[turbofan] Fix for register allocation crash

It appears we haven't wired in the 32 float constant passed on the stack.

BUG=v8:4506
LOG=n

Review URL: https://codereview.chromium.org/1407003015

Cr-Commit-Position: refs/heads/master@{#31453}

src/compiler/code-generator.cc

@@ -632,6 +632,10 @@ void CodeGenerator::AddTranslationForOperand(Translation* translation,
         constant_object =
             isolate()->factory()->NewNumberFromInt(constant.ToInt32());
         break;
+      case Constant::kFloat32:
+        DCHECK((type & (kRepFloat32 | kRepTagged)) != 0);
+        constant_object = isolate()->factory()->NewNumber(constant.ToFloat32());
+        break;
       case Constant::kFloat64:
         DCHECK((type & (kRepFloat64 | kRepTagged)) != 0);
         constant_object = isolate()->factory()->NewNumber(constant.ToFloat64());

src/compiler/instruction-selector.cc

@@ -1096,6 +1096,7 @@ InstructionOperand InstructionSelector::OperandForDeopt(
   switch (input->opcode()) {
     case IrOpcode::kInt32Constant:
     case IrOpcode::kNumberConstant:
+    case IrOpcode::kFloat32Constant:
     case IrOpcode::kFloat64Constant:
     case IrOpcode::kHeapConstant:
       return g->UseImmediate(input);