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tree-ssa-loop-manip.c (split_loop_exit_edge): Handle non-ssaname arguments of the phi nodes correctly.

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* tree-ssa-loop-manip.c (split_loop_exit_edge): Handle non-ssaname
	arguments of the phi nodes correctly.

From-SVN: r87405
This commit is contained in:
Zdenek Dvorak 2004-09-12 22:20:58 +02:00 committed by Zdenek Dvorak
parent 8591459399
commit 7fac672272
2 changed files with 17 additions and 3 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2004-09-12 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz>
* tree-ssa-loop-manip.c (split_loop_exit_edge): Handle non-ssaname
arguments of the phi nodes correctly.
2004-09-12 Jan Hubicka <jh@suse.cz>
* ggc-common.c (cmp_statistics): Fix sorting.

15
gcc/tree-ssa-loop-manip.c
View File

@ -395,17 +395,26 @@ split_loop_exit_edge (edge exit)
{
basic_block dest = exit->dest;
basic_block bb = loop_split_edge_with (exit, NULL);
tree phi, new_phi, new_name;
tree phi, new_phi, new_name, name;
use_operand_p op_p;
for (phi = phi_nodes (dest); phi; phi = TREE_CHAIN (phi))
{
op_p = PHI_ARG_DEF_PTR_FROM_EDGE (phi, bb->succ);
new_name = duplicate_ssa_name (USE_FROM_PTR (op_p), NULL);
name = USE_FROM_PTR (op_p);
/* If the argument of the phi node is a constant, we do not need
to keep it inside loop. */
if (TREE_CODE (name) != SSA_NAME)
continue;
/* Otherwise create an auxiliary phi node that will copy the value
of the ssa name out of the loop. */
new_name = duplicate_ssa_name (name, NULL);
new_phi = create_phi_node (new_name, bb);
SSA_NAME_DEF_STMT (new_name) = new_phi;
add_phi_arg (&new_phi, USE_FROM_PTR (op_p), exit);
add_phi_arg (&new_phi, name, exit);
SET_USE (op_p, new_name);
}
}