InstrProf: Remove CoverageMapping::HasCodeBefore, it isn't used

It's not entirely clear to me what this field was meant for, but it's
always false. Remove it.

llvm-svn: 228034

2 files changed, 6 insertions, 13 deletions

diff --git a/llvm/lib/ProfileData/CoverageMappingReader.cpp b/llvm/lib/ProfileData/CoverageMappingReader.cpp
index 71ce22aec9e..423947d132f 100644
--- a/llvm/lib/ProfileData/CoverageMappingReader.cpp
+++ b/llvm/lib/ProfileData/CoverageMappingReader.cpp
@@ -173,15 +173,12 @@ std::error_code RawCoverageMappingReader::readMappingRegionsSubArray(
     }
 
     // Read the source range.
-    uint64_t LineStartDelta, CodeBeforeColumnStart, NumLines, ColumnEnd;
+    uint64_t LineStartDelta, ColumnStart, NumLines, ColumnEnd;
     if (auto Err =
             readIntMax(LineStartDelta, std::numeric_limits<unsigned>::max()))
       return Err;
-    if (auto Err = readULEB128(CodeBeforeColumnStart))
+    if (auto Err = readULEB128(ColumnStart))
       return Err;
-    bool HasCodeBefore = CodeBeforeColumnStart & 1;
-    uint64_t ColumnStart = CodeBeforeColumnStart >>
-                           CounterMappingRegion::EncodingHasCodeBeforeBits;
     if (ColumnStart > std::numeric_limits<unsigned>::max())
       return error(instrprof_error::malformed);
     if (auto Err = readIntMax(NumLines, std::numeric_limits<unsigned>::max()))
@@ -213,9 +210,9 @@ std::error_code RawCoverageMappingReader::readMappingRegionsSubArray(
       dbgs() << "\n";
     });
 
-    MappingRegions.push_back(CounterMappingRegion(
-        C, InferredFileID, LineStart, ColumnStart, LineStart + NumLines,
-        ColumnEnd, HasCodeBefore, Kind));
+    MappingRegions.push_back(
+        CounterMappingRegion(C, InferredFileID, LineStart, ColumnStart,
+                             LineStart + NumLines, ColumnEnd, Kind));
     MappingRegions.back().ExpandedFileID = ExpandedFileID;
   }
   return success();
diff --git a/llvm/lib/ProfileData/CoverageMappingWriter.cpp b/llvm/lib/ProfileData/CoverageMappingWriter.cpp
index 6969c2a1242..aef5511fc0e 100644
--- a/llvm/lib/ProfileData/CoverageMappingWriter.cpp
+++ b/llvm/lib/ProfileData/CoverageMappingWriter.cpp
@@ -172,11 +172,7 @@ void CoverageMappingWriter::write(raw_ostream &OS) {
     }
     assert(I->LineStart >= PrevLineStart);
     encodeULEB128(I->LineStart - PrevLineStart, OS);
-    uint64_t CodeBeforeColumnStart =
-        uint64_t(I->HasCodeBefore) |
-        (uint64_t(I->ColumnStart)
-         << CounterMappingRegion::EncodingHasCodeBeforeBits);
-    encodeULEB128(CodeBeforeColumnStart, OS);
+    encodeULEB128(I->ColumnStart, OS);
     assert(I->LineEnd >= I->LineStart);
     encodeULEB128(I->LineEnd - I->LineStart, OS);
     encodeULEB128(I->ColumnEnd, OS);