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Unified Diff: src/compiler/linkage-impl.h

Issue 530783002: Convert Linkage to use MachineSignature. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Rebase. Created 6 years, 3 months ago
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Index: src/compiler/linkage-impl.h
diff --git a/src/compiler/linkage-impl.h b/src/compiler/linkage-impl.h
index e2b7df0cf3a307316ad2a5a72c37605c403b3d69..e35f47c8e2e1053c47083ec7d8e53e2a521e8927 100644
--- a/src/compiler/linkage-impl.h
+++ b/src/compiler/linkage-impl.h
@@ -9,194 +9,215 @@ namespace v8 {
namespace internal {
namespace compiler {
+// TODO(titzer): replace uses of int with size_t in LinkageHelper.
+template <typename LinkageTraits>
class LinkageHelper {
public:
- static LinkageLocation TaggedStackSlot(int index) {
- DCHECK(index < 0);
- return LinkageLocation(kMachAnyTagged, index);
- }
-
- static LinkageLocation TaggedRegisterLocation(Register reg) {
- return LinkageLocation(kMachAnyTagged, Register::ToAllocationIndex(reg));
- }
-
- static inline LinkageLocation WordRegisterLocation(Register reg) {
- return LinkageLocation(kMachPtr, Register::ToAllocationIndex(reg));
- }
+ static const RegList kNoCalleeSaved = 0;
- static LinkageLocation UnconstrainedRegister(MachineType rep) {
- return LinkageLocation(rep, LinkageLocation::ANY_REGISTER);
+ static void AddReturnLocations(LocationSignature::Builder* locations) {
+ DCHECK(locations->return_count_ <= 2);
+ if (locations->return_count_ > 0) {
+ locations->AddReturn(regloc(LinkageTraits::ReturnValueReg()));
+ }
+ if (locations->return_count_ > 1) {
+ locations->AddReturn(regloc(LinkageTraits::ReturnValue2Reg()));
+ }
}
- static const RegList kNoCalleeSaved = 0;
-
// TODO(turbofan): cache call descriptors for JSFunction calls.
- template <typename LinkageTraits>
- static CallDescriptor* GetJSCallDescriptor(Zone* zone, int parameter_count) {
- const int jsfunction_count = 1;
- const int context_count = 1;
- int input_count = jsfunction_count + parameter_count + context_count;
-
- const int return_count = 1;
- LinkageLocation* locations =
- zone->NewArray<LinkageLocation>(return_count + input_count);
-
- int index = 0;
- locations[index++] =
- TaggedRegisterLocation(LinkageTraits::ReturnValueReg());
- locations[index++] =
- TaggedRegisterLocation(LinkageTraits::JSCallFunctionReg());
-
- for (int i = 0; i < parameter_count; i++) {
- // All parameters to JS calls go on the stack.
- int spill_slot_index = i - parameter_count;
- locations[index++] = TaggedStackSlot(spill_slot_index);
+ static CallDescriptor* GetJSCallDescriptor(Zone* zone,
+ int js_parameter_count) {
+ const size_t return_count = 1;
+ const size_t context_count = 1;
+ const size_t parameter_count = js_parameter_count + context_count;
+
+ LocationSignature::Builder locations(zone, return_count, parameter_count);
+ MachineSignature::Builder types(zone, return_count, parameter_count);
+
+ // Add returns.
+ AddReturnLocations(&locations);
+ for (size_t i = 0; i < return_count; i++) {
+ types.AddReturn(kMachAnyTagged);
}
- locations[index++] = TaggedRegisterLocation(LinkageTraits::ContextReg());
- // TODO(titzer): refactor TurboFan graph to consider context a value input.
- return new (zone)
- CallDescriptor(CallDescriptor::kCallJSFunction, // kind
- return_count, // return_count
- parameter_count, // parameter_count
- input_count - context_count, // input_count
- locations, // locations
- Operator::kNoProperties, // properties
- kNoCalleeSaved, // callee-saved registers
- CallDescriptor::kNeedsFrameState); // flags
+ // All parameters to JS calls go on the stack.
+ for (int i = 0; i < js_parameter_count; i++) {
+ int spill_slot_index = i - js_parameter_count;
+ locations.AddParam(stackloc(spill_slot_index));
+ types.AddParam(kMachAnyTagged);
+ }
+ // Add context.
+ locations.AddParam(regloc(LinkageTraits::ContextReg()));
+ types.AddParam(kMachAnyTagged);
+
+ // The target for JS function calls is the JSFunction object.
+ MachineType target_type = kMachAnyTagged;
+ LinkageLocation target_loc = regloc(LinkageTraits::JSCallFunctionReg());
+ return new (zone) CallDescriptor(CallDescriptor::kCallJSFunction, // kind
+ target_type, // target MachineType
+ target_loc, // target location
+ types.Build(), // machine_sig
+ locations.Build(), // location_sig
+ js_parameter_count, // js_parameter_count
+ Operator::kNoProperties, // properties
+ kNoCalleeSaved, // callee-saved
+ CallDescriptor::kNeedsFrameState, // flags
+ "js-call");
}
// TODO(turbofan): cache call descriptors for runtime calls.
