[MLIR] Add helper functions for common integer types

[frgossen]

Summary

Add helper functions for 32-bit and 64-bit integer types.

[silvas]

Thanks!

[frgossen]

Can I land this? @rriddle appears to be inactive since May 7th.

mlir/include/mlir/IR/Builders.h

public:
   FloatType getBF16Type();
   FloatType getF16Type();
   FloatType getF32Type();
   FloatType getF64Type();
 
   IndexType getIndexType();
 
   IntegerType getI1Type();
+  IntegerType getI32Type();
+  IntegerType getI64Type();
   IntegerType getIntegerType(unsigned width);
   IntegerType getIntegerType(unsigned width, bool isSigned);
   FunctionType getFunctionType(ArrayRef<Type> inputs, ArrayRef<Type> results);
   TupleType getTupleType(ArrayRef<Type> elementTypes);
   NoneType getNoneType();
 
   /// Get or construct an instance of the type 'ty' with provided arguments.
   template <typename Ty, typename... Args> Ty getType(Args... args) {

mlir/lib/IR/Builders.cpp

 FloatType Builder::getF32Type() { return FloatType::getF32(context); }
 
 FloatType Builder::getF64Type() { return FloatType::getF64(context); }
 
 IndexType Builder::getIndexType() { return IndexType::get(context); }
 
 IntegerType Builder::getI1Type() { return IntegerType::get(1, context); }
 
+IntegerType Builder::getI32Type() { return IntegerType::get(32, context); }
+
+IntegerType Builder::getI64Type() { return IntegerType::get(64, context); }
+
 IntegerType Builder::getIntegerType(unsigned width) {
   return IntegerType::get(width, context);
 }
 
 IntegerType Builder::getIntegerType(unsigned width, bool isSigned) {
   return IntegerType::get(
       width, isSigned ? IntegerType::Signed : IntegerType::Unsigned, context);
 }