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PPC/s390: Reland: [TypeFeedbackVector] Store optimized code in the vector

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Port 11a211ff1b
Port 663a8ef470

Original Commit Message:

    Since the feedback vector is itself a native context structure, why
    not store optimized code for a function in there rather than in
    a map from native context to code? This allows us to get rid of
    the optimized code map in the SharedFunctionInfo, saving a pointer,
    and making lookup of any optimized code quicker.

    Original patch by Michael Stanton <mvstanton@chromium.org>

R=rmcilroy@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=v8:6246,chromium:718891
LOG=N

Review-Url: https://codereview.chromium.org/2892663002
Cr-Commit-Position: refs/heads/master@{#45385}
This commit is contained in:
bjaideep 2017-05-17 15:11:51 -07:00 committed by Commit bot
parent ea55b873f2
commit d4da5cb41f
2 changed files with 39 additions and 106 deletions
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69
src/builtins/ppc/builtins-ppc.cc
View File

@ -1397,10 +1397,8 @@ void Builtins::Generate_CompileLazy(MacroAssembler* masm) {
// First lookup code, maybe we don't need to compile!
Label gotta_call_runtime;
Label try_shared;
Label loop_top, loop_bottom;
Register closure = r4;
Register map = r9;
Register index = r5;
// Do we have a valid feedback vector?
@ -1408,58 +1406,35 @@ void Builtins::Generate_CompileLazy(MacroAssembler* masm) {
__ LoadP(index, FieldMemOperand(index, Cell::kValueOffset));
__ JumpIfRoot(index, Heap::kUndefinedValueRootIndex, &gotta_call_runtime);
__ LoadP(map,
FieldMemOperand(closure, JSFunction::kSharedFunctionInfoOffset));
__ LoadP(map,
FieldMemOperand(map, SharedFunctionInfo::kOptimizedCodeMapOffset));
__ LoadP(index, FieldMemOperand(map, FixedArray::kLengthOffset));
__ CmpSmiLiteral(index, Smi::FromInt(2), r0);
__ blt(&try_shared);
// r10 : native context
// r5 : length / index
// r9 : optimized code map
// r6 : new target
// r4 : closure
Register native_context = r10;
__ LoadP(native_context, NativeContextMemOperand());
__ bind(&loop_top);
Register temp = r11;
Register array_pointer = r8;
// Does the native context match?
__ SmiToPtrArrayOffset(array_pointer, index);
__ add(array_pointer, map, array_pointer);
__ LoadP(temp, FieldMemOperand(array_pointer,
SharedFunctionInfo::kOffsetToPreviousContext));
__ LoadP(temp, FieldMemOperand(temp, WeakCell::kValueOffset));
__ cmp(temp, native_context);
__ bne(&loop_bottom);
// Code available?
// Is optimized code available in the feedback vector?
Register entry = r7;
__ LoadP(entry,
FieldMemOperand(array_pointer,
SharedFunctionInfo::kOffsetToPreviousCachedCode));
__ LoadP(entry, FieldMemOperand(index, FeedbackVector::kOptimizedCodeIndex *
kPointerSize +
FeedbackVector::kHeaderSize));
__ LoadP(entry, FieldMemOperand(entry, WeakCell::kValueOffset));
__ JumpIfSmi(entry, &try_shared);
// Found code. Get it into the closure and return.
// Store code entry in the closure.
// Found code, check if it is marked for deopt, if so call into runtime to
// clear the optimized code slot.
__ lbz(r8, FieldMemOperand(entry, Code::kKindSpecificFlags1Offset));
__ TestBit(r8, Code::kMarkedForDeoptimizationBit, r0);
__ bne(&gotta_call_runtime, cr0);
// Code is good, get it into the closure and tail call.
__ addi(entry, entry, Operand(Code::kHeaderSize - kHeapObjectTag));
__ StoreP(entry, FieldMemOperand(closure, JSFunction::kCodeEntryOffset), r0);
__ RecordWriteCodeEntryField(closure, entry, r8);
// Load native context into r9.
Register native_context = r9;
__ LoadP(native_context, NativeContextMemOperand());
// Link the closure into the optimized function list.
// r7 : code entry
// r10: native context
// r4 : closure
__ LoadP(
r8, ContextMemOperand(native_context, Context::OPTIMIZED_FUNCTIONS_LIST));
__ StoreP(r8, FieldMemOperand(closure, JSFunction::kNextFunctionLinkOffset),
r0);
__ RecordWriteField(closure, JSFunction::kNextFunctionLinkOffset, r8, temp,
__ RecordWriteField(closure, JSFunction::kNextFunctionLinkOffset, r8, r5,
kLRHasNotBeenSaved, kDontSaveFPRegs, EMIT_REMEMBERED_SET,
OMIT_SMI_CHECK);
const int function_list_offset =
@ -1469,19 +1444,11 @@ void Builtins::Generate_CompileLazy(MacroAssembler* masm) {
ContextMemOperand(native_context, Context::OPTIMIZED_FUNCTIONS_LIST), r0);
// Save closure before the write barrier.
__ mr(r8, closure);
__ RecordWriteContextSlot(native_context, function_list_offset, r8, temp,
__ RecordWriteContextSlot(native_context, function_list_offset, r8, r5,
kLRHasNotBeenSaved, kDontSaveFPRegs);
__ JumpToJSEntry(entry);
__ bind(&loop_bottom);
__ SubSmiLiteral(index, index, Smi::FromInt(SharedFunctionInfo::kEntryLength),
r0);
__ CmpSmiLiteral(index, Smi::FromInt(1), r0);
__ bgt(&loop_top);
// We found no code.
__ b(&gotta_call_runtime);
// We found no optimized code.
__ bind(&try_shared);
__ LoadP(entry,
FieldMemOperand(closure, JSFunction::kSharedFunctionInfoOffset));

