AsmWriter/Bitcode: MDSubrange

[oota-llvm.git] / lib / Bitcode / Writer / BitcodeWriter.cpp

diff --git a/lib/Bitcode/Writer/BitcodeWriter.cpp b/lib/Bitcode/Writer/BitcodeWriter.cpp
index 1c2424ce11bc718211d5da80968253d8d5904546..3d1e82d8f8c96cd6ac919ee0247dc106936490c8 100644 (file)
--- a/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -809,11 +809,23 @@ static void WriteGenericDebugNode(const GenericDebugNode *N,
   Record.clear();
 }
 
   Record.clear();
 }
 

-static void WriteMDSubrange(const MDSubrange *, const ValueEnumerator &,
-                            BitstreamWriter &, SmallVectorImpl<uint64_t> &,
-                            unsigned) {
-  llvm_unreachable("write not implemented");
+static uint64_t rotateSign(int64_t I) {
+  uint64_t U = I;
+  return I < 0 ? ~(U << 1) : U << 1;
+}
+
+static void WriteMDSubrange(const MDSubrange *N, const ValueEnumerator &,
+                            BitstreamWriter &Stream,
+                            SmallVectorImpl<uint64_t> &Record,
+                            unsigned Abbrev) {
+  Record.push_back(N->isDistinct());
+  Record.push_back(N->getCount());
+  Record.push_back(rotateSign(N->getLo()));
+
+  Stream.EmitRecord(bitc::METADATA_SUBRANGE, Record, Abbrev);
+  Record.clear();

 }
 }

+

 static void WriteMDEnumerator(const MDEnumerator *, const ValueEnumerator &,
                               BitstreamWriter &, SmallVectorImpl<uint64_t> &,
                               unsigned) {
 static void WriteMDEnumerator(const MDEnumerator *, const ValueEnumerator &,
                               BitstreamWriter &, SmallVectorImpl<uint64_t> &,
                               unsigned) {