Added basic unit test for llvm-cov.

This test compares the output of llvm-cov against a coverage file
generated by gcov. Since the source file must be in the current
directory when reading GCNO files, the test will first cd into the
Inputs directory.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194451 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 77 insertions, 0 deletions

diff --git a/test/tools/llvm-cov/Inputs/test.cpp b/test/tools/llvm-cov/Inputs/test.cpp
new file mode 100644
index 0000000000..07bc3f294c
--- /dev/null
+++ b/test/tools/llvm-cov/Inputs/test.cpp
@@ -0,0 +1,77 @@
+#include <cstdlib>
+
+bool on = false;
+int len = 42;
+double grid[10][10] = {0};
+const char * hello = "world";
+const char * world = "hello";
+
+struct A {
+  virtual void B();
+};
+
+void A::B() {}
+
+void useless() {}
+
+double more_useless() {
+  return 0;
+}
+
+int foo() {
+  on = true;
+  return 3;
+}
+
+int bar() {
+  len--;
+  return foo() + 45;
+}
+
+void assign(int ii, int jj) {
+  grid[ii][jj] = (ii+1) * (jj+1);
+}
+
+void initialize_grid() {
+  for (int ii = 0; ii < 2; ii++)
+    for (int jj = 0; jj < 2; jj++)
+      assign(ii, jj);
+}
+
+int main() {
+  initialize_grid();
+
+  int a = 2;
+  on = rand() % 2;
+  if (on) {
+    foo();
+    ++a;
+  } else {
+    bar();
+    a += rand();
+  }
+
+  for (int ii = 0; ii < 10; ++ii) {
+    switch (rand() % 5) {
+      case 0:
+        a += rand();
+        break;
+      case 1:
+      case 2:
+        a += rand() / rand();
+        break;
+      case 3:
+        a -= rand();
+        break;
+      default:
+        a = -1;
+    }
+  }
+
+  A thing;
+  for (uint64_t ii = 0; ii < 4294967296; ++ii)
+    thing.B();
+
+  return a + 8 + grid[2][3] + len;
+  return more_useless();
+}