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Unified Diff: runtime/vm/flow_graph_compiler_arm.cc

Issue 1418863003: Precompilation: Generate instance calls as IC calls that can switch to Megamoprhic calls. (Closed) Base URL: git@github.com:dart-lang/sdk.git@master
Patch Set: Created 5 years, 1 month ago
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Index: runtime/vm/flow_graph_compiler_arm.cc
diff --git a/runtime/vm/flow_graph_compiler_arm.cc b/runtime/vm/flow_graph_compiler_arm.cc
index fb944158a288ae7bf25e39355ce918120207a599..a11916db9e64fb4dc09567874900d56c39d8a174 100644
--- a/runtime/vm/flow_graph_compiler_arm.cc
+++ b/runtime/vm/flow_graph_compiler_arm.cc
@@ -1265,20 +1265,57 @@ void FlowGraphCompiler::EmitMegamorphicInstanceCall(
ASSERT(!arguments_descriptor.IsNull() && (arguments_descriptor.Length() > 0));
const MegamorphicCache& cache = MegamorphicCache::ZoneHandle(zone(),
MegamorphicCacheTable::Lookup(isolate(), name, arguments_descriptor));
- const Register receiverR = R0;
- const Register cacheR = R1;
- const Register targetR = R1;
- __ LoadFromOffset(kWord, receiverR, SP, (argument_count - 1) * kWordSize);
- __ LoadObject(cacheR, cache);
+ __ Comment("MegamorphicCall");
+ __ LoadFromOffset(kWord, R0, SP, (argument_count - 1) * kWordSize);
+ __ LoadObject(R9, cache);
if (FLAG_use_megamorphic_stub) {
__ BranchLink(*StubCode::MegamorphicLookup_entry());
- } else {
- StubCode::EmitMegamorphicLookup(assembler(), receiverR, cacheR, targetR);
+ } else {
+ StubCode::EmitMegamorphicLookup(assembler());
}
- __ LoadObject(R9, ic_data);
- __ LoadObject(R4, arguments_descriptor);
- __ blx(targetR);
+ __ blx(R1);
+
+ AddCurrentDescriptor(RawPcDescriptors::kOther, Thread::kNoDeoptId, token_pos);
+ RecordSafepoint(locs);
+ const intptr_t deopt_id_after = Thread::ToDeoptAfter(deopt_id);
+ if (is_optimizing()) {
+ AddDeoptIndexAtCall(deopt_id_after, token_pos);
+ } else {
+ // Add deoptimization continuation point after the call and before the
+ // arguments are removed.
+ AddCurrentDescriptor(RawPcDescriptors::kDeopt,
+ deopt_id_after, token_pos);
+ }
+ __ Drop(argument_count);
+}
+
+
+void FlowGraphCompiler::EmitSwitchableInstanceCall(
+ const ICData& ic_data,
+ intptr_t argument_count,
+ intptr_t deopt_id,
+ intptr_t token_pos,
+ LocationSummary* locs) {
+ __ Comment("SwitchableCall");
+ __ LoadFromOffset(kWord, R0, SP, (argument_count - 1) * kWordSize);
+ if (ic_data.NumArgsTested() == 1) {
+ __ LoadUniqueObject(R9, ic_data);
+ __ BranchLinkPatchable(*StubCode::ICLookup_entry());
+ } else {
+ const String& name = String::Handle(zone(), ic_data.target_name());
+ const Array& arguments_descriptor =
+ Array::ZoneHandle(zone(), ic_data.arguments_descriptor());
+ ASSERT(!arguments_descriptor.IsNull() &&
+ (arguments_descriptor.Length() > 0));
+ const MegamorphicCache& cache = MegamorphicCache::ZoneHandle(zone(),
+ MegamorphicCacheTable::Lookup(isolate(), name, arguments_descriptor));
+
+ __ LoadUniqueObject(R9, cache);
+ __ BranchLinkPatchable(*StubCode::MegamorphicLookup_entry());
+ }
+ __ blx(R1);
+
AddCurrentDescriptor(RawPcDescriptors::kOther, Thread::kNoDeoptId, token_pos);
RecordSafepoint(locs);
const intptr_t deopt_id_after = Thread::ToDeoptAfter(deopt_id);
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