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From-SVN: r362
This commit is contained in:
Richard Kenner 1992-02-28 05:22:39 -05:00
parent 98ccf8fe77
commit de14fd738d
1 changed files with 14 additions and 7 deletions
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21
gcc/stmt.c
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@ -145,8 +145,8 @@ static tree empty_cleanup_list;
The alternative to the use of a branch table is to generate a series
of compare and jump insns. When that is done, we use the LEFT, RIGHT,
and PARENT fields to hold a binary tree. Initially the tree is
totally unbalanced, with everything on the right. The tree is the
balanced, with nodes on the left having lower case values than the parent
totally unbalanced, with everything on the right. We balance the tree
with nodes on the left having lower case values than the parent
and nodes on the right having higher values. We then output the tree
in order. */
@ -535,6 +535,7 @@ expand_computed_goto (exp)
tree exp;
{
rtx x = expand_expr (exp, 0, VOIDmode, 0);
emit_queue ();
emit_indirect_jump (x);
emit_barrier ();
}
@ -3547,6 +3548,7 @@ expand_end_case (orig_index)
|| TREE_CODE (index_expr) == INTEGER_CST
/* This will reduce to a constant. */
|| (TREE_CODE (index_expr) == CALL_EXPR
&& TREE_CODE (TREE_OPERAND (index_expr, 0)) == ADDR_EXPR
&& TREE_CODE (TREE_OPERAND (TREE_OPERAND (index_expr, 0), 0)) == FUNCTION_DECL
&& DECL_FUNCTION_CODE (TREE_OPERAND (TREE_OPERAND (index_expr, 0), 0)) == BUILT_IN_CLASSIFY_TYPE))
{
@ -4245,7 +4247,7 @@ emit_case_nodes (index, node, default_label, index_type)
Omit the conditional branch to default if we it avoid only one
right child; it costs too much space to save so little time. */
if (node->right->right
if (node->right->right || node->right->left
|| !tree_int_cst_equal (node->right->low, node->right->high))
{
if (!node_has_low_bound (node, index_type))
@ -4270,15 +4272,20 @@ emit_case_nodes (index, node, default_label, index_type)
{
/* Just one subtree, on the left. */
/* If our "most probably entry" is less probable
#if 0 /* The following code and comment were formerly part
of the condition here, but they didn't work
and I don't understand what the idea was. -- rms. */
/* If our "most probable entry" is less probable
than the default label, emit a jump to
the default label using condition codes
already lying around. With no right branch,
a branch-greater-than will get us to the default
label correctly. */
if ((use_cost_table
? cost_table[TREE_INT_CST_LOW (node->high)] < 12
: node->left->left != 0)
if (use_cost_table
&& cost_table[TREE_INT_CST_LOW (node->high)] < 12)
;
#endif /* 0 */
if (node->left->left || node->left->right
|| !tree_int_cst_equal (node->left->low, node->left->high))
{
if (!node_has_high_bound (node, index_type))