76
src/builtins/s390/builtins-s390.cc
View File

@ -1389,10 +1389,8 @@ void Builtins::Generate_CompileLazy(MacroAssembler* masm) {
// First lookup code, maybe we don't need to compile!
Label gotta_call_runtime;
Label try_shared;
Label loop_top, loop_bottom;
Register closure = r3;
Register map = r8;
Register index = r4;
// Do we have a valid feedback vector?
@ -1400,59 +1398,35 @@ void Builtins::Generate_CompileLazy(MacroAssembler* masm) {
__ LoadP(index, FieldMemOperand(index, Cell::kValueOffset));
__ JumpIfRoot(index, Heap::kUndefinedValueRootIndex, &gotta_call_runtime);
__ LoadP(map,
FieldMemOperand(closure, JSFunction::kSharedFunctionInfoOffset));
__ LoadP(map,
FieldMemOperand(map, SharedFunctionInfo::kOptimizedCodeMapOffset));
__ LoadP(index, FieldMemOperand(map, FixedArray::kLengthOffset));
__ CmpSmiLiteral(index, Smi::FromInt(2), r0);
__ blt(&try_shared);
// Find literals.
// r9 : native context
// r4 : length / index
// r8 : optimized code map
// r5 : new target
// r3 : closure
Register native_context = r9;
__ LoadP(native_context, NativeContextMemOperand());
__ bind(&loop_top);
Register temp = r1;
Register array_pointer = r7;
// Does the native context match?
__ SmiToPtrArrayOffset(array_pointer, index);
__ AddP(array_pointer, map, array_pointer);
__ LoadP(temp, FieldMemOperand(array_pointer,
SharedFunctionInfo::kOffsetToPreviousContext));
__ LoadP(temp, FieldMemOperand(temp, WeakCell::kValueOffset));
__ CmpP(temp, native_context);
__ bne(&loop_bottom, Label::kNear);
// Code available?
// Is optimized code available in the feedback vector?
Register entry = r6;
__ LoadP(entry,
FieldMemOperand(array_pointer,
SharedFunctionInfo::kOffsetToPreviousCachedCode));
__ LoadP(entry, FieldMemOperand(index, FeedbackVector::kOptimizedCodeIndex *
kPointerSize +
FeedbackVector::kHeaderSize));
__ LoadP(entry, FieldMemOperand(entry, WeakCell::kValueOffset));
__ JumpIfSmi(entry, &try_shared);
// Found code. Get it into the closure and return.
// Store code entry in the closure.
// Found code, check if it is marked for deopt, if so call into runtime to
// clear the optimized code slot.
__ LoadlB(r7, FieldMemOperand(entry, Code::kKindSpecificFlags1Offset));
__ tmll(r7, Operand(Code::kMarkedForDeoptimizationBit));
__ bne(&gotta_call_runtime);
// Code is good, get it into the closure and tail call.
__ AddP(entry, entry, Operand(Code::kHeaderSize - kHeapObjectTag));
__ StoreP(entry, FieldMemOperand(closure, JSFunction::kCodeEntryOffset), r0);
__ RecordWriteCodeEntryField(closure, entry, r7);
// Load native context into r8.
Register native_context = r8;
__ LoadP(native_context, NativeContextMemOperand());
// Link the closure into the optimized function list.
// r6 : code entry
// r9: native context
// r3 : closure
__ LoadP(
r7, ContextMemOperand(native_context, Context::OPTIMIZED_FUNCTIONS_LIST));
__ StoreP(r7, FieldMemOperand(closure, JSFunction::kNextFunctionLinkOffset),
r0);
__ RecordWriteField(closure, JSFunction::kNextFunctionLinkOffset, r7, temp,
__ RecordWriteField(closure, JSFunction::kNextFunctionLinkOffset, r7, r4,
kLRHasNotBeenSaved, kDontSaveFPRegs, EMIT_REMEMBERED_SET,
OMIT_SMI_CHECK);
const int function_list_offset =
@ -1462,26 +1436,18 @@ void Builtins::Generate_CompileLazy(MacroAssembler* masm) {
ContextMemOperand(native_context, Context::OPTIMIZED_FUNCTIONS_LIST), r0);
// Save closure before the write barrier.
__ LoadRR(r7, closure);
__ RecordWriteContextSlot(native_context, function_list_offset, r7, temp,
__ RecordWriteContextSlot(native_context, function_list_offset, r7, r4,
kLRHasNotBeenSaved, kDontSaveFPRegs);
__ JumpToJSEntry(entry);
__ bind(&loop_bottom);
__ SubSmiLiteral(index, index, Smi::FromInt(SharedFunctionInfo::kEntryLength),
r0);
__ CmpSmiLiteral(index, Smi::FromInt(1), r0);
__ bgt(&loop_top);
// We found no code.
__ b(&gotta_call_runtime);
// We found no optimized code.
__ bind(&try_shared);
__ LoadP(entry,
FieldMemOperand(closure, JSFunction::kSharedFunctionInfoOffset));
// Is the shared function marked for tier up?
__ LoadlB(temp, FieldMemOperand(
entry, SharedFunctionInfo::kMarkedForTierUpByteOffset));
__ TestBit(temp, SharedFunctionInfo::kMarkedForTierUpBitWithinByte, r0);
__ LoadlB(r7, FieldMemOperand(
entry, SharedFunctionInfo::kMarkedForTierUpByteOffset));
__ TestBit(r7, SharedFunctionInfo::kMarkedForTierUpBitWithinByte, r0);
__ bne(&gotta_call_runtime);
// If SFI points to anything other than CompileLazy, install that.