[turbofan] Various fixes to allow unboxed doubles as arguments in registers and on the stack.

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

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/code-generator.h"
 
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
 #include "src/ppc/macro-assembler-ppc.h"
@@ skipping 81 matching lines @@
     UNREACHABLE();
     return MemOperand(r0);
   }
 
   MemOperand MemoryOperand(AddressingMode* mode, size_t first_index = 0) {
     return MemoryOperand(mode, &first_index);
   }
 
   MemOperand ToMemOperand(InstructionOperand* op) const {
     DCHECK(op != NULL);
-    DCHECK(!op->IsRegister());
-    DCHECK(!op->IsDoubleRegister());
     DCHECK(op->IsStackSlot() || op->IsDoubleStackSlot());
-    // The linkage computes where all spill slots are located.
-    FrameOffset offset = linkage()->GetFrameOffset(
-        AllocatedOperand::cast(op)->index(), frame(), 0);
+    FrameOffset offset =
+        linkage()->GetFrameOffset(AllocatedOperand::cast(op)->index(), frame());
     return MemOperand(offset.from_stack_pointer() ? sp : fp, offset.offset());
   }
 };
 
 
 static inline bool HasRegisterInput(Instruction* instr, size_t index) {
   return instr->InputAt(index)->IsRegister();
 }
 
 
@@ skipping 1235 matching lines @@
 
   if (stack_slots > 0) {
     __ Add(sp, sp, -stack_slots * kPointerSize, r0);
   }
 }
 
 
 void CodeGenerator::AssembleReturn() {
   CallDescriptor* descriptor = linkage()->GetIncomingDescriptor();
   int stack_slots = frame()->GetSpillSlotCount();
+  int pop_count = static_cast<int>(descriptor->StackParameterCount());
   if (descriptor->kind() == CallDescriptor::kCallAddress) {
     if (frame()->GetRegisterSaveAreaSize() > 0) {
       // Remove this frame's spill slots first.
       if (stack_slots > 0) {
         __ Add(sp, sp, stack_slots * kPointerSize, r0);
       }
       // Restore double registers.
       const RegList double_saves = descriptor->CalleeSavedFPRegisters();
       __ MultiPopDoubles(double_saves);
 
       // Restore registers.
       RegList frame_saves = 0;
       if (FLAG_enable_embedded_constant_pool) {
         frame_saves |= kConstantPoolRegister.bit();
       }
       const RegList saves = descriptor->CalleeSavedRegisters() & ~frame_saves;
       __ MultiPop(saves);
     }
-    __ LeaveFrame(StackFrame::MANUAL);
-    __ Ret();
   } else if (descriptor->IsJSFunctionCall() || needs_frame_) {
     // Canonicalize JSFunction return sites for now.
     if (return_label_.is_bound()) {
       __ b(&return_label_);
+      return;
     } else {
       __ bind(&return_label_);
-      int pop_count = static_cast<int>(descriptor->StackParameterCount());
-      __ LeaveFrame(StackFrame::MANUAL, pop_count * kPointerSize);
-      __ Ret();
     }
-  } else {
-    __ Ret();
   }
+  __ LeaveFrame(StackFrame::MANUAL, pop_count * kPointerSize);
+  __ Ret();
 }
 
 
 void CodeGenerator::AssembleMove(InstructionOperand* source,
                                  InstructionOperand* destination) {
   PPCOperandConverter g(this, NULL);
   // Dispatch on the source and destination operand kinds.  Not all
   // combinations are possible.
   if (source->IsRegister()) {
     DCHECK(destination->IsRegister() || destination->IsStackSlot());
@@ skipping 188 matching lines @@
       }
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8