Added first support for tracking locations of expressions in the...

src/arm/fast-codegen-arm.cc

Index: src/arm/fast-codegen-arm.cc
===================================================================
--- src/arm/fast-codegen-arm.cc	(revision 3073)
+++ src/arm/fast-codegen-arm.cc	(working copy)
@@ -105,7 +105,6 @@
 void FastCodeGenerator::VisitExpressionStatement(ExpressionStatement* stmt) {
   Comment cmnt(masm_, "[ ExpressionStatement");
   Visit(stmt->expression());
-  __ pop();
 }
 
 
@@ -124,15 +123,23 @@
 
 void FastCodeGenerator::VisitSlot(Slot* expr) {
   Comment cmnt(masm_, "[ Slot");
-  __ ldr(ip, MemOperand(fp, SlotOffset(expr)));
-  __ push(ip);
+  if (expr->location().is_temporary()) {
+    __ ldr(ip, MemOperand(fp, SlotOffset(expr)));
+    __ push(ip);
+  } else {
+    ASSERT(expr->location().is_nowhere());
+  }
 }
 
 
 void FastCodeGenerator::VisitLiteral(Literal* expr) {
   Comment cmnt(masm_, "[ Literal");
-  __ mov(ip, Operand(expr->handle()));
-  __ push(ip);
+  if (expr->location().is_temporary()) {
+    __ mov(ip, Operand(expr->handle()));
+    __ push(ip);
+  } else {
+    ASSERT(expr->location().is_nowhere());
+  }
 }
 
 
@@ -144,7 +151,13 @@
 
   Variable* var = expr->target()->AsVariableProxy()->AsVariable();
   ASSERT(var != NULL && var->slot() != NULL);
-  __ ldr(ip, MemOperand(sp));
+
+  if (expr->location().is_temporary()) {
+    __ ldr(ip, MemOperand(sp));
+  } else {
+    ASSERT(expr->location().is_nowhere());
+    __ pop(ip);
+  }
   __ str(ip, MemOperand(fp, SlotOffset(var->slot())));
 }