[llvm] [ADT] Add fshl/fshr operations to APSInt (PR #153790)

[Chaitanya Koparkar via llvm-commits]

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@@ -41,3 +41,25 @@ void APSInt::Profile(FoldingSetNodeID& ID) const {
   ID.AddInteger((unsigned) (IsUnsigned ? 1 : 0));
   APInt::Profile(ID);
 }
+
+APSInt llvm::APSIntOps::fshl(const APSInt &Hi, const APSInt &Lo,
+                             const APSInt &Shift) {
+  bool IsUnsigned = Hi.isUnsigned();
+  APSInt BitWidth(
+    APInt(Hi.getBitWidth(), static_cast<uint64_t>(Hi.getBitWidth())),
+    IsUnsigned);
+  return APSInt((Hi << (Shift % BitWidth)) |
+                    (Lo >> (BitWidth - (Shift % BitWidth))),
+                IsUnsigned);
+}
+
+APSInt llvm::APSIntOps::fshr(const APSInt &Hi, const APSInt &Lo,
+                             const APSInt &Shift) {
+  bool IsUnsigned = Hi.isUnsigned();
+  APSInt BitWidth(
+    APInt(Hi.getBitWidth(), static_cast<uint64_t>(Hi.getBitWidth())),
+    IsUnsigned);
+  return APSInt((Hi << (BitWidth - (Shift % BitWidth))) |
+                    (Lo >> (Shift % BitWidth)),
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ckoparkar wrote:

Fixed.


https://github.com/llvm/llvm-project/pull/153790