llvm-cov: Removed output to STDOUT/specified file.

Instead of asking the user to specify a single file to output coverage
info and defaulting to STDOUT, llvm-cov now creates files for each
source file with a naming system of: <source filename> + ".llcov".

This is what gcov does and although it can clutter the working directory
with numerous coverage files, it will be easier to hook the llvm-cov
output to tools which operate on this assumption (such as lcov).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196184 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Support/GCOV.h

@@ -279,7 +279,7 @@ class FileInfo {
   }
   void setRunCount(uint32_t Runs) { RunCount = Runs; }
   void setProgramCount(uint32_t Programs) { ProgramCount = Programs; }
-  void print(raw_fd_ostream &OS, StringRef gcnoFile, StringRef gcdaFile) const;
+  void print(StringRef gcnoFile, StringRef gcdaFile) const;
 private:
   StringMap<LineData> LineInfo;
   uint32_t RunCount;

lib/IR/GCOV.cpp

@@ -317,8 +317,7 @@ void GCOVBlock::dump() const {
 // FileInfo implementation.
 
 /// print -  Print source files with collected line count information.
-void FileInfo::print(raw_fd_ostream &OS, StringRef gcnoFile,
-                     StringRef gcdaFile) const {
+void FileInfo::print(StringRef gcnoFile, StringRef gcdaFile) const {
   for (StringMap<LineData>::const_iterator I = LineInfo.begin(),
          E = LineInfo.end(); I != E; ++I) {
     StringRef Filename = I->first();
@@ -329,6 +328,12 @@ void FileInfo::print(raw_fd_ostream &OS, StringRef gcnoFile,
     }
     StringRef AllLines = Buff->getBuffer();
 
+    std::string CovFilename = Filename.str() + ".llcov";
+    std::string ErrorInfo;
+    raw_fd_ostream OS(CovFilename.c_str(), ErrorInfo);
+    if (!ErrorInfo.empty())
+      errs() << ErrorInfo << "\n";
+
     OS << "        -:    0:Source:" << Filename << "\n";
     OS << "        -:    0:Graph:" << gcnoFile << "\n";
     OS << "        -:    0:Data:" << gcdaFile << "\n";

test/tools/llvm-cov/llvm-cov.test

@@ -2,8 +2,9 @@ RUN: cd %p/Inputs
 # "cd" is unsupported in lit internal runner.
 REQUIRES: shell
 
-RUN: llvm-cov -gcno=test.gcno -gcda=test.gcda \
-RUN:   | diff -aub test.cpp.gcov -
+RUN: llvm-cov -gcno=test.gcno -gcda=test.gcda
+RUN: diff test.cpp.gcov test.cpp.llcov
+RUN: rm test.cpp.llcov
 
 RUN: not llvm-cov -gcno=test_read_fail.gcno -gcda=test.gcda
 

tools/llvm-cov/llvm-cov.cpp

@@ -17,7 +17,6 @@
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/MemoryObject.h"
 #include "llvm/Support/PrettyStackTrace.h"
-#include "llvm/Support/raw_ostream.h"
 #include "llvm/Support/Signals.h"
 #include "llvm/Support/system_error.h"
 using namespace llvm;
@@ -31,10 +30,6 @@ InputGCNO("gcno", cl::desc("<input gcno file>"), cl::init(""));
 static cl::opt<std::string>
 InputGCDA("gcda", cl::desc("<input gcda file>"), cl::init(""));
 
-static cl::opt<std::string>
-OutputFile("o", cl::desc("<output llvm-cov file>"), cl::init("-"));
-
-
 //===----------------------------------------------------------------------===//
 int main(int argc, char **argv) {
   // Print a stack trace if we signal out.
@@ -44,11 +39,6 @@ int main(int argc, char **argv) {
 
   cl::ParseCommandLineOptions(argc, argv, "llvm coverage tool\n");
 
-  std::string ErrorInfo;
-  raw_fd_ostream OS(OutputFile.c_str(), ErrorInfo);
-  if (!ErrorInfo.empty())
-    errs() << ErrorInfo << "\n";
-
   GCOVFile GF;
   if (InputGCNO.empty())
     errs() << " " << argv[0] << ": No gcov input file!\n";
@@ -83,6 +73,6 @@ int main(int argc, char **argv) {
 
   FileInfo FI;
   GF.collectLineCounts(FI);
-  FI.print(OS, InputGCNO, InputGCDA);
+  FI.print(InputGCNO, InputGCDA);
   return 0;
 }