git
/
gcc
mirror of git://gcc.gnu.org/git/gcc.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

tree-ssa-dom.c (canonicalize_comparison): Remove. 

2016-11-09  Richard Biener  <rguenther@suse.de>

	* tree-ssa-dom.c (canonicalize_comparison): Remove.
	(optimize_stmt): Remove redundant pre-propagation canonicalization
	of comparison operand order.

From-SVN: r242003
This commit is contained in:
Richard Biener 2016-11-09 15:09:12 +00:00 committed by Richard Biener
parent 68c937083c
commit 2c49f22a48
2 changed files with 6 additions and 46 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2016-11-09 Richard Biener <rguenther@suse.de>
* tree-ssa-dom.c (canonicalize_comparison): Remove.
(optimize_stmt): Remove redundant pre-propagation canonicalization
of comparison operand order.
2016-11-09 Martin Liska <mliska@suse.cz>
* fold-const-call.c (fold_const_call): Fix the folding.

46
gcc/tree-ssa-dom.c
View File

@ -753,49 +753,6 @@ make_pass_dominator (gcc::context *ctxt)
}
/* Given a conditional statement CONDSTMT, convert the
condition to a canonical form. */
static void
canonicalize_comparison (gcond *condstmt)
{
tree op0;
tree op1;
enum tree_code code;
gcc_assert (gimple_code (condstmt) == GIMPLE_COND);
op0 = gimple_cond_lhs (condstmt);
op1 = gimple_cond_rhs (condstmt);
code = gimple_cond_code (condstmt);
/* If it would be profitable to swap the operands, then do so to
canonicalize the statement, enabling better optimization.
By placing canonicalization of such expressions here we
transparently keep statements in canonical form, even
when the statement is modified. */
if (tree_swap_operands_p (op0, op1, false))
{
/* For relationals we need to swap the operands
and change the code. */
if (code == LT_EXPR
|| code == GT_EXPR
|| code == LE_EXPR
|| code == GE_EXPR)
{
code = swap_tree_comparison (code);
gimple_cond_set_code (condstmt, code);
gimple_cond_set_lhs (condstmt, op1);
gimple_cond_set_rhs (condstmt, op0);
update_stmt (condstmt);
}
}
}
/* A trivial wrapper so that we can present the generic jump
threading code with a simple API for simplifying statements. */
static tree
@ -1789,9 +1746,6 @@ optimize_stmt (basic_block bb, gimple_stmt_iterator si,
print_gimple_stmt (dump_file, stmt, 0, TDF_SLIM);
}
if (gimple_code (stmt) == GIMPLE_COND)
canonicalize_comparison (as_a <gcond *> (stmt));
update_stmt_if_modified (stmt);
opt_stats.num_stmts++;