[turbofan] Save OOL constant pool pointer in CodeGenerator::AssemblePrologue.

src/compiler/arm/code-generator-arm.cc

Index: src/compiler/arm/code-generator-arm.cc
diff --git a/src/compiler/arm/code-generator-arm.cc b/src/compiler/arm/code-generator-arm.cc
index a0279c6a39de389415ac427743d063b959d43623..d6635903204f7e9f3309de39ef14867fe9d31aa5 100644
--- a/src/compiler/arm/code-generator-arm.cc
+++ b/src/compiler/arm/code-generator-arm.cc
@@ -619,8 +619,14 @@ void CodeGenerator::AssembleDeoptimizerCall(int deoptimization_id) {
 void CodeGenerator::AssemblePrologue() {
   CallDescriptor* descriptor = linkage()->GetIncomingDescriptor();
   if (descriptor->kind() == CallDescriptor::kCallAddress) {
-    __ Push(lr, fp);
-    __ mov(fp, sp);
+    if (FLAG_enable_ool_constant_pool) {

[ulan, 2014/09/04 13:50:10]

This matches now what LeaveFrame(StackFrame::MANUAL) does in
CodeGenerator::AssembleReturn.

It seems inconsistent that we manually set up frame here, but use LeaveFrame of
masm on return. Would expanding LeaveFrame be better?

+      __ Push(lr, fp, pp);
+      // Adjust FP to point to saved FP.
+      __ sub(fp, sp, Operand(StandardFrameConstants::kConstantPoolOffset));
+    } else {
+      __ Push(lr, fp);
+      __ mov(fp, sp);
+    }
     const RegList saves = descriptor->CalleeSavedRegisters();
     if (saves != 0) {  // Save callee-saved registers.
       int register_save_area_size = 0;