diff options
| author | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2008-04-02 12:54:08 +0000 |
|---|---|---|
| committer | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2008-04-02 12:54:08 +0000 |
| commit | 72c30859508c8f41376c420984a0f04963515ad6 (patch) | |
| tree | aff8bcca1cbe2777fd11b65bc13de7e52af54d3b /gcc/expr.c | |
| parent | b6d7b6c5931190fbca562f92402162aa48e8bd8f (diff) | |
| download | gcc-72c30859508c8f41376c420984a0f04963515ad6.tar.gz | |
2008-04-02 Richard Guenther <rguenther@suse.de>
PR tree-optimization/14495
PR tree-optimization/34793
* tree-vrp.c (struct switch_update): New structure.
(to_remove_edges, to_update_switch_stmts): New VECs.
(simplify_switch_using_ranges): New function. Remove not taken
case labels and edges.
(simplify_stmt_using_ranges): Call it.
(identify_jump_threads): Mark edges we have queued for removal
so we don't thread them.
(execute_vrp): Remove edges queued for removal, update SWITCH_STMT
case label vector.
* tree-cfg.c (group_case_labels): Deal with missing default label.
(tree_verify_flow_info): Allow missing default label.
* stmt.c (emit_case_bit_tests): Deal with NULL default_label.
(emit_case_nodes): Likewise.
(expand_case): Do not rely on the default label to be present.
* expr.c (try_casesi): Deal with NULL default_label.
(do_tablejump): Likewise.
* gcc.dg/tree-ssa/vrp41.c: New testcase.
* gcc.dg/tree-ssa/vrp42.c: Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@133835 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/expr.c')
| -rw-r--r-- | gcc/expr.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/gcc/expr.c b/gcc/expr.c index dbb2b4c468c..a2bd86c4d09 100644 --- a/gcc/expr.c +++ b/gcc/expr.c @@ -9851,8 +9851,9 @@ try_casesi (tree index_type, tree index_expr, tree minval, tree range, index_expr, minval); minval = integer_zero_node; index = expand_normal (index_expr); - emit_cmp_and_jump_insns (rangertx, index, LTU, NULL_RTX, - omode, 1, default_label); + if (default_label) + emit_cmp_and_jump_insns (rangertx, index, LTU, NULL_RTX, + omode, 1, default_label); /* Now we can safely truncate. */ index = convert_to_mode (index_mode, index, 0); } @@ -9931,8 +9932,9 @@ do_tablejump (rtx index, enum machine_mode mode, rtx range, rtx table_label, or equal to the minimum value of the range and less than or equal to the maximum value of the range. */ - emit_cmp_and_jump_insns (index, range, GTU, NULL_RTX, mode, 1, - default_label); + if (default_label) + emit_cmp_and_jump_insns (index, range, GTU, NULL_RTX, mode, 1, + default_label); /* If index is in range, it must fit in Pmode. Convert to Pmode so we can index with it. */ |