Merge branch 'users/chapuni/cov/single/base' into users/chapuni/cov/single/loopusers/chapuni/cov/single/loop

Conflicts:
	clang/lib/CodeGen/CoverageMappingGen.cpp

1 files changed, 24 insertions, 40 deletions

diff --git a/llvm/lib/Transforms/Instrumentation/GCOVProfiling.cpp b/llvm/lib/Transforms/Instrumentation/GCOVProfiling.cpp
index f9be7f9..6e86ffd 100644
--- a/llvm/lib/Transforms/Instrumentation/GCOVProfiling.cpp
+++ b/llvm/lib/Transforms/Instrumentation/GCOVProfiling.cpp
@@ -61,7 +61,7 @@ enum : uint32_t {
 };
 
 static cl::opt<std::string> DefaultGCOVVersion("default-gcov-version",
-                                               cl::init("408*"), cl::Hidden,
+                                               cl::init("0000"), cl::Hidden,
                                                cl::ValueRequired);
 
 static cl::opt<bool> AtomicCounter("gcov-atomic-counter", cl::Hidden,
@@ -154,6 +154,7 @@ private:
   GCOVOptions Options;
   llvm::endianness Endian;
   raw_ostream *os;
+  int Version = 0;
 
   // Checksum, produced by hash of EdgeDestinations
   SmallVector<uint32_t, 4> FileChecksums;
@@ -334,12 +335,9 @@ namespace {
         : GCOVRecord(P), SP(SP), EndLine(EndLine), Ident(Ident),
           Version(Version), EntryBlock(P, 0), ReturnBlock(P, 1) {
       LLVM_DEBUG(dbgs() << "Function: " << getFunctionName(SP) << "\n");
-      bool ExitBlockBeforeBody = Version >= 48;
-      uint32_t i = ExitBlockBeforeBody ? 2 : 1;
+      uint32_t i = 2;
       for (BasicBlock &BB : *F)
         Blocks.insert(std::make_pair(&BB, GCOVBlock(P, i++)));
-      if (!ExitBlockBeforeBody)
-        ReturnBlock.Number = i;
 
       std::string FunctionNameAndLine;
       raw_string_ostream FNLOS(FunctionNameAndLine);
@@ -363,44 +361,28 @@ namespace {
     void writeOut(uint32_t CfgChecksum) {
       write(GCOV_TAG_FUNCTION);
       SmallString<128> Filename = getFilename(SP);
-      uint32_t BlockLen =
-          2 + (Version >= 47) + wordsOfString(getFunctionName(SP));
-      if (Version < 80)
-        BlockLen += wordsOfString(Filename) + 1;
-      else
-        BlockLen += 1 + wordsOfString(Filename) + 3 + (Version >= 90);
+      uint32_t BlockLen = 3 + wordsOfString(getFunctionName(SP));
+      BlockLen += 1 + wordsOfString(Filename) + 4;
 
       write(BlockLen);
       write(Ident);
       write(FuncChecksum);
-      if (Version >= 47)
-        write(CfgChecksum);
+      write(CfgChecksum);
       writeString(getFunctionName(SP));
-      if (Version < 80) {
-        writeString(Filename);
-        write(SP->getLine());
-      } else {
-        write(SP->isArtificial()); // artificial
-        writeString(Filename);
-        write(SP->getLine()); // start_line
-        write(0);             // start_column
-        // EndLine is the last line with !dbg. It is not the } line as in GCC,
-        // but good enough.
-        write(EndLine);
-        if (Version >= 90)
-          write(0); // end_column
-      }
+
+      write(SP->isArtificial()); // artificial
+      writeString(Filename);
+      write(SP->getLine()); // start_line
+      write(0);             // start_column
+      // EndLine is the last line with !dbg. It is not the } line as in GCC,
+      // but good enough.
+      write(EndLine);
+      write(0); // end_column
 
       // Emit count of blocks.
       write(GCOV_TAG_BLOCKS);
-      if (Version < 80) {
-        write(Blocks.size() + 2);
-        for (int i = Blocks.size() + 2; i; --i)
-          write(0);
-      } else {
-        write(1);
-        write(Blocks.size() + 2);
-      }
+      write(1);
+      write(Blocks.size() + 2);
       LLVM_DEBUG(dbgs() << (Blocks.size() + 1) << " blocks\n");
 
       // Emit edges between blocks.
@@ -767,7 +749,6 @@ bool GCOVProfiler::emitProfileNotes(
     function_ref<BlockFrequencyInfo *(Function &F)> GetBFI,
     function_ref<BranchProbabilityInfo *(Function &F)> GetBPI,
     function_ref<const TargetLibraryInfo &(Function &F)> GetTLI) {
-  int Version;
   {
     uint8_t c3 = Options.Version[0];
     uint8_t c2 = Options.Version[1];
@@ -775,6 +756,11 @@ bool GCOVProfiler::emitProfileNotes(
     Version = c3 >= 'A' ? (c3 - 'A') * 100 + (c2 - '0') * 10 + c1 - '0'
                         : (c3 - '0') * 10 + c1 - '0';
   }
+  // Emit .gcno files that are compatible with GCC 11.1.
+  if (Version < 111) {
+    Version = 111;
+    memcpy(Options.Version, "B11*", 4);
+  }
 
   bool EmitGCDA = Options.EmitData;
   for (unsigned i = 0, e = CUNode->getNumOperands(); i != e; ++i) {
@@ -973,10 +959,8 @@ bool GCOVProfiler::emitProfileNotes(
         out.write(Tmp, 4);
       }
       write(Stamp);
-      if (Version >= 90)
-        writeString(""); // unuseful current_working_directory
-      if (Version >= 80)
-        write(0); // unuseful has_unexecuted_blocks
+      writeString("."); // unuseful current_working_directory
+      write(0);         // unuseful has_unexecuted_blocks
 
       for (auto &Func : Funcs)
         Func->writeOut(Stamp);