X87: [turbofan] Support unboxed float and double stack parameters and add tests.

src/compiler/x87/code-generator-x87.cc

Index: src/compiler/x87/code-generator-x87.cc
diff --git a/src/compiler/x87/code-generator-x87.cc b/src/compiler/x87/code-generator-x87.cc
index c3e999bcbffc40b1fb12c5c10f4ba20e4498e7b5..391cdcadafdbc01f5923fb84fa21fab0503a70ed 100644
--- a/src/compiler/x87/code-generator-x87.cc
+++ b/src/compiler/x87/code-generator-x87.cc
@@ -1104,7 +1104,29 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       break;
     }
     case kX87Push:
-      if (HasImmediateInput(instr, 0)) {
+      if (instr->InputAt(0)->IsDoubleRegister()) {
+        auto allocated = AllocatedOperand::cast(*instr->InputAt(0));
+        if (allocated.machine_type() == kRepFloat32) {
+          __ sub(esp, Immediate(kDoubleSize));
+          __ fst_s(Operand(esp, 0));
+        } else {
+          DCHECK(allocated.machine_type() == kRepFloat64);
+          __ sub(esp, Immediate(kDoubleSize));
+          __ fst_d(Operand(esp, 0));
+        }
+      } else if (instr->InputAt(0)->IsDoubleStackSlot()) {
+        auto allocated = AllocatedOperand::cast(*instr->InputAt(0));
+        if (allocated.machine_type() == kRepFloat32) {
+          __ sub(esp, Immediate(kDoubleSize));
+          __ fld_s(i.InputOperand(0));
+          __ fstp_s(MemOperand(esp, 0));
+        } else {
+          DCHECK(allocated.machine_type() == kRepFloat64);
+          __ sub(esp, Immediate(kDoubleSize));
+          __ fld_d(i.InputOperand(0));
+          __ fstp_d(MemOperand(esp, 0));
+        }
+      } else if (HasImmediateInput(instr, 0)) {
         __ push(i.InputImmediate(0));
       } else {
         __ push(i.InputOperand(0));