diff options
Diffstat (limited to 'gcc/c')
| -rw-r--r-- | gcc/c/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/c/c-typeck.c | 28 |
2 files changed, 34 insertions, 0 deletions
diff --git a/gcc/c/ChangeLog b/gcc/c/ChangeLog index 7d6250e..7999d2a 100644 --- a/gcc/c/ChangeLog +++ b/gcc/c/ChangeLog @@ -1,3 +1,9 @@ +2016-01-27 Marek Polacek <polacek@redhat.com> + + PR c/68062 + * c-typeck.c (build_binary_op) [EQ_EXPR, GE_EXPR]: Promote operand + to unsigned, if needed. Add -Wsign-compare warning. + 2016-01-26 Jakub Jelinek <jakub@redhat.com> PR tree-optimization/69483 diff --git a/gcc/c/c-typeck.c b/gcc/c/c-typeck.c index d602e33..65925cb 100644 --- a/gcc/c/c-typeck.c +++ b/gcc/c/c-typeck.c @@ -11048,6 +11048,20 @@ build_binary_op (location_t location, enum tree_code code, return error_mark_node; } + /* It's not precisely specified how the usual arithmetic + conversions apply to the vector types. Here, we use + the unsigned type if one of the operands is signed and + the other one is unsigned. */ + if (TYPE_UNSIGNED (type0) != TYPE_UNSIGNED (type1)) + { + if (!TYPE_UNSIGNED (type0)) + op0 = build1 (VIEW_CONVERT_EXPR, type1, op0); + else + op1 = build1 (VIEW_CONVERT_EXPR, type0, op1); + warning_at (location, OPT_Wsign_compare, "comparison between " + "types %qT and %qT", type0, type1); + } + /* Always construct signed integer vector type. */ intt = c_common_type_for_size (GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (type0))), 0); @@ -11201,6 +11215,20 @@ build_binary_op (location_t location, enum tree_code code, return error_mark_node; } + /* It's not precisely specified how the usual arithmetic + conversions apply to the vector types. Here, we use + the unsigned type if one of the operands is signed and + the other one is unsigned. */ + if (TYPE_UNSIGNED (type0) != TYPE_UNSIGNED (type1)) + { + if (!TYPE_UNSIGNED (type0)) + op0 = build1 (VIEW_CONVERT_EXPR, type1, op0); + else + op1 = build1 (VIEW_CONVERT_EXPR, type0, op1); + warning_at (location, OPT_Wsign_compare, "comparison between " + "types %qT and %qT", type0, type1); + } + /* Always construct signed integer vector type. */ intt = c_common_type_for_size (GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (type0))), 0); |