Collect type feedback on result of Math.[round|ceil|floor]

src/x64/code-stubs-x64.cc

Index: src/x64/code-stubs-x64.cc
diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc
index 401db6b3fbfc6af98c7f0e3eee01997106eb3127..0024d228f5b13c1e11a0047a40d9c7923b812cbe 100644
--- a/src/x64/code-stubs-x64.cc
+++ b/src/x64/code-stubs-x64.cc
@@ -2144,6 +2144,161 @@ void CallIC_ArrayStub::Generate(MacroAssembler* masm) {
 }
 
 
+void CallIC_RoundStub::Generate(MacroAssembler* masm) {
+  Register function = rdi;
+  Register vector = rbx;
+  Register slot = rdx;
+
+  Register temp = rax;
+  XMMRegister xmm_temp1 = xmm1;
+  XMMRegister xmm_temp2 = xmm0;
+  Label tail, miss;
+
+  __ SmiToInteger64(slot, slot);
+
+  // Ensure nobody has snuck in another function.
+  __ BranchIfNotBuiltin(function, temp, kMathRound, &miss);
+
+  if (arg_count() > 0) {
+    __ movp(temp, Operand(rsp, arg_count() * kPointerSize));
+    Handle<Map> map = isolate()->factory()->heap_number_map();
+    __ CheckMap(temp, map, &tail, DO_SMI_CHECK);
+
+    __ movsd(xmm_temp1, FieldOperand(temp, HeapNumber::kValueOffset));
+
+    // If the number is >0, it doesn't round to -0
+    __ xorps(xmm_temp2, xmm_temp2);
+    __ ucomisd(xmm_temp1, xmm_temp2);
+    __ j(above, &tail, Label::kNear);
+
+    // If the number is <-.5, it doesn't round to -0
+    static int64_t minus_one_half = V8_INT64_C(0xBFE0000000000000);  // -0.5
+    __ movq(temp, minus_one_half);
+    __ movq(xmm_temp2, temp);
+    __ ucomisd(xmm_temp1, xmm_temp2);
+    __ j(below, &tail, Label::kNear);
+
+    // +0 doesn't round to -0
+    __ movmskpd(temp, xmm_temp1);
+    __ testl(temp, Immediate(1));
+    __ j(zero, &tail, Label::kNear);
+
+    __ Move(FieldOperand(vector, slot, times_pointer_size,
+                         FixedArray::kHeaderSize + kPointerSize),
+            Smi::FromInt(kHasReturnedMinusZeroSentinel));
+  }
+
+  __ bind(&tail);
+  CallFunctionNoFeedback(masm, arg_count(), true, CallAsMethod());
+
+  // Unreachable.
+  __ int3();
+
+  __ bind(&miss);
+  GenerateMiss(masm);
+  __ jmp(&tail);
+}
+
+
+void CallIC_FloorStub::Generate(MacroAssembler* masm) {
+  Register function = rdi;
+  Register vector = rbx;
+  Register slot = rdx;
+
+  Register temp1 = rax;
+  Register temp2 = rsi;
+  Label tail, miss;
+
+  __ SmiToInteger64(slot, slot);
+
+  // Ensure nobody has snuck in another function.
+  __ BranchIfNotBuiltin(function, temp1, kMathFloor, &miss);
+
+  if (arg_count() > 0) {
+    __ movp(temp1, Operand(rsp, arg_count() * kPointerSize));
+    Handle<Map> map = isolate()->factory()->heap_number_map();
+    __ CheckMap(temp1, map, &tail, DO_SMI_CHECK);
+
+    // Only -0 floors to -0.
+    __ movq(temp1, FieldOperand(temp1, HeapNumber::kValueOffset));
+    static int64_t minus_zero = V8_INT64_C(0x8000000000000000);  // -0.0
+    __ movq(temp2, minus_zero);
+    __ cmpq(temp1, temp2);
+    __ j(not_equal, &tail);
+
+    __ Move(FieldOperand(vector, slot, times_pointer_size,
+                         FixedArray::kHeaderSize + kPointerSize),
+            Smi::FromInt(kHasReturnedMinusZeroSentinel));
+  }
+
+  __ bind(&tail);
+  CallFunctionNoFeedback(masm, arg_count(), true, CallAsMethod());
+
+  // Unreachable.
+  __ int3();
+
+  __ bind(&miss);
+  GenerateMiss(masm);
+  __ jmp(&tail);
+}
+
+
+void CallIC_CeilStub::Generate(MacroAssembler* masm) {
+  Register function = rdi;
+  Register vector = rbx;
+  Register slot = rdx;
+
+  Register temp = rax;
+  XMMRegister xmm_temp1 = xmm1;
+  XMMRegister xmm_temp2 = xmm0;
+  Label tail, miss;
+
+  __ SmiToInteger64(slot, slot);
+
+  // Ensure nobody has snuck in another function.
+  __ BranchIfNotBuiltin(function, temp, kMathCeil, &miss);
+
+  if (arg_count() > 0) {
+    __ movp(temp, Operand(rsp, arg_count() * kPointerSize));
+    Handle<Map> map = isolate()->factory()->heap_number_map();
+    __ CheckMap(temp, map, &tail, DO_SMI_CHECK);
+
+    __ movsd(xmm_temp1, FieldOperand(rax, HeapNumber::kValueOffset));
+
+    // If the number is >0, it doesn't round to -0
+    __ xorps(xmm_temp2, xmm_temp2);
+    __ ucomisd(xmm_temp1, xmm_temp2);
+    __ j(greater, &tail, Label::kNear);
+
+    // If the number is <=-1, it doesn't round to -0
+    static int64_t minus_one = V8_INT64_C(0xbff0000000000000);  // -1
+    __ movq(temp, minus_one);
+    __ movq(xmm_temp2, temp);
+    __ ucomisd(xmm_temp1, xmm_temp2);
+    __ j(less_equal, &tail, Label::kNear);
+
+    // +0 doesn't round to -0.
+    __ movmskpd(temp, xmm_temp1);
+    __ testq(temp, Immediate(1));
+    __ j(zero, &tail, Label::kNear);
+
+    __ Move(FieldOperand(vector, slot, times_pointer_size,
+                         FixedArray::kHeaderSize + kPointerSize),
+            Smi::FromInt(kHasReturnedMinusZeroSentinel));
+  }
+
+  __ bind(&tail);
+  CallFunctionNoFeedback(masm, arg_count(), true, CallAsMethod());
+
+  // Unreachable.
+  __ int3();
+
+  __ bind(&miss);
+  GenerateMiss(masm);
+  __ jmp(&tail);
+}
+
+
 void CallICStub::Generate(MacroAssembler* masm) {
   // rdi - function
   // rdx - slot id
@@ -2253,6 +2408,11 @@ void CallICStub::Generate(MacroAssembler* masm) {
   __ cmpp(rdi, rcx);
   __ j(equal, &miss);
 
