EXPR, TREE_TYPE (type), elts[in1]); + t2 = fold_convert_const (NOP_EXPR, TREE_TYPE (type), elts[in2]); + + if (t1 == NULL_TREE || t2 == NULL_TREE) return NULL_TREE; - elts[i] = const_binop (MULT_EXPR, elts[i], elts[i + nelts * 2]); - if (elts[i] == NULL_TREE || !CONSTANT_CLASS_P (elts[i])) + elts[out] = const_binop (MULT_EXPR, t1, t2); + if (elts[out] == NULL_TREE || !CONSTANT_CLASS_P (elts[out])) return NULL_TREE; } |