add isScalar and isFixedVector

Author: tgymnich

llvm/include/llvm/CodeGenTypes/LowLevelType.h

@@ -146,6 +146,9 @@ class LLT {
   constexpr bool isScalar() const { return IsScalar; }
   constexpr bool isToken() const { return IsScalar && RawData == 0; };
   constexpr bool isVector() const { return isValid() && IsVector; }
+  constexpr bool isScalar(unsigned Size) const {
+    return isScalar() && getScalarSizeInBits() == Size;
+  }
   constexpr bool isPointer() const {
     return isValid() && IsPointer && !IsVector;
   }
@@ -176,6 +179,12 @@ class LLT {
   /// if the LLT is not a vector type.
   constexpr bool isFixedVector() const { return isVector() && !isScalable(); }
 
+  constexpr bool isFixedVector(unsigned NumElements,
+                               unsigned ScalarSize) const {
+    return isFixedVector() && getNumElements() == NumElements &&
+           getScalarSizeInBits() == ScalarSize;
+  }
+
   /// Returns true if the LLT is a scalable vector. Returns false otherwise,
   /// even if the LLT is not a vector type.
   constexpr bool isScalableVector() const { return isVector() && isScalable(); }