- template <typename LinkageTraits>
static CallDescriptor* GetRuntimeCallDescriptor(
- Zone* zone, Runtime::FunctionId function_id, int parameter_count,
+ Zone* zone, Runtime::FunctionId function_id, int js_parameter_count,
Operator::Properties properties) {
- const int code_count = 1;
- const int function_count = 1;
- const int num_args_count = 1;
- const int context_count = 1;
- const int input_count = code_count + parameter_count + function_count +
- num_args_count + context_count;
+ const size_t function_count = 1;
+ const size_t num_args_count = 1;
+ const size_t context_count = 1;
+ const size_t parameter_count = function_count +
+ static_cast<size_t>(js_parameter_count) +
+ num_args_count + context_count;
const Runtime::Function* function = Runtime::FunctionForId(function_id);
- const int return_count = function->result_size;
- LinkageLocation* locations =
- zone->NewArray<LinkageLocation>(return_count + input_count);
-
- int index = 0;
- if (return_count > 0) {
- locations[index++] =
- TaggedRegisterLocation(LinkageTraits::ReturnValueReg());
- }
- if (return_count > 1) {
- locations[index++] =
- TaggedRegisterLocation(LinkageTraits::ReturnValue2Reg());
- }
+ const size_t return_count = static_cast<size_t>(function->result_size);
- DCHECK_LE(return_count, 2);
+ LocationSignature::Builder locations(zone, return_count, parameter_count);
+ MachineSignature::Builder types(zone, return_count, parameter_count);
- locations[index++] = UnconstrainedRegister(kMachAnyTagged); // CEntryStub
+ // Add returns.
+ AddReturnLocations(&locations);
+ for (size_t i = 0; i < return_count; i++) {
+ types.AddReturn(kMachAnyTagged);
+ }
- for (int i = 0; i < parameter_count; i++) {
- // All parameters to runtime calls go on the stack.
- int spill_slot_index = i - parameter_count;
- locations[index++] = TaggedStackSlot(spill_slot_index);
+ // All parameters to the runtime call go on the stack.
+ for (int i = 0; i < js_parameter_count; i++) {
+ locations.AddParam(stackloc(i - js_parameter_count));
+ types.AddParam(kMachAnyTagged);
}
- locations[index++] =
- TaggedRegisterLocation(LinkageTraits::RuntimeCallFunctionReg());
- locations[index++] =
- WordRegisterLocation(LinkageTraits::RuntimeCallArgCountReg());
- locations[index++] = TaggedRegisterLocation(LinkageTraits::ContextReg());
+ // Add runtime function itself.
+ locations.AddParam(regloc(LinkageTraits::RuntimeCallFunctionReg()));
+ types.AddParam(kMachAnyTagged);
+
+ // Add runtime call argument count.
+ locations.AddParam(regloc(LinkageTraits::RuntimeCallArgCountReg()));
+ types.AddParam(kMachPtr);
+
+ // Add context.
+ locations.AddParam(regloc(LinkageTraits::ContextReg()));
+ types.AddParam(kMachAnyTagged);
CallDescriptor::Flags flags = Linkage::NeedsFrameState(function_id)
? CallDescriptor::kNeedsFrameState
: CallDescriptor::kNoFlags;
- // TODO(titzer): refactor TurboFan graph to consider context a value input.
+ // The target for runtime calls is a code object.
+ MachineType target_type = kMachAnyTagged;
+ LinkageLocation target_loc = LinkageLocation::AnyRegister();
return new (zone) CallDescriptor(CallDescriptor::kCallCodeObject, // kind
- return_count, // return_count
- parameter_count, // parameter_count
- input_count, // input_count
- locations, // locations
- properties, // properties
- kNoCalleeSaved, // callee-saved registers
- flags, // flags
- function->name);
+ target_type, // target MachineType
+ target_loc, // target location
+ types.Build(), // machine_sig
+ locations.Build(), // location_sig
+ js_parameter_count, // js_parameter_count
+ properties, // properties
+ kNoCalleeSaved, // callee-saved
+ flags, // flags
+ function->name); // debug name
}
// TODO(turbofan): cache call descriptors for code stub calls.
- template <typename LinkageTraits>
static CallDescriptor* GetStubCallDescriptor(
Zone* zone, CodeStubInterfaceDescriptor* descriptor,
int stack_parameter_count, CallDescriptor::Flags flags) {
- int register_parameter_count = descriptor->GetEnvironmentParameterCount();
- int parameter_count = register_parameter_count + stack_parameter_count;
- const int code_count = 1;
+ const int register_parameter_count =
+ descriptor->GetEnvironmentParameterCount();
+ const int js_parameter_count =
+ register_parameter_count + stack_parameter_count;
const int context_count = 1;
- int input_count = code_count + parameter_count + context_count;
+ const size_t return_count = 1;
+ const size_t parameter_count =
+ static_cast<size_t>(js_parameter_count + context_count);
- const int return_count = 1;
- LinkageLocation* locations =
- zone->NewArray<LinkageLocation>(return_count + input_count);
+ LocationSignature::Builder locations(zone, return_count, parameter_count);
+ MachineSignature::Builder types(zone, return_count, parameter_count);
- int index = 0;
- locations[index++] =
- TaggedRegisterLocation(LinkageTraits::ReturnValueReg());
- locations[index++] = UnconstrainedRegister(kMachAnyTagged); // code
- for (int i = 0; i < parameter_count; i++) {
+ // Add return location.
