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.cc

diff --git a/compiler/optimizing/code_generator_x86.cc b/compiler/optimizing/code_generator_x86.cc
index 3383cb2..9b36a97 100644
--- a/compiler/optimizing/code_generator_x86.cc
+++ b/compiler/optimizing/code_generator_x86.cc
@@ -122,8 +122,10 @@
 
   virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
     __ Bind(GetEntryLabel());
+    codegen->SaveLiveRegisters(instruction_->GetLocations());
     __ fs()->call(Address::Absolute(QUICK_ENTRYPOINT_OFFSET(kX86WordSize, pTestSuspend)));
     codegen->RecordPcInfo(instruction_, instruction_->GetDexPc());
+    codegen->RestoreLiveRegisters(instruction_->GetLocations());
     __ jmp(GetReturnLabel());
   }
 
@@ -161,6 +163,14 @@
   stream << X86ManagedRegister::FromXmmRegister(XmmRegister(reg));
 }
 
+void CodeGeneratorX86::SaveCoreRegister(Location stack_location, uint32_t reg_id) {
+  __ movl(Address(ESP, stack_location.GetStackIndex()), static_cast<Register>(reg_id));
+}
+
+void CodeGeneratorX86::RestoreCoreRegister(Location stack_location, uint32_t reg_id) {
+  __ movl(static_cast<Register>(reg_id), Address(ESP, stack_location.GetStackIndex()));
+}
+
 CodeGeneratorX86::CodeGeneratorX86(HGraph* graph)
     : CodeGenerator(graph, kNumberOfRegIds),
       location_builder_(graph, this),