get_irn_MacroBlock() added

[libfirm] / ir / ir / irarch.c

diff --git a/ir/ir/irarch.c b/ir/ir/irarch.c
index 051512a..04a3aeb 100644 (file)
--- a/ir/ir/irarch.c
+++ b/ir/ir/irarch.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 1995-2007 University of Karlsruhe.  All right reserved.
+ * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
  *
  * This file is part of libFirm.
  *
@@ -229,8 +229,8 @@ static unsigned char *value_to_condensed(mul_env *env, tarval *tv, int *pr) {
  * Calculate the gain when using the generalized complementary technique
  */
 static int calculate_gain(unsigned char *R, int r) {
-       int max_gain = -1;
-       int idx, i;
+       int max_gain = 0;
+       int idx = -1, i;
        int gain;
 
        /* the gain for r == 1 */
@@ -244,9 +244,7 @@ static int calculate_gain(unsigned char *R, int r) {
                        idx = i;
                }
        }
-       if (max_gain > 0)
-               return idx;
-       return -1;
+       return idx;
 }
 
 /**
@@ -326,11 +324,16 @@ static instruction *decompose_simple_cases(mul_env *env, unsigned char *R, int r
                assert(r == 2);
 
                ins = env->root;
+               if (R[1] <= env->max_S) {
+                       ins = emit_LEA(env, ins, ins, R[1]);
+                       if (R[0] != 0) {
+                               ins = emit_SHIFT(env, ins, R[0]);
+                       }
+                       return ins;
+               }
                if (R[0] != 0) {
                        ins = emit_SHIFT(env, ins, R[0]);
                }
-               if (R[1] <= env->max_S)
-                       return emit_LEA(env, ins, ins, R[1]);
 
                ins2 = emit_SHIFT(env, env->root, R[0] + R[1]);
                return emit_LEA(env, ins, ins2, 0);