================
@@ -2407,6 +2407,53 @@ class ASTReader
bool isProcessingUpdateRecords() { return ProcessingUpdateRecords; }
};
+/// A simple helper class to unpack an integer to bits and consuming
+/// the bits in order.
+class BitsUnpacker {
+ constexpr static uint32_t BitsIndexUpbound = 32;
+
+public:
+ BitsUnpacker(uint32_t V) { updateValue(V); }
+ BitsUnpacker(const BitsUnpacker &) = delete;
+ BitsUnpacker(BitsUnpacker &&) = delete;
+ BitsUnpacker operator=(const BitsUnpacker &) = delete;
+ BitsUnpacker operator=(BitsUnpacker &&) = delete;
+ ~BitsUnpacker() {
+#ifndef NDEBUG
+ while (isValid())
+ assert(!getNextBit() && "There are bits failed to read!");
+#endif
+ }
+
+ void updateValue(uint32_t V) {
+ Value = V;
+ CurrentBitsIndex = 0;
+ }
+
+ bool getNextBit() {
+ assert(isValid());
+ return Value & (1 << CurrentBitsIndex++);
+ }
+
+ uint32_t getNextBits(uint32_t Width) {
+ assert(isValid());
+ assert(Width < BitsIndexUpbound);
+ uint32_t Ret = (Value >> CurrentBitsIndex) & ((1 << Width) - 1);
+ CurrentBitsIndex += Width;
+ return Ret;
+ }
+
+ bool isValidToGetNextNBits(uint32_t Width) const {
----------------
ChuanqiXu9 wrote:
Done
https://github.com/llvm/llvm-project/pull/69287
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