VM: Use constant pool also for leaf runtime calls on x64, arm, arm64 and mips.

runtime/vm/assembler_arm64.cc

Index: runtime/vm/assembler_arm64.cc
diff --git a/runtime/vm/assembler_arm64.cc b/runtime/vm/assembler_arm64.cc
index 72d90f221aeec291afe226b66b19b639ca5e6d5e..7ea74a2f0ce72435bd16f5dfe76b3cd5f354cbb6 100644
--- a/runtime/vm/assembler_arm64.cc
+++ b/runtime/vm/assembler_arm64.cc
@@ -584,27 +584,48 @@ void Assembler::LoadDImmediate(VRegister vd, double immd) {
 }
 
 
+void Assembler::Branch(const ExternalLabel* label) {
+  LoadExternalLabel(TMP, label);
+  br(TMP);
+}
+
+
 void Assembler::Branch(const StubEntry& stub_entry) {
   const ExternalLabel label(stub_entry.EntryPoint());
   Branch(&label);
 }
 
 
+void Assembler::BranchPatchable(const ExternalLabel* label) {
+  // TODO(zra): Use LoadExternalLabelFixed if possible.
+  LoadImmediateFixed(TMP, label->address());
+  br(TMP);
+}
+
 void Assembler::BranchPatchable(const StubEntry& stub_entry) {
-  const ExternalLabel label(stub_entry.EntryPoint());
-  BranchPatchable(&label);
+  BranchPatchable(&stub_entry.label());
+}
+
+
+void Assembler::BranchLink(const ExternalLabel* label) {
+  LoadExternalLabel(TMP, label);
+  blr(TMP);
 }
 
 
 void Assembler::BranchLink(const StubEntry& stub_entry) {
-  const ExternalLabel label(stub_entry.EntryPoint());
-  BranchLink(&label);
+  BranchLink(&stub_entry.label());
+}
+
+
+void Assembler::BranchLinkPatchable(const ExternalLabel* label) {
+  LoadExternalLabelFixed(TMP, label, kPatchable);
+  blr(TMP);
 }
 
 
 void Assembler::BranchLinkPatchable(const StubEntry& stub_entry) {
-  const ExternalLabel label(stub_entry.EntryPoint());
-  BranchLinkPatchable(&label);
+  BranchLinkPatchable(&stub_entry.label());
 }
 
 
@@ -1144,7 +1165,7 @@ void Assembler::LeaveDartFrame() {
 
 
 void Assembler::EnterCallRuntimeFrame(intptr_t frame_size) {
-  EnterFrame(0);
+  EnterStubFrame();
 
   // Store fpu registers with the lowest register number at the lowest
   // address.
@@ -1174,7 +1195,8 @@ void Assembler::LeaveCallRuntimeFrame() {
   // We need to restore it before restoring registers.
   const intptr_t kPushedRegistersSize =
       kDartVolatileCpuRegCount * kWordSize +
-      kDartVolatileFpuRegCount * kWordSize;
+      kDartVolatileFpuRegCount * kWordSize +
+      2 * kWordSize;  // PP and pc marker from EnterStubFrame.
   AddImmediate(SP, FP, -kPushedRegistersSize);
   for (int i = kDartLastVolatileCpuReg; i >= kDartFirstVolatileCpuReg; i--) {
     const Register reg = static_cast<Register>(i);
@@ -1192,7 +1214,7 @@ void Assembler::LeaveCallRuntimeFrame() {
     PopDouble(reg);
   }
 
-  PopPair(LR, FP);
+  LeaveStubFrame();
 }