Revert "[llvm-cov] Export decision coverage to output json" (llvm#144783)

Reverts llvm#144335

Need to resolve test failures

Author: evodius96

llvm/include/llvm/ProfileData/Coverage/CoverageMapping.h

@@ -31,7 +31,6 @@
 #include "llvm/Support/Endian.h"
 #include "llvm/Support/Error.h"
 #include "llvm/Support/raw_ostream.h"
-#include <algorithm>
 #include <cassert>
 #include <cstdint>
 #include <iterator>
@@ -495,17 +494,6 @@ struct MCDCRecord {
     return TV[TestVectorIndex].first[PosToID[Condition]];
   }
 
-  /// Return the number of True and False decisions for all executed test
-  /// vectors.
-  std::pair<unsigned, unsigned> getDecisions() const {
-    const unsigned TrueDecisions =
-        std::count_if(TV.begin(), TV.end(), [](const auto &TestVec) {
-          return TestVec.second == CondState::MCDC_True;
-        });
-
-    return {TrueDecisions, TV.size() - TrueDecisions};
-  }
-
   /// Return the Result evaluation for an executed test vector.
   /// See MCDCRecordProcessor::RecordTestVector().
   CondState getTVResult(unsigned TestVectorIndex) {

llvm/tools/llvm-cov/CoverageExporterJson.cpp

@@ -62,7 +62,7 @@
 #include <utility>
 
 /// The semantic version combined as a string.
-#define LLVM_COVERAGE_EXPORT_JSON_STR "3.0.0"
+#define LLVM_COVERAGE_EXPORT_JSON_STR "2.0.1"
 
 /// Unique type identifier for JSON coverage export.
 #define LLVM_COVERAGE_EXPORT_JSON_TYPE_STR "llvm.coverage.json.export"
@@ -110,10 +110,8 @@ json::Array gatherConditions(const coverage::MCDCRecord &Record) {
 
 json::Array renderMCDCRecord(const coverage::MCDCRecord &Record) {
   const llvm::coverage::CounterMappingRegion &CMR = Record.getDecisionRegion();
-  const auto [TrueDecisions, FalseDecisions] = Record.getDecisions();
   return json::Array({CMR.LineStart, CMR.ColumnStart, CMR.LineEnd,
-                      CMR.ColumnEnd, TrueDecisions, FalseDecisions,
-                      CMR.ExpandedFileID, int64_t(CMR.Kind),
+                      CMR.ColumnEnd, CMR.ExpandedFileID, int64_t(CMR.Kind),
                       gatherConditions(Record)});
 }