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Unified Diff: src/mips64/builtins-mips64.cc

Issue 1203813002: [es6] Make new.target work in functions (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Add test again. It got lost in last patchset Created 5 years, 6 months ago
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Index: src/mips64/builtins-mips64.cc
diff --git a/src/mips64/builtins-mips64.cc b/src/mips64/builtins-mips64.cc
index c63d92d69d1d820e60454b4091e6647c757f2b7b..8243c5d81309398ea537be996d58999de1433cf4 100644
--- a/src/mips64/builtins-mips64.cc
+++ b/src/mips64/builtins-mips64.cc
@@ -347,6 +347,7 @@ static void Generate_Runtime_NewObject(MacroAssembler* masm,
static void Generate_JSConstructStubHelper(MacroAssembler* masm,
bool is_api_function,
+ bool use_new_target,
bool create_memento) {
// ----------- S t a t e -------------
// -- a0 : number of arguments
@@ -378,10 +379,13 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
__ push(a2);
}
- // Preserve the two incoming parameters on the stack.
- // Tag arguments count.
- __ dsll32(a0, a0, 0);
- __ MultiPushReversed(a0.bit() | a1.bit());
+ // Preserve the incoming parameters on the stack.
+ __ SmiTag(a0);
+ if (use_new_target) {
+ __ Push(a0, a1, a3);
+ } else {
+ __ Push(a0, a1);
+ }
Label rt_call, allocated, normal_new, count_incremented;
__ Branch(&normal_new, eq, a1, Operand(a3));
@@ -636,7 +640,8 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
__ bind(&allocated);
if (create_memento) {
- __ ld(a2, MemOperand(sp, kPointerSize * 2));
+ int offset = (use_new_target ? 3 : 2) * kPointerSize;
+ __ ld(a2, MemOperand(sp, offset));
__ LoadRoot(t1, Heap::kUndefinedValueRootIndex);
__ Branch(&count_incremented, eq, a2, Operand(t1));
// a2 is an AllocationSite. We are creating a memento from it, so we
@@ -649,22 +654,24 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
__ bind(&count_incremented);
}
+ // Restore the parameters.
+ if (use_new_target) {
+ __ Pop(a3); // new.target
+ }
__ Pop(a1);
- __ Push(t0, t0);
+ __ ld(a0, MemOperand(sp));
+ __ SmiUntag(a0);
- // Reload the number of arguments from the stack.
- // sp[0]: receiver
- // sp[1]: receiver
- // sp[2]: number of arguments (smi-tagged)
- __ ld(a3, MemOperand(sp, 2 * kPointerSize));
+ if (use_new_target) {
+ __ Push(a3, t0, t0);
+ } else {
+ __ Push(t0, t0);
+ }
// Set up pointer to last argument.
__ Daddu(a2, fp, Operand(StandardFrameConstants::kCallerSPOffset));
- // Set up number of arguments for function call below.
- __ SmiUntag(a0, a3);
-
// Copy arguments and receiver to the expression stack.
// a0: number of arguments
// a1: constructor function
@@ -672,9 +679,10 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
// a3: number of arguments (smi-tagged)
// sp[0]: receiver
// sp[1]: receiver
- // sp[2]: number of arguments (smi-tagged)
+ // sp[2]: new.target (if used)
+ // sp[2/3]: number of arguments (smi-tagged)
Label loop, entry;
- __ SmiUntag(a3);
+ __ mov(a3, a0);
__ jmp(&entry);
__ bind(&loop);
__ dsll(a4, a3, kPointerSizeLog2);
@@ -699,7 +707,9 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
}
// Store offset of return address for deoptimizer.
- if (!is_api_function) {
+ // TODO(arv): Remove the "!use_new_target" before supporting optimization
+ // of functions that reference new.target
+ if (!is_api_function && !use_new_target) {
masm->isolate()->heap()->SetConstructStubDeoptPCOffset(masm->pc_offset());
}
@@ -714,7 +724,8 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
// If the result is a smi, it is *not* an object in the ECMA sense.
// v0: result
// sp[0]: receiver (newly allocated object)
- // sp[1]: number of arguments (smi-tagged)
+ // sp[1]: new.target (if used)
+ // sp[1/2]: number of arguments (smi-tagged)
__ JumpIfSmi(v0, &use_receiver);
// If the type of the result (stored in its map) is less than
@@ -732,8 +743,10 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
__ bind(&exit);
// v0: result
// sp[0]: receiver (newly allocated object)
- // sp[1]: number of arguments (smi-tagged)
- __ ld(a1, MemOperand(sp, kPointerSize));
+ // sp[1]: new.target (if used)
+ // sp[1/2]: number of arguments (smi-tagged)
+ int offset = (use_new_target ? 2 : 1) * kPointerSize;
+ __ ld(a1, MemOperand(sp, offset));
// Leave construct frame.
}
@@ -747,12 +760,17 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
- Generate_JSConstructStubHelper(masm, false, FLAG_pretenuring_call_new);
+ Generate_JSConstructStubHelper(masm, false, false, FLAG_pretenuring_call_new);
}
void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) {
- Generate_JSConstructStubHelper(masm, true, false);
+ Generate_JSConstructStubHelper(masm, true, false, false);
+}
+
+
+void Builtins::Generate_JSConstructStubNewTarget(MacroAssembler* masm) {
+ Generate_JSConstructStubHelper(masm, false, true, FLAG_pretenuring_call_new);
}
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