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| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/fold-const.c | 34 |
2 files changed, 39 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 9ddad1b..a4bc0e4 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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. diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 99655a1..b1d811d 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -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) */ |