[turbofan] Elide fp32 convert for const compares

src/compiler/code-generator-impl.h

Index: src/compiler/code-generator-impl.h
diff --git a/src/compiler/code-generator-impl.h b/src/compiler/code-generator-impl.h
index f0762e9bbec2e0657c6e8372e643c0eed4db47d0..83cbd22604a9fb921f6d58746f1d32128c4a0334 100644
--- a/src/compiler/code-generator-impl.h
+++ b/src/compiler/code-generator-impl.h
@@ -37,6 +37,8 @@ class InstructionOperandConverter {
 
   double InputDouble(size_t index) { return ToDouble(instr_->InputAt(index)); }
 
+  float InputFloat32(size_t index) { return ToFloat32(instr_->InputAt(index)); }
+
   int32_t InputInt32(size_t index) {
     return ToConstant(instr_->InputAt(index)).ToInt32();
   }
@@ -112,6 +114,8 @@ class InstructionOperandConverter {
 
   double ToDouble(InstructionOperand* op) { return ToConstant(op).ToFloat64(); }
 
+  float ToFloat32(InstructionOperand* op) { return ToConstant(op).ToFloat32(); }
+
   ExternalReference ToExternalReference(InstructionOperand* op) {
     return ToConstant(op).ToExternalReference();
   }