Re-revert "Refactor debuginfo-tests"

This is still broken because it causes certain tests to be
run twice with slightly different configurations, which is
wrong in some cases.

You can observe this by running:

  ninja -nv check-all | grep debuginfo-tests

And seeing that it passes clang/test and clang/test/debuginfo-tests
to lit, which causes it to run debuginfo-tests twice.  The fix is
going to involve either:

  a) figuring out that we're running in this "deprecated" configuration,
     and then deleting the clang/test/debuginfo-tests path, which should
     cause it to behave identically to before, or:
  b) make lit smart enough that it doesn't descend into a sub-suite if
     that sub-suite already has a lit.cfg file.

1 files changed, 46 insertions, 0 deletions

diff --git a/debuginfo-tests/dbg-arg.c b/debuginfo-tests/dbg-arg.c
new file mode 100644
index 00000000000..a65dc910b8b
--- /dev/null
+++ b/debuginfo-tests/dbg-arg.c
@@ -0,0 +1,46 @@
+// This test case checks debug info during register moves for an argument.
+// RUN: %clang %target_itanium_abi_host_triple -m64 -mllvm -fast-isel=false  %s -c -o %t.o -g
+// RUN: %clang %target_itanium_abi_host_triple -m64 %t.o -o %t.out
+// RUN: %test_debuginfo %s %t.out
+//
+// DEBUGGER: break 26
+// DEBUGGER: r
+// DEBUGGER: print mutex
+// CHECK:  ={{.* 0x[0-9A-Fa-f]+}}
+//
+// Radar 8412415
+
+struct _mtx
+{
+  long unsigned int ptr;
+  int waiters;
+  struct {
+    int tag;
+    int pad;
+  } mtxi;
+};
+
+
+int foobar(struct _mtx *mutex) {
+  int r = 1;
+  int l = 0;
+  int j = 0;
+  do {
+    if (mutex->waiters) {
+      r = 2;
+    }
+    j = bar(r, l);
+    ++l;
+  } while (l < j);
+  return r + j;
+}
+
+int bar(int i, int j) {
+  return i + j;
+}
+
+int main() {
+  struct _mtx m;
+  m.waiters = 0;
+  return foobar(&m);
+}