Add the optimization in a few other methods

Author: antoyo

src/builder.rs

@@ -902,22 +902,22 @@ impl<'a, 'gcc, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'gcc, 'tcx> {
 
     fn fadd_algebraic(&mut self, lhs: RValue<'gcc>, rhs: RValue<'gcc>) -> RValue<'gcc> {
         // NOTE: it seems like we cannot enable fast-mode for a single operation in GCC.
-        lhs + rhs
+        self.assign_to_var(lhs + rhs)
     }
 
     fn fsub_algebraic(&mut self, lhs: RValue<'gcc>, rhs: RValue<'gcc>) -> RValue<'gcc> {
         // NOTE: it seems like we cannot enable fast-mode for a single operation in GCC.
-        lhs - rhs
+        self.assign_to_var(lhs - rhs)
     }
 
     fn fmul_algebraic(&mut self, lhs: RValue<'gcc>, rhs: RValue<'gcc>) -> RValue<'gcc> {
         // NOTE: it seems like we cannot enable fast-mode for a single operation in GCC.
-        lhs * rhs
+        self.assign_to_var(lhs * rhs)
     }
 
     fn fdiv_algebraic(&mut self, lhs: RValue<'gcc>, rhs: RValue<'gcc>) -> RValue<'gcc> {
         // NOTE: it seems like we cannot enable fast-mode for a single operation in GCC.
-        lhs / rhs
+        self.assign_to_var(lhs / rhs)
     }
 
     fn frem_algebraic(&mut self, lhs: RValue<'gcc>, rhs: RValue<'gcc>) -> RValue<'gcc> {