add a denser encoding for null terminated strings, add a 6-bit abbrev as

well.  This shrinks kc++ from 2724088 to 2717360 bytes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36821 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 14 insertions, 0 deletions

diff --git a/lib/Bitcode/Reader/BitcodeReader.cpp b/lib/Bitcode/Reader/BitcodeReader.cpp
index b1a001e1af..c4e221fd36 100644
--- a/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -651,9 +651,23 @@ bool BitcodeReader::ParseConstants() {
       
       unsigned Size = Record.size();
       std::vector<Constant*> Elts;
+      for (unsigned i = 0; i != Size; ++i)
+        Elts.push_back(ConstantInt::get(EltTy, Record[i]));
+      V = ConstantArray::get(ATy, Elts);
+      break;
+    }
+    case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
+      if (Record.empty())
+        return Error("Invalid CST_AGGREGATE record");
+      
+      const ArrayType *ATy = cast<ArrayType>(CurTy);
+      const Type *EltTy = ATy->getElementType();
       
+      unsigned Size = Record.size();
+      std::vector<Constant*> Elts;
       for (unsigned i = 0; i != Size; ++i)
         Elts.push_back(ConstantInt::get(EltTy, Record[i]));
+      Elts.push_back(Constant::getNullValue(EltTy));
       V = ConstantArray::get(ATy, Elts);
       break;
     }