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_arm.cc

diff --git a/compiler/optimizing/code_generator_arm.cc b/compiler/optimizing/code_generator_arm.cc
index ad62279..ce1c73d 100644
--- a/compiler/optimizing/code_generator_arm.cc
+++ b/compiler/optimizing/code_generator_arm.cc
@@ -98,10 +98,12 @@
 
   virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
     __ Bind(GetEntryLabel());
+    codegen->SaveLiveRegisters(instruction_->GetLocations());
     int32_t offset = QUICK_ENTRYPOINT_OFFSET(kArmWordSize, pTestSuspend).Int32Value();
     __ ldr(LR, Address(TR, offset));
     __ blx(LR);
     codegen->RecordPcInfo(instruction_, instruction_->GetDexPc());
+    codegen->RestoreLiveRegisters(instruction_->GetLocations());
     __ b(GetReturnLabel());
   }
 
@@ -182,6 +184,14 @@
   stream << ArmManagedRegister::FromDRegister(DRegister(reg));
 }
 
+void CodeGeneratorARM::SaveCoreRegister(Location stack_location, uint32_t reg_id) {
+  __ str(static_cast<Register>(reg_id), Address(SP, stack_location.GetStackIndex()));
+}
+
+void CodeGeneratorARM::RestoreCoreRegister(Location stack_location, uint32_t reg_id) {
+  __ ldr(static_cast<Register>(reg_id), Address(SP, stack_location.GetStackIndex()));
+}
+
 CodeGeneratorARM::CodeGeneratorARM(HGraph* graph)
     : CodeGenerator(graph, kNumberOfRegIds),
       location_builder_(graph, this),