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tree-if-conv.c (tree_if_convert_cond_expr): Remove two "if" statements that always trigger.

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* tree-if-conv.c (tree_if_convert_cond_expr): Remove two "if"
	statements that always trigger.

From-SVN: r90267
This commit is contained in:
Kazu Hirata 2004-11-08 15:02:14 +00:00 committed by Kazu Hirata
parent f7b529fae7
commit 1b7cd4a5e5
2 changed files with 19 additions and 18 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2004-11-08 Kazu Hirata <kazu@cs.umass.edu>
* tree-if-conv.c (tree_if_convert_cond_expr): Remove two "if"
statements that always trigger.
2004-11-08 Kazu Hirata <kazu@cs.umass.edu>
* tree-cfg.c, tree-if-conv.c, tree-into-ssa.c,

32
gcc/tree-if-conv.c
View File

@ -271,7 +271,7 @@ static void
tree_if_convert_cond_expr (struct loop *loop, tree stmt, tree cond,
block_stmt_iterator *bsi)
{
tree then_clause, else_clause, c, new_cond;
tree then_clause, else_clause, c, c2, new_cond;
new_cond = NULL_TREE;
gcc_assert (TREE_CODE (stmt) == COND_EXPR);
@ -290,27 +290,23 @@ tree_if_convert_cond_expr (struct loop *loop, tree stmt, tree cond,
}
/* Add new condition into destination's predicate list. */
if (then_clause)
/* if 'c' is true then then_clause is reached. */
new_cond = add_to_dst_predicate_list (loop, then_clause, cond,
unshare_expr (c), bsi);
if (else_clause)
/* If 'c' is true then then_clause is reached. */
new_cond = add_to_dst_predicate_list (loop, then_clause, cond,
unshare_expr (c), bsi);
if (!is_gimple_reg(c) && is_gimple_condexpr (c))
{
tree c2;
if (!is_gimple_reg(c) && is_gimple_condexpr (c))
{
tree new_stmt;
new_stmt = ifc_temp_var (TREE_TYPE (c), unshare_expr (c));
bsi_insert_before (bsi, new_stmt, BSI_SAME_STMT);
c = TREE_OPERAND (new_stmt, 0);
}
/* if 'c' is false then else_clause is reached. */
c2 = invert_truthvalue (unshare_expr (c));
add_to_dst_predicate_list (loop, else_clause, cond, c2, bsi);
tree new_stmt;
new_stmt = ifc_temp_var (TREE_TYPE (c), unshare_expr (c));
bsi_insert_before (bsi, new_stmt, BSI_SAME_STMT);
c = TREE_OPERAND (new_stmt, 0);
}
/* If 'c' is false then else_clause is reached. */
c2 = invert_truthvalue (unshare_expr (c));
add_to_dst_predicate_list (loop, else_clause, cond, c2, bsi);
/* Now this conditional statement is redundant. Remove it.
But, do not remove exit condition! Update exit condition
using new condition. */