commit 3bca0df855f0e575c6ee020ed016999fc8f14122
author Nicolas Geoffray <ngeoffray@google.com> Fri Sep 19 11:01:00 2014 +0100
committer Nicolas Geoffray <ngeoffray@google.com> Tue Sep 23 13:57:30 2014 +0100
tree 15e15c8290ad314c29ca608f51d89d4db68fd9ba
parent d41491adb23764f28a80cbb7f2bd7af6491cd892

Support for saving and restoring live registers in a slow path.

And use it in suspend check slow paths.

Change-Id: I79caf28f334c145a36180c79a6e2fceae3990c31

compiler/optimizing/code_generator_x86_64.cc

diff --git a/compiler/optimizing/code_generator_x86_64.cc b/compiler/optimizing/code_generator_x86_64.cc
index ca03af8..065f981 100644
--- a/compiler/optimizing/code_generator_x86_64.cc
+++ b/compiler/optimizing/code_generator_x86_64.cc
@@ -103,8 +103,10 @@
 
   virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
     __ Bind(GetEntryLabel());
+    codegen->SaveLiveRegisters(instruction_->GetLocations());
     __ gs()->call(Address::Absolute(QUICK_ENTRYPOINT_OFFSET(kX86_64WordSize, pTestSuspend), true));
     codegen->RecordPcInfo(instruction_, instruction_->GetDexPc());
+    codegen->RestoreLiveRegisters(instruction_->GetLocations());
     __ jmp(GetReturnLabel());
   }
 
@@ -170,6 +172,14 @@
   stream << X86_64ManagedRegister::FromXmmRegister(FloatRegister(reg));
 }
 
+void CodeGeneratorX86_64::SaveCoreRegister(Location stack_location, uint32_t reg_id) {
+  __ movq(Address(CpuRegister(RSP), stack_location.GetStackIndex()), CpuRegister(reg_id));
+}
+
+void CodeGeneratorX86_64::RestoreCoreRegister(Location stack_location, uint32_t reg_id) {
+  __ movq(CpuRegister(reg_id), Address(CpuRegister(RSP), stack_location.GetStackIndex()));
+}
+
 CodeGeneratorX86_64::CodeGeneratorX86_64(HGraph* graph)
       : CodeGenerator(graph, kNumberOfRegIds),
         location_builder_(graph, this),