summaryrefslogtreecommitdiff
path: root/compiler/optimizing
diff options
context:
space:
mode:
Diffstat (limited to 'compiler/optimizing')
-rw-r--r--compiler/optimizing/builder.cc14
-rw-r--r--compiler/optimizing/inliner.cc20
-rw-r--r--compiler/optimizing/nodes.h10
-rw-r--r--compiler/optimizing/optimizing_compiler.cc7
-rw-r--r--compiler/optimizing/optimizing_unit_test.h2
5 files changed, 43 insertions, 10 deletions
diff --git a/compiler/optimizing/builder.cc b/compiler/optimizing/builder.cc
index a5c6f23343..c4eaabf899 100644
--- a/compiler/optimizing/builder.cc
+++ b/compiler/optimizing/builder.cc
@@ -539,11 +539,6 @@ void HGraphBuilder::Binop_22b(const Instruction& instruction, bool reverse) {
}
static bool RequiresConstructorBarrier(const DexCompilationUnit* cu, const CompilerDriver& driver) {
- // dex compilation unit is null only when unit testing.
- if (cu == nullptr) {
- return false;
- }
-
Thread* self = Thread::Current();
return cu->IsConstructor()
&& driver.RequiresConstructorBarrier(self, cu->GetDexFile(), cu->GetClassDefIndex());
@@ -551,9 +546,12 @@ static bool RequiresConstructorBarrier(const DexCompilationUnit* cu, const Compi
void HGraphBuilder::BuildReturn(const Instruction& instruction, Primitive::Type type) {
if (type == Primitive::kPrimVoid) {
- // Note that we might insert redundant barriers when inlining `super` calls.
- // TODO: add a data flow analysis to get rid of duplicate barriers.
- if (RequiresConstructorBarrier(dex_compilation_unit_, *compiler_driver_)) {
+ if (graph_->ShouldGenerateConstructorBarrier()) {
+ // The compilation unit is null during testing.
+ if (dex_compilation_unit_ != nullptr) {
+ DCHECK(RequiresConstructorBarrier(dex_compilation_unit_, *compiler_driver_))
+ << "Inconsistent use of ShouldGenerateConstructorBarrier. Should not generate a barrier.";
+ }
current_block_->AddInstruction(new (arena_) HMemoryBarrier(kStoreStore));
}
current_block_->AddInstruction(new (arena_) HReturnVoid());
diff --git a/compiler/optimizing/inliner.cc b/compiler/optimizing/inliner.cc
index afffc7ab4f..56d868f116 100644
--- a/compiler/optimizing/inliner.cc
+++ b/compiler/optimizing/inliner.cc
@@ -169,10 +169,30 @@ bool HInliner::TryBuildAndInline(Handle<mirror::ArtMethod> resolved_method,
resolved_method->GetAccessFlags(),
nullptr);
+ bool requires_ctor_barrier = false;
+
+ if (dex_compilation_unit.IsConstructor()) {
+ // If it's a super invocation and we already generate a barrier there's no need
+ // to generate another one.
+ // We identify super calls by looking at the "this" pointer. If its value is the
+ // same as the local "this" pointer then we must have a super invocation.
