diff options
Diffstat (limited to 'gcc/stmt.c')
-rw-r--r-- | gcc/stmt.c | 16 |
1 files changed, 12 insertions, 4 deletions
@@ -2286,7 +2286,7 @@ emit_case_bit_tests (tree index_type, tree index_expr, tree minval, #define HAVE_tablejump 0 #endif -/* Terminate a case (Pascal) or switch (C) statement +/* Terminate a case (Pascal/Ada) or switch (C) statement in which ORIG_INDEX is the expression to be tested. If ORIG_TYPE is not NULL, it is the original ORIG_INDEX type as given in the source before any compiler conversions. @@ -2348,10 +2348,18 @@ expand_case (tree exp) for (i = TREE_VEC_LENGTH (vec) - 1; --i >= 0; ) { + tree low, high; elt = TREE_VEC_ELT (vec, i); - gcc_assert (CASE_LOW (elt)); - case_list = add_case_node (case_list, index_type, - CASE_LOW (elt), CASE_HIGH (elt), + + low = CASE_LOW (elt); + gcc_assert (low); + high = CASE_HIGH (elt); + + /* Discard empty ranges. */ + if (high && INT_CST_LT (high, low)) + continue; + + case_list = add_case_node (case_list, index_type, low, high, CASE_LABEL (elt)); } |