llvm-cov: Implement the object-directory flag

llvm-svn: 200741
diff --git a/llvm/test/tools/llvm-cov/Inputs/test_objdir.cpp.gcov b/llvm/test/tools/llvm-cov/Inputs/test_objdir.cpp.gcov
new file mode 100644
index 0000000..abf8856
--- /dev/null
+++ b/llvm/test/tools/llvm-cov/Inputs/test_objdir.cpp.gcov
@@ -0,0 +1,79 @@
+        -:    0:Source:test.cpp
+        -:    0:Graph:objdir/test.gcno
+        -:    0:Data:objdir/test.gcda
+        -:    0:Runs:2
+        -:    0:Programs:1
+        -:    1:#include "test.h"
+        -:    2:#include <cstdlib>
+        -:    3:
+        -:    4:bool on = false;
+        -:    5:int len = 42;
+        -:    6:double grid[10][10] = {0};
+        -:    7:const char * hello = "world";
+        -:    8:const char * world = "hello";
+        -:    9:
+8589934592:   10:void A::B() {}
+        -:   11:
+    #####:   12:void useless() {}
+        -:   13:
+        -:   14:double more_useless() {
+    #####:   15:  return 0;
+        -:   16:}
+        -:   17:
+        -:   18:int foo() {
+        2:   19:  on = true;
+        2:   20:  return 3;
+        -:   21:}
+        -:   22:
+        -:   23:int bar() {
+    #####:   24:  len--;
+    #####:   25:  return foo() + 45;
+        -:   26:}
+        -:   27:
+        8:   28:void assign(int ii, int jj) {
+        8:   29:  grid[ii][jj] = (ii+1) * (jj+1);
+        8:   30:}
+        -:   31:
+        -:   32:void initialize_grid() {
+       12:   33:  for (int ii = 0; ii < 2; ii++)
+       24:   34:    for (int jj = 0; jj < 2; jj++)
+       12:   35:      assign(ii, jj);
+        2:   36:}
+        -:   37:
+        -:   38:int main() {
+        2:   39:  initialize_grid();
+        -:   40:
+        2:   41:  int a = 2;
+        2:   42:  on = rand() % 2;
+        2:   43:  if (on) {
+        2:   44:    foo();
+        2:   45:    ++a;
+        2:   46:  } else {
+    #####:   47:    bar();
+    #####:   48:    a += rand();
+        -:   49:  }
+        -:   50:
+       44:   51:  for (int ii = 0; ii < 10; ++ii) {
+       20:   52:    switch (rand() % 5) {
+        -:   53:      case 0:
+        4:   54:        a += rand();
+        4:   55:        break;
+        -:   56:      case 1:
+        -:   57:      case 2:
+        2:   58:        a += rand() / rand();
+        2:   59:        break;
+        -:   60:      case 3:
+        6:   61:        a -= rand();
+        6:   62:        break;
+        -:   63:      default:
+        8:   64:        a = -1;
+        8:   65:    }
+       20:   66:  }
+        -:   67:
+        2:   68:  A thing;
+17179869188:   69:  for (uint64_t ii = 0; ii < 4294967296; ++ii)
+8589934592:   70:    thing.B();
+        -:   71:
+        2:   72:  return a + 8 + grid[2][3] + len;
+        -:   73:  return more_useless();
+        -:   74:}