+  __ movp(rax, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset));
+  __ movp(rax, FieldOperand(rax, SharedFunctionInfo::kFunctionDataOffset));
+  __ Cmp(rax, Smi::FromInt(0));
+  __ j(not_equal, &miss);
+
   // Update stats.
   __ SmiAddConstant(FieldOperand(rbx, with_types_offset), Smi::FromInt(1));
 
@@ -4568,6 +4728,27 @@ void CallIC_ArrayTrampolineStub::Generate(MacroAssembler* masm) {
 }
 
 
+void CallIC_RoundTrampolineStub::Generate(MacroAssembler* masm) {
+  EmitLoadTypeFeedbackVector(masm, rbx);
+  CallIC_RoundStub stub(isolate(), state());
+  __ jmp(stub.GetCode(), RelocInfo::CODE_TARGET);
+}
+
+
+void CallIC_FloorTrampolineStub::Generate(MacroAssembler* masm) {
+  EmitLoadTypeFeedbackVector(masm, rbx);
+  CallIC_FloorStub stub(isolate(), state());
+  __ jmp(stub.GetCode(), RelocInfo::CODE_TARGET);
+}
+
+
+void CallIC_CeilTrampolineStub::Generate(MacroAssembler* masm) {
+  EmitLoadTypeFeedbackVector(masm, rbx);
+  CallIC_CeilStub stub(isolate(), state());
+  __ jmp(stub.GetCode(), RelocInfo::CODE_TARGET);
+}
+
+
 void ProfileEntryHookStub::MaybeCallEntryHook(MacroAssembler* masm) {
   if (masm->isolate()->function_entry_hook() != NULL) {
     ProfileEntryHookStub stub(masm->isolate());