+ AddReturnLocations(&locations);
+ types.AddReturn(kMachAnyTagged);
+
+ // Add parameters in registers and on the stack.
+ for (int i = 0; i < js_parameter_count; i++) {
if (i < register_parameter_count) {
- // The first parameters to code stub calls go in registers.
+ // The first parameters go in registers.
Register reg = descriptor->GetEnvironmentParameterRegister(i);
- locations[index++] = TaggedRegisterLocation(reg);
+ locations.AddParam(regloc(reg));
} else {
// The rest of the parameters go on the stack.
int stack_slot = i - register_parameter_count - stack_parameter_count;
- locations[index++] = TaggedStackSlot(stack_slot);
+ locations.AddParam(stackloc(stack_slot));
}
+ types.AddParam(kMachAnyTagged);
}
- locations[index++] = TaggedRegisterLocation(LinkageTraits::ContextReg());
+ // Add context.
+ locations.AddParam(regloc(LinkageTraits::ContextReg()));
+ types.AddParam(kMachAnyTagged);
- // TODO(titzer): refactor TurboFan graph to consider context a value input.
+ // The target for stub calls is a code object.
+ MachineType target_type = kMachAnyTagged;
+ LinkageLocation target_loc = LinkageLocation::AnyRegister();
return new (zone)
CallDescriptor(CallDescriptor::kCallCodeObject, // kind
- return_count, // return_count
- parameter_count, // parameter_count
- input_count, // input_count
- locations, // locations
+ target_type, // target MachineType
+ target_loc, // target location
+ types.Build(), // machine_sig
+ locations.Build(), // location_sig
+ js_parameter_count, // js_parameter_count
Operator::kNoProperties, // properties
kNoCalleeSaved, // callee-saved registers
flags, // flags
CodeStub::MajorName(descriptor->MajorKey(), false));
}
+ static CallDescriptor* GetSimplifiedCDescriptor(Zone* zone,
+ MachineSignature* msig) {
+ LocationSignature::Builder locations(zone, msig->return_count(),
+ msig->parameter_count());
+ // Add return location(s).
+ AddReturnLocations(&locations);
- template <typename LinkageTraits>
- static CallDescriptor* GetSimplifiedCDescriptor(
- Zone* zone, int num_params, MachineType return_type,
- const MachineType* param_types) {
- LinkageLocation* locations =
- zone->NewArray<LinkageLocation>(num_params + 2);
- int index = 0;
- locations[index++] =
- TaggedRegisterLocation(LinkageTraits::ReturnValueReg());
- locations[index++] = LinkageHelper::UnconstrainedRegister(kMachPtr);
- // TODO(dcarney): test with lots of parameters.
- int i = 0;
- for (; i < LinkageTraits::CRegisterParametersLength() && i < num_params;
- i++) {
- locations[index++] = LinkageLocation(
- param_types[i],
- Register::ToAllocationIndex(LinkageTraits::CRegisterParameter(i)));
- }
- for (; i < num_params; i++) {
- locations[index++] = LinkageLocation(param_types[i], -1 - i);
+ // Add register and/or stack parameter(s).
+ const int parameter_count = static_cast<int>(msig->parameter_count());
+ for (int i = 0; i < parameter_count; i++) {
+ if (i < LinkageTraits::CRegisterParametersLength()) {
+ locations.AddParam(regloc(LinkageTraits::CRegisterParameter(i)));
+ } else {
+ locations.AddParam(stackloc(-1 - i));
+ }
}
- return new (zone) CallDescriptor(
- CallDescriptor::kCallAddress, 1, num_params, num_params + 1, locations,
- Operator::kNoProperties, LinkageTraits::CCalleeSaveRegisters(),
- CallDescriptor::kNoFlags); // TODO(jarin) should deoptimize!
+
+ // The target for C calls is always an address (i.e. machine pointer).
+ MachineType target_type = kMachPtr;
+ LinkageLocation target_loc = LinkageLocation::AnyRegister();
+ return new (zone) CallDescriptor(CallDescriptor::kCallAddress, // kind
+ target_type, // target MachineType
+ target_loc, // target location
+ msig, // machine_sig
+ locations.Build(), // location_sig
+ 0, // js_parameter_count
+ Operator::kNoProperties, // properties
+ LinkageTraits::CCalleeSaveRegisters(),
+ CallDescriptor::kNoFlags, "c-call");
+ }
+
+ static LinkageLocation regloc(Register reg) {
+ return LinkageLocation(Register::ToAllocationIndex(reg));
+ }
+
+ static LinkageLocation stackloc(int i) {
+ DCHECK_LT(i, 0);
+ return LinkageLocation(i);
}
};
} // namespace compiler
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