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tree-ssa-operands.c (swap_tree_operands): Always adjust existing operand positions. 

2011-09-09  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-operands.c (swap_tree_operands): Always adjust
	existing operand positions.

From-SVN: r178723
This commit is contained in:
Richard Guenther 2011-09-09 10:31:10 +00:00 committed by Richard Biener
parent ffd78b302f
commit 64d9cb054e
2 changed files with 13 additions and 9 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2011-09-09 Richard Guenther <rguenther@suse.de>
* tree-ssa-operands.c (swap_tree_operands): Always adjust
existing operand positions.
2011-09-09 Richard Guenther <rguenther@suse.de>
PR middle-end/50333

17
gcc/tree-ssa-operands.c
View File

@ -1149,7 +1149,8 @@ swap_tree_operands (gimple stmt, tree *exp0, tree *exp1)
/* If the operand cache is active, attempt to preserve the relative
positions of these two operands in their respective immediate use
lists. */
lists by adjusting their use pointer to point to the new
operand position. */
if (ssa_operands_active () && op0 != op1)
{
use_optype_p use0, use1, ptr;
@ -1170,14 +1171,12 @@ swap_tree_operands (gimple stmt, tree *exp0, tree *exp1)
break;
}
/* If both uses don't have operand entries, there isn't much we can do
at this point. Presumably we don't need to worry about it. */
if (use0 && use1)
{
tree *tmp = USE_OP_PTR (use1)->use;
USE_OP_PTR (use1)->use = USE_OP_PTR (use0)->use;
USE_OP_PTR (use0)->use = tmp;
}
/* And adjust their location to point to the new position of the
operand. */
if (use0)
USE_OP_PTR (use0)->use = exp1;
if (use1)
USE_OP_PTR (use1)->use = exp0;
}
/* Now swap the data. */