[turbofan] Float32 LinkageLocations need double registers too.

src/compiler/instruction-selector-impl.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_INSTRUCTION_SELECTOR_IMPL_H_
 #define V8_COMPILER_INSTRUCTION_SELECTOR_IMPL_H_
 
 #include "src/compiler/instruction.h"
 #include "src/compiler/instruction-selector.h"
 #include "src/compiler/linkage.h"
@@ skipping 206 matching lines @@
       // a location on the caller frame.
       return UnallocatedOperand(UnallocatedOperand::FIXED_SLOT,
                                 location.AsCallerFrameSlot(), virtual_register);
     }
     if (location.IsCalleeFrameSlot()) {
       // a spill location on this (callee) frame.
       return UnallocatedOperand(UnallocatedOperand::FIXED_SLOT,
                                 location.AsCalleeFrameSlot(), virtual_register);
     }
     // a fixed register.
-    if (RepresentationOf(type) == kRepFloat64) {
+    MachineType rep = RepresentationOf(type);
+    if (rep == kRepFloat64 || rep == kRepFloat32) {
       return UnallocatedOperand(UnallocatedOperand::FIXED_DOUBLE_REGISTER,
                                 location.AsRegister(), virtual_register);
     }
     return UnallocatedOperand(UnallocatedOperand::FIXED_REGISTER,
                               location.AsRegister(), virtual_register);
   }
 
   InstructionSelector* selector_;
 };
 
@@ skipping 137 matching lines @@
                : (frame_state_descriptor->GetTotalSize() +
                   1);  // Include deopt id.
   }
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_SELECTOR_IMPL_H_