Fix BitstreamReader's GetCurrentBitNo to return the correct bit number, and stop JumpToBit from covering up its mistakes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68648 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 2 deletions

diff --git a/include/llvm/Bitcode/BitstreamReader.h b/include/llvm/Bitcode/BitstreamReader.h
index d64c0dc2ac..d738628efb 100644
--- a/include/llvm/Bitcode/BitstreamReader.h
+++ b/include/llvm/Bitcode/BitstreamReader.h
@@ -115,7 +115,7 @@ public:
 
   /// GetCurrentBitNo - Return the bit # of the bit we are reading.
   uint64_t GetCurrentBitNo() const {
-    return (NextChar-FirstChar)*CHAR_BIT + ((32-BitsInCurWord) & 31);
+    return (NextChar-FirstChar)*CHAR_BIT - BitsInCurWord;
   }
 
   /// JumpToBit - Reset the stream to the specified bit number.
@@ -131,7 +131,6 @@ public:
 
     // Skip over any bits that are already consumed.
     if (WordBitNo) {
-      NextChar -= 4;
       Read(static_cast<unsigned>(WordBitNo));
     }
   }