[mlir][IR] Add isInteger() (without width) (#84467)

For the singless and signed integers overloads exist, so that the width
does not need to be specified as an argument. This adds the same for
integers without checking for signedness.

Author: marbre

mlir/include/mlir/IR/Types.h

@@ -133,7 +133,8 @@ class Type {
   bool isF80() const;
   bool isF128() const;
 
-  /// Return true if this is an integer type with the specified width.
+  /// Return true if this is an integer type (with the specified width).
+  bool isInteger() const;
   bool isInteger(unsigned width) const;
   /// Return true if this is a signless integer type (with the specified width).
   bool isSignlessInteger() const;

mlir/lib/IR/Types.cpp

@@ -55,6 +55,8 @@ bool Type::isF128() const { return llvm::isa<Float128Type>(*this); }
 
 bool Type::isIndex() const { return llvm::isa<IndexType>(*this); }
 
+bool Type::isInteger() const { return llvm::isa<IntegerType>(*this); }
+
 /// Return true if this is an integer type with the specified width.
 bool Type::isInteger(unsigned width) const {
   if (auto intTy = llvm::dyn_cast<IntegerType>(*this))