Revert "Support for inlining virtual and interface calls."
Fails for some apps.
bug: 21674542
This reverts commit 1d5006c34d75758752bf3499892e3d5beb11d5dc.
Change-Id: Ia74b5e54d59f8ffe9992591324a12f71efb67af4
diff --git a/compiler/optimizing/inliner.cc b/compiler/optimizing/inliner.cc
index b26afd1..83f8d83 100644
--- a/compiler/optimizing/inliner.cc
+++ b/compiler/optimizing/inliner.cc
@@ -27,7 +27,6 @@
#include "mirror/class_loader.h"
#include "mirror/dex_cache.h"
#include "nodes.h"
-#include "reference_type_propagation.h"
#include "register_allocator.h"
#include "ssa_phi_elimination.h"
#include "scoped_thread_state_change.h"
@@ -58,7 +57,7 @@
next_block = (i == blocks.Size() - 1) ? nullptr : blocks.Get(i + 1);
for (HInstruction* instruction = block->GetFirstInstruction(); instruction != nullptr;) {
HInstruction* next = instruction->GetNext();
- HInvoke* call = instruction->AsInvoke();
+ HInvokeStaticOrDirect* call = instruction->AsInvokeStaticOrDirect();
// As long as the call is not intrinsified, it is worth trying to inline.
if (call != nullptr && call->GetIntrinsic() == Intrinsics::kNone) {
// We use the original invoke type to ensure the resolution of the called method
@@ -77,79 +76,6 @@
}
}
-static bool IsMethodOrDeclaringClassFinal(ArtMethod* method)
- SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
- return method->IsFinal() || method->GetDeclaringClass()->IsFinal();
-}
-
-/**
- * Given the `resolved_method` looked up in the dex cache, try to find
- * the actual runtime target of an interface or virtual call.
- * Return nullptr if the runtime target cannot be proven.
- */
-static ArtMethod* FindVirtualOrInterfaceTarget(HInvoke* invoke, ArtMethod* resolved_method)
- SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
- if (IsMethodOrDeclaringClassFinal(resolved_method)) {
- // No need to lookup further, the resolved method will be the target.
- return resolved_method;
- }
-
- HInstruction* receiver = invoke->InputAt(0);
- if (receiver->IsNullCheck()) {
- // Due to multiple levels of inlining within the same pass, it might be that
- // null check does not have the reference type of the actual receiver.
- receiver = receiver->InputAt(0);
- }
- ReferenceTypeInfo info = receiver->GetReferenceTypeInfo();
- if (info.IsTop()) {
- // We have no information on the receiver.
- return nullptr;
- } else if (!info.IsExact()) {
- // We currently only support inlining with known receivers.
- // TODO: Remove this check, we should be able to inline final methods
- // on unknown receivers.
- return nullptr;
- } else if (info.GetTypeHandle()->IsInterface()) {
- // Statically knowing that the receiver has an interface type cannot
- // help us find what is the target method.
- return nullptr;
- }
-
- ClassLinker* cl = Runtime::Current()->GetClassLinker();
- size_t pointer_size = cl->GetImagePointerSize();
- if (invoke->IsInvokeInterface()) {
- resolved_method = info.GetTypeHandle()->FindVirtualMethodForInterface(
- resolved_method, pointer_size);
- } else {
- DCHECK(invoke->IsInvokeVirtual());
- resolved_method = info.GetTypeHandle()->FindVirtualMethodForVirtual(
- resolved_method, pointer_size);
- }
-
- if (resolved_method == nullptr) {
- // The information we had on the receiver was not enough to find
- // the target method. Since we check above the exact type of the receiver,
- // the only reason this can happen is an IncompatibleClassChangeError.
- return nullptr;
- } else if (resolved_method->IsAbstract()) {
- // The information we had on the receiver was not enough to find
- // the target method. Since we check above the exact type of the receiver,
- // the only reason this can happen is an IncompatibleClassChangeError.
- return nullptr;
- } else if (IsMethodOrDeclaringClassFinal(resolved_method)) {
- // A final method has to be the target method.
- return resolved_method;
- } else if (info.IsExact()) {
- // If we found a method and the receiver's concrete type is statically
- // known, we know for sure the target.
- return resolved_method;
- } else {
- // Even if we did find a method, the receiver type was not enough to
- // statically find the runtime target.
- return nullptr;
- }
-}
-
bool HInliner::TryInline(HInvoke* invoke_instruction,
uint32_t method_index,
InvokeType invoke_type) const {
@@ -157,34 +83,19 @@
const DexFile& caller_dex_file = *caller_compilation_unit_.GetDexFile();
VLOG(compiler) << "Try inlining " << PrettyMethod(method_index, caller_dex_file);
- ArtMethod* resolved_method = nullptr;
- {
- // Don't keep this handle scope on stack, otherwise we cannot do a reference type
- // propagation while inlining.
- StackHandleScope<2> hs(soa.Self());
- Handle<mirror::DexCache> dex_cache(
- hs.NewHandle(caller_compilation_unit_.GetClassLinker()->FindDexCache(caller_dex_file)));
- Handle<mirror::ClassLoader> class_loader(hs.NewHandle(
- soa.Decode<mirror::ClassLoader*>(caller_compilation_unit_.GetClassLoader())));
- resolved_method = compiler_driver_->ResolveMethod(
- soa, dex_cache, class_loader, &caller_compilation_unit_, method_index, invoke_type);
- }
+ StackHandleScope<3> hs(soa.Self());
+ Handle<mirror::DexCache> dex_cache(
+ hs.NewHandle(caller_compilation_unit_.GetClassLinker()->FindDexCache(caller_dex_file)));
+ Handle<mirror::ClassLoader> class_loader(hs.NewHandle(
+ soa.Decode<mirror::ClassLoader*>(caller_compilation_unit_.GetClassLoader())));
+ ArtMethod* resolved_method(compiler_driver_->ResolveMethod(
+ soa, dex_cache, class_loader, &caller_compilation_unit_, method_index, invoke_type));
if (resolved_method == nullptr) {
VLOG(compiler) << "Method cannot be resolved " << PrettyMethod(method_index, caller_dex_file);
return false;
}
- if (!invoke_instruction->IsInvokeStaticOrDirect()) {
- resolved_method = FindVirtualOrInterfaceTarget(invoke_instruction, resolved_method);
- if (resolved_method == nullptr) {
- VLOG(compiler) << "Interface or virtual call to "
- << PrettyMethod(method_index, caller_dex_file)
- << "could not be statically determined";
- return false;
- }
- }
-
bool same_dex_file = true;
const DexFile& outer_dex_file = *outer_compilation_unit_.GetDexFile();
if (resolved_method->GetDexFile()->GetLocation().compare(outer_dex_file.GetLocation()) != 0) {
@@ -327,13 +238,11 @@
// Run simple optimizations on the graph.
HDeadCodeElimination dce(callee_graph, stats_);
HConstantFolding fold(callee_graph);
- ReferenceTypePropagation type_propagation(callee_graph, handles_);
InstructionSimplifier simplify(callee_graph, stats_);
HOptimization* optimizations[] = {
&dce,
&fold,
- &type_propagation,
&simplify,
};
@@ -347,7 +256,6 @@
outer_compilation_unit_,
dex_compilation_unit,
compiler_driver_,
- handles_,
stats_,
depth_ + 1);
inliner.Run();