commit e9176c9b9a812dc2444c82676149d5dca3231174
author jeffhao <jeffhao@google.com> Thu Feb 03 11:07:37 2011 -0800
committer jeffhao <jeffhao@google.com> Thu Feb 03 11:07:37 2011 -0800
tree 7895f6af2d41b2a839ed32332f33509817ac5d14
parent 16c26e7c49691226285744fe08b7e38b541c56f7

Fixed SCCP to properly propagate reverse subtraction.

Change-Id: If9c83d2f9ce5de466e6c7b4108bda54d2d025dd6

dx/src/com/android/dx/ssa/SCCP.java

diff --git a/dx/src/com/android/dx/ssa/SCCP.java b/dx/src/com/android/dx/ssa/SCCP.java
index 42abbb2..f8bf74f 100644
--- a/dx/src/com/android/dx/ssa/SCCP.java
+++ b/dx/src/com/android/dx/ssa/SCCP.java
@@ -268,7 +268,12 @@
                         vR = vA + vB;
                         break;
                     case RegOps.SUB:
-                        vR = vA - vB;
+                        // 1 source for reverse sub, 2 sources for regular sub
+                        if (sources.size() == 1) {
+                            vR = vB - vA;
+                        } else {
+                            vR = vA - vB;
+                        }
                         break;
                     case RegOps.MUL:
                         vR = vA * vB;