Enables first codegen test on arm64.

runtime/vm/assembler_arm64.cc

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/longjump.h"
@@ skipping 399 matching lines @@
     imm &= ~kSmiTagMask;  // Mask off the tag bits.
     const int32_t offset = Array::element_offset(FindImmediate(imm));
     LoadWordFromPoolOffset(reg, pp, offset);
     if (val_smi_tag != 0) {
       // Add back the tag bits.
       orri(reg, reg, val_smi_tag);
     }
   } else {
     // TODO(zra): Since this sequence only needs to be decodable, it can be
     // of variable length.
-    LoadPatchableImmediate(reg, imm);
+    LoadImmediateFixed(reg, imm);
   }
 }
 
 
-void Assembler::LoadPatchableImmediate(Register reg, int64_t imm) {
+void Assembler::LoadImmediateFixed(Register reg, int64_t imm) {
   const uint32_t w0 = Utils::Low32Bits(imm);
   const uint32_t w1 = Utils::High32Bits(imm);
   const uint16_t h0 = Utils::Low16Bits(w0);
   const uint16_t h1 = Utils::High16Bits(w0);
   const uint16_t h2 = Utils::Low16Bits(w1);
   const uint16_t h3 = Utils::High16Bits(w1);
   movz(reg, h0, 0);
   movk(reg, h1, 1);
   movk(reg, h2, 2);
   movk(reg, h3, 3);
 }
 
 
 void Assembler::LoadImmediate(Register reg, int64_t imm, Register pp) {
   Comment("LoadImmediate");
   if (CanLoadImmediateFromPool(imm, pp)) {
     // It's a 64-bit constant and we're not in the VM isolate, so load from
     // object pool.
     // Save the bits that must be masked-off for the SmiTag
     int64_t val_smi_tag = imm & kSmiTagMask;
     imm &= ~kSmiTagMask;  // Mask off the tag bits.
     const int32_t offset = Array::element_offset(FindImmediate(imm));
     LoadWordFromPoolOffset(reg, pp, offset);
     if (val_smi_tag != 0) {
       // Add back the tag bits.
       orri(reg, reg, val_smi_tag);
     }
   } else {
+    // 0. Is it 0?
+    if (imm == 0) {
+      movz(reg, 0, 0);
+      return;
+    }
+
     // 1. Can we use one orri operation?
     Operand op;
     Operand::OperandType ot;
     ot = Operand::CanHold(imm, kXRegSizeInBits, &op);
     if (ot == Operand::BitfieldImm) {
       orri(reg, ZR, imm);
       return;
     }
 
     // 2. Fall back on movz, movk, movn.
@@ skipping 248 matching lines @@
   // Load the pool pointer.
   LoadPoolPointer(PP);
 
   // Reserve space.
   if (frame_size > 0) {
     sub(SP, SP, Operand(frame_size));
   }
 }
 
 
+void Assembler::EnterDartFrameWithInfo(intptr_t frame_size, Register new_pp) {
+  // Setup the frame.
+  adr(TMP, 0);  // TMP gets PC of this instruction.
+  EnterFrame(0);
+  Push(TMP);  // Save PC Marker.
+  PushPP();  // Save PP.
+
+  // Load the pool pointer.
+  if (new_pp == kNoRegister) {
+    LoadPoolPointer(PP);
+  } else {
+    mov(PP, new_pp);
+  }
+
+  // Reserve space.
+  if (frame_size > 0) {
+    sub(SP, SP, Operand(frame_size));
+  }
+}
+
+
+// On entry to a function compiled for OSR, the caller's frame pointer, the
+// stack locals, and any copied parameters are already in place.  The frame
+// pointer is already set up.  The PC marker is not correct for the
+// optimized function and there may be extra space for spill slots to
+// allocate. We must also set up the pool pointer for the function.
+void Assembler::EnterOsrFrame(intptr_t extra_size, Register new_pp) {
+  const intptr_t offset = CodeSize();
+
+  Comment("EnterOsrFrame");
+  adr(TMP, 0);
+
+  AddImmediate(TMP, TMP, -offset, kNoRegister);
+  StoreToOffset(TMP, FP, kPcMarkerSlotFromFp * kWordSize);
+
+  // Setup pool pointer for this dart function.
+  if (new_pp == kNoRegister) {
+    LoadPoolPointer(PP);
+  } else {
+    mov(PP, new_pp);
+  }
+
+  if (extra_size > 0) {
+    sub(SP, SP, Operand(extra_size));
+  }
+}
+
+
 void Assembler::LeaveDartFrame() {
   // Restore and untag PP.
   LoadFromOffset(PP, FP, kSavedCallerPpSlotFromFp * kWordSize);
   sub(PP, PP, Operand(kHeapObjectTag));
   LeaveFrame();
 }
 
 
 void Assembler::EnterCallRuntimeFrame(intptr_t frame_size) {
   EnterFrame(0);
@@ skipping 28 matching lines @@
 
 
 void Assembler::CallRuntime(const RuntimeEntry& entry,
                             intptr_t argument_count) {
   entry.Call(this, argument_count);
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64