+ bool is_super_invocation = invoke_instruction->InputAt(0)->IsParameterValue()
+ && invoke_instruction->InputAt(0)->AsParameterValue()->IsThis();
+ if (is_super_invocation && graph_->ShouldGenerateConstructorBarrier()) {
+ requires_ctor_barrier = false;
+ } else {
+ Thread* self = Thread::Current();
+ requires_ctor_barrier = compiler_driver_->RequiresConstructorBarrier(self,
+ dex_compilation_unit.GetDexFile(),
+ dex_compilation_unit.GetClassDefIndex());
+ }
+ }
+
HGraph* callee_graph = new (graph_->GetArena()) HGraph(
graph_->GetArena(),
caller_dex_file,
method_index,
+ requires_ctor_barrier,
graph_->IsDebuggable(),
graph_->GetCurrentInstructionId());
diff --git a/compiler/optimizing/nodes.h b/compiler/optimizing/nodes.h
index cb2e5ccab4..0291992cab 100644
--- a/compiler/optimizing/nodes.h
+++ b/compiler/optimizing/nodes.h
@@ -120,6 +120,7 @@ class HGraph : public ArenaObject<kArenaAllocMisc> {
HGraph(ArenaAllocator* arena,
const DexFile& dex_file,
uint32_t method_idx,
+ bool should_generate_constructor_barrier,
bool debuggable = false,
int start_instruction_id = 0)
: arena_(arena),
@@ -137,6 +138,7 @@ class HGraph : public ArenaObject<kArenaAllocMisc> {
current_instruction_id_(start_instruction_id),
dex_file_(dex_file),
method_idx_(method_idx),
+ should_generate_constructor_barrier_(should_generate_constructor_barrier),
cached_null_constant_(nullptr),
cached_int_constants_(std::less<int32_t>(), arena->Adapter()),
cached_float_constants_(std::less<int32_t>(), arena->Adapter()),
@@ -247,6 +249,10 @@ class HGraph : public ArenaObject<kArenaAllocMisc> {
has_bounds_checks_ = value;
}
+ bool ShouldGenerateConstructorBarrier() const {
+ return should_generate_constructor_barrier_;
+ }
+
bool IsDebuggable() const { return debuggable_; }
// Returns a constant of the given type and value. If it does not exist
@@ -359,6 +365,8 @@ class HGraph : public ArenaObject<kArenaAllocMisc> {
// The method index in the dex file.
const uint32_t method_idx_;
+ const bool should_generate_constructor_barrier_;
+
// Cached constants.
HNullConstant* cached_null_constant_;
ArenaSafeMap<int32_t, HIntConstant*> cached_int_constants_;
@@ -2902,6 +2910,8 @@ class HParameterValue : public HExpression<0> {
bool CanBeNull() const OVERRIDE { return !is_this_; }
+ bool IsThis() const { return is_this_; }
+
DECLARE_INSTRUCTION(ParameterValue);
private:
diff --git a/compiler/optimizing/optimizing_compiler.cc b/compiler/optimizing/optimizing_compiler.cc
index 8bb5d8ebae..be9a42425b 100644
--- a/compiler/optimizing/optimizing_compiler.cc
+++ b/compiler/optimizing/optimizing_compiler.cc
@@ -512,9 +512,14 @@ CompiledMethod* OptimizingCompiler::TryCompile(const DexFile::CodeItem* code_ite
class_def_idx, method_idx, access_flags,
compiler_driver->GetVerifiedMethod(&dex_file, method_idx));
+ bool requires_barrier = dex_compilation_unit.IsConstructor()
+ && compiler_driver->RequiresConstructorBarrier(Thread::Current(),
+ dex_compilation_unit.GetDexFile(),
+ dex_compilation_unit.GetClassDefIndex());
ArenaAllocator arena(Runtime::Current()->GetArenaPool());
HGraph* graph = new (&arena) HGraph(
- &arena, dex_file, method_idx, compiler_driver->GetCompilerOptions().GetDebuggable());
+ &arena, dex_file, method_idx, requires_barrier,
+ compiler_driver->GetCompilerOptions().GetDebuggable());
// For testing purposes, we put a special marker on method names that should be compiled
// with this compiler. This makes sure we're not regressing.
diff --git a/compiler/optimizing/optimizing_unit_test.h b/compiler/optimizing/optimizing_unit_test.h
index 4f8ec65e43..1fe9346b0f 100644
--- a/compiler/optimizing/optimizing_unit_test.h
+++ b/compiler/optimizing/optimizing_unit_test.h
@@ -74,7 +74,7 @@ void RemoveSuspendChecks(HGraph* graph) {
inline HGraph* CreateGraph(ArenaAllocator* allocator) {
return new (allocator) HGraph(
- allocator, *reinterpret_cast<DexFile*>(allocator->Alloc(sizeof(DexFile))), -1);
+ allocator, *reinterpret_cast<DexFile*>(allocator->Alloc(sizeof(DexFile))), -1, false);
}
// Create a control-flow graph from Dex instructions.
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2025-10-21 15:55:28 +0000