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Unified Diff: runtime/vm/instructions_arm64.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/instructions_arm64.cc
diff --git a/runtime/vm/instructions_arm64.cc b/runtime/vm/instructions_arm64.cc
index 62b3ff224b97eea38d1c06a94e3c9d5031e4ecea..a7e585384887c11817f3835b2c4e6dfb89f90cf5 100644
--- a/runtime/vm/instructions_arm64.cc
+++ b/runtime/vm/instructions_arm64.cc
@@ -329,6 +329,45 @@ void CallPattern::InsertDeoptCallAt(uword pc, uword target_address) {
}
+SwitchableCallPattern::SwitchableCallPattern(uword pc, const Code& code)
+ : object_pool_(ObjectPool::Handle(code.GetObjectPool())),
+ cache_pool_index_(-1),
+ stub_pool_index_(-1) {
+ ASSERT(code.ContainsInstructionAt(pc));
+ // Last instruction: blr r1.
+ ASSERT(*(reinterpret_cast<uint32_t*>(pc) - 1) == 0xd63f0020);
+
+ Register reg;
+ uword stub_load_end =
+ InstructionPattern::DecodeLoadWordFromPool(pc - 3 * Instr::kInstrSize,
+ &reg,
+ &stub_pool_index_);
+ ASSERT(reg == CODE_REG);
+ InstructionPattern::DecodeLoadWordFromPool(stub_load_end,
+ &reg,
+ &cache_pool_index_);
+ ASSERT(reg == R5);
+}
+
+
+RawObject* SwitchableCallPattern::cache() const {
+ return reinterpret_cast<RawCode*>(
+ object_pool_.ObjectAt(cache_pool_index_));
+}
+
+
+void SwitchableCallPattern::SetCache(const MegamorphicCache& cache) const {
+ ASSERT(Object::Handle(object_pool_.ObjectAt(cache_pool_index_)).IsICData());
+ object_pool_.SetObjectAt(cache_pool_index_, cache);
+}
+
+
+void SwitchableCallPattern::SetLookupStub(const Code& lookup_stub) const {
+ ASSERT(Object::Handle(object_pool_.ObjectAt(stub_pool_index_)).IsCode());
+ object_pool_.SetObjectAt(stub_pool_index_, lookup_stub);
+}
+
+
ReturnPattern::ReturnPattern(uword pc)
: pc_(pc) {
}
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