summaryrefslogtreecommitdiffhomepage
path: root/ir/be/bera.c
diff options
context:
space:
mode:
authorSebastian Hack <hack@ipd.info.uni-karlsruhe.de>2006-07-31 10:55:05 +0200
committerSebastian Hack <hack@ipd.info.uni-karlsruhe.de>2006-07-31 10:55:05 +0200
commit48f893878b07f6e334389ff52abda5cc2adbf179 (patch)
treea0230c6cad7c5b6bc7e8e0a44dee5a21e442cc97 /ir/be/bera.c
parent92aa0dde95766e4022880f208fee9d6cc4f016ac (diff)
Adapted to new liveness
Added becopyheur3 (need to compile firm with --enable-jvm)
Diffstat (limited to 'ir/be/bera.c')
-rw-r--r--ir/be/bera.c55
1 files changed, 25 insertions, 30 deletions
diff --git a/ir/be/bera.c b/ir/be/bera.c
index 8eb9979..f3b0139 100644
--- a/ir/be/bera.c
+++ b/ir/be/bera.c
@@ -49,7 +49,7 @@ int value_dominates(const ir_node *a, const ir_node *b)
* @param b The second value.
* @return 1, if a and b interfere, 0 if not.
*/
-int values_interfere(const ir_node *a, const ir_node *b)
+int values_interfere(const be_lv_t *lv, const ir_node *a, const ir_node *b)
{
int a2b = value_dominates(a, b);
int b2a = value_dominates(b, a);
@@ -71,34 +71,29 @@ int values_interfere(const ir_node *a, const ir_node *b)
bb = get_nodes_block(b);
- /*
- * If a is live end in b's block it is
- * live at b's definition (a dominates b)
- */
- if(is_live_end(bb, a))
- return 1;
-
- /*
- * Look at all usages of a.
- * If there's one usage of a in the block of b, then
- * we check, if this use is dominated by b, if that's true
- * a and b interfere. Note that b must strictly dominate the user,
- * since if b is the last user of in the block, b and a do not
- * interfere.
- * Uses of a not in b's block can be disobeyed, because the
- * check for a being live at the end of b's block is already
- * performed.
- */
- foreach_out_edge(a, edge) {
- const ir_node *user = edge->src;
- if(get_nodes_block(user) == bb
- && !is_Phi(user)
- && b != user
- && value_dominates(b, user)) {
- return 1;
- }
- }
- }
+ /*
+ * If a is live end in b's block it is
+ * live at b's definition (a dominates b)
+ */
+ if(be_is_live_end(lv, bb, a))
+ return 1;
- return 0;
+ /*
+ * Look at all usages of a.
+ * If there's one usage of a in the block of b, then
+ * we check, if this use is dominated by b, if that's true
+ * a and b interfere. Note that b must strictly dominate the user,
+ * since if b is the last user of in the block, b and a do not
+ * interfere.
+ * Uses of a not in b's block can be disobeyed, because the
+ * check for a being live at the end of b's block is already
+ * performed.
+ */
+ foreach_out_edge(a, edge) {
+ const ir_node *user = edge->src;
+ if(get_nodes_block(user) == bb && !is_Phi(user) && b != user && value_dominates(b, user))
+ return 1;
+ }
+ }
+ return 0;
}