From: Michael Beck <beck@ipd.info.uni-karlsruhe.de>
Date: Wed, 26 Nov 2008 11:38:27 +0000 (+0000)
Subject: - put only Phi nodes into th Phi list
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;h=2a006a523ee0812e03c919a73aef7821487b7cdb;p=libfirm

- put only Phi nodes into th Phi list

[r24012]
---

diff --git a/ir/lower/lower_dw.c b/ir/lower/lower_dw.c
index ccef070ef..4b9412a0b 100644
--- a/ir/lower/lower_dw.c
+++ b/ir/lower/lower_dw.c
@@ -2150,9 +2150,12 @@ static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env) {
 	env->entries[idx]->low_word  = phi_l = new_rd_Phi(dbg, irg, block, arity, inl, mode_l);
 	env->entries[idx]->high_word = phi_h = new_rd_Phi(dbg, irg, block, arity, inh, mode);
 
-	/* Don't forget to link the new Phi nodes into the block! */
-	add_Block_phi(block, phi_l);
-	add_Block_phi(block, phi_h);
+	/* Don't forget to link the new Phi nodes into the block.
+	 * Beware that some Phis might be optimized away. */
+	if (is_Phi(phi_l))
+		add_Block_phi(block, phi_l);
+	if (is_Phi(phi_h))
+		add_Block_phi(block, phi_h);
 
 	if (enq) {
 		/* not yet finished */