From: Christian Würdig <chriswue@ipd.info.uni-karlsruhe.de>
Date: Mon, 10 Jul 2006 12:21:35 +0000 (+0000)
Subject: fixed am candidate checker (handle special case loops where the load could be depende... 
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;h=c8d67a0697a92a2913b96f3f0a7abb5d69ad413b;p=libfirm

fixed am candidate checker (handle special case loops where the load could be dependent through memory phi on irn)
---

diff --git a/ir/be/ia32/ia32_optimize.c b/ir/be/ia32/ia32_optimize.c
index 2bc269f34..0736872fb 100644
--- a/ir/be/ia32/ia32_optimize.c
+++ b/ir/be/ia32/ia32_optimize.c
@@ -776,6 +776,8 @@ static ia32_am_cand_t is_am_candidate(ia32_code_gen_t *cg, heights_t *h, const i
 		if (get_nodes_block(other) == block) {
 			other   = skip_Proj(other);
 			is_cand = heights_reachable_in_block(h, other, load) ? 0 : is_cand;
+			/* this could happen in loops */
+			is_cand = heights_reachable_in_block(h, load, irn) ? 0 : is_cand;
 		}
 	}
 
@@ -794,6 +796,8 @@ static ia32_am_cand_t is_am_candidate(ia32_code_gen_t *cg, heights_t *h, const i
 		if (get_nodes_block(other) == block) {
 			other   = skip_Proj(other);
 			is_cand = heights_reachable_in_block(h, other, load) ? 0 : is_cand;
+			/* this could happen in loops */
+			is_cand = heights_reachable_in_block(h, load, irn) ? 0 : is_cand;
 		}
 	}