commit e9695e5d281ad8bfbe3091e825befbedfc1b2007
author Ben Cheng <bccheng@android.com> Tue Jun 16 16:11:47 2009 -0700
committer Ben Cheng <bccheng@android.com> Wed Jun 17 12:05:41 2009 -0700
tree afed365e12f32388bcd394974ed7b003530566e1
parent 7c7e2c1e2c3f2ec9e82d28494c361609042c3561

Implemented peephole optimizations including null-check elimination, redundant ld/st elimination, ad-hoc register renaming and store sinking.

vm/compiler/Frontend.c

diff --git a/vm/compiler/Frontend.c b/vm/compiler/Frontend.c
index 6e8d964..5e75d15 100644
--- a/vm/compiler/Frontend.c
+++ b/vm/compiler/Frontend.c
@@ -198,6 +198,11 @@
     CompilationUnit cUnit;
     memset(&cUnit, 0, sizeof(CompilationUnit));
 
+    compilationId++;
+
+    cUnit.registerScoreboard.nullCheckedRegs =
+        dvmAllocBitVector(desc->method->registersSize, false);
+
     /* Initialize the printMe flag */
     cUnit.printMe = gDvmJit.printMe;
 
@@ -410,7 +415,7 @@
 
     if (cUnit.printMe) {
         LOGD("TRACEINFO (%d): 0x%08x %s%s 0x%x %d of %d, %d blocks",
-            compilationId++,
+            compilationId,
             (intptr_t) desc->method->insns,
             desc->method->clazz->descriptor,
             desc->method->name,
@@ -462,6 +467,9 @@
     /* Reset the compiler resource pool */
     dvmCompilerArenaReset();
 
+    /* Free the bit vector tracking null-checked registers */
+    dvmFreeBitVector(cUnit.registerScoreboard.nullCheckedRegs);
+
     /*
      * Things have gone smoothly - publish the starting address of
      * translation's entry point.