Have HInvoke instructions know their number of actual arguments.

Add an art::HInvoke::GetNumberOfArguments routine so that
art::HInvoke and its subclasses can return the number of
actual arguments of the called method.  Use it in code
generators and intrinsics handlers.

Consequently, no longer remove a clinit check as last input
of a static invoke if it is still present during baseline
code generation, but ensure that static invokes have no such
check as last input in optimized compilations.

Change-Id: Iaf9e07d1057a3b15b83d9638538c02b70211e476

1 files changed, 7 insertions, 11 deletions

diff --git a/compiler/optimizing/code_generator_arm64.cc b/compiler/optimizing/code_generator_arm64.cc
index dada4ce5bd..f9c473d0de 100644
--- a/compiler/optimizing/code_generator_arm64.cc
+++ b/compiler/optimizing/code_generator_arm64.cc
@@ -1908,7 +1908,7 @@ void LocationsBuilderARM64::HandleInvoke(HInvoke* invoke) {
   locations->AddTemp(LocationFrom(x0));
 
   InvokeDexCallingConventionVisitor calling_convention_visitor;
-  for (size_t i = 0; i < invoke->InputCount(); i++) {
+  for (size_t i = 0; i < invoke->GetNumberOfArguments(); i++) {
     HInstruction* input = invoke->InputAt(i);
     locations->SetInAt(i, calling_convention_visitor.GetNextLocation(input->GetType()));
   }
@@ -1968,13 +1968,9 @@ void LocationsBuilderARM64::VisitInvokeVirtual(HInvokeVirtual* invoke) {
 }
 
 void LocationsBuilderARM64::VisitInvokeStaticOrDirect(HInvokeStaticOrDirect* invoke) {
-  // Explicit clinit checks triggered by static invokes must have been
-  // pruned by art::PrepareForRegisterAllocation, but this step is not
-  // run in baseline. So we remove them manually here if we find them.
-  // TODO: Instead of this local workaround, address this properly.
-  if (invoke->IsStaticWithExplicitClinitCheck()) {
-    invoke->RemoveClinitCheckOrLoadClassAsLastInput();
-  }
+  // When we do not run baseline, explicit clinit checks triggered by static
+  // invokes must have been pruned by art::PrepareForRegisterAllocation.
+  DCHECK(codegen_->IsBaseline() || !invoke->IsStaticWithExplicitClinitCheck());
 
   IntrinsicLocationsBuilderARM64 intrinsic(GetGraph()->GetArena());
   if (intrinsic.TryDispatch(invoke)) {
@@ -2026,9 +2022,9 @@ void CodeGeneratorARM64::GenerateStaticOrDirectCall(HInvokeStaticOrDirect* invok
 }
 
 void InstructionCodeGeneratorARM64::VisitInvokeStaticOrDirect(HInvokeStaticOrDirect* invoke) {
-  // Explicit clinit checks triggered by static invokes must have been
-  // pruned by art::PrepareForRegisterAllocation.
-  DCHECK(!invoke->IsStaticWithExplicitClinitCheck());
+  // When we do not run baseline, explicit clinit checks triggered by static
+  // invokes must have been pruned by art::PrepareForRegisterAllocation.
+  DCHECK(codegen_->IsBaseline() || !invoke->IsStaticWithExplicitClinitCheck());
 
   if (TryGenerateIntrinsicCode(invoke, codegen_)) {
     return;