[llvm-pdbdump] Re-write the record layout code to be more resilient.

This reworks the way virtual bases are handled, and also the way
padding is detected across multiple levels of aggregates, producing
a much more accurate result.

llvm-svn: 301203

1 files changed, 48 insertions, 0 deletions

diff --git a/llvm/test/tools/llvm-pdbdump/Inputs/ComplexPaddingTest.cpp b/llvm/test/tools/llvm-pdbdump/Inputs/ComplexPaddingTest.cpp
new file mode 100644
index 00000000000..44a4e304ccb
--- /dev/null
+++ b/llvm/test/tools/llvm-pdbdump/Inputs/ComplexPaddingTest.cpp
@@ -0,0 +1,48 @@
+// Compile with "cl /c /Zi /GR- ComplexPaddingTest.cpp"
+// Link with "link ComplexPaddingTest.obj /debug /nodefaultlib /entry:main"
+
+#include <stdint.h>
+
+extern "C" using at_exit_handler = void();
+
+int atexit(at_exit_handler handler) { return 0; }
+
+struct TestVB {
+  static void operator delete(void *ptr, size_t sz) {}
+  virtual ~TestVB() {}
+  virtual void IntroFunction1() {}
+  int X;
+} A;
+
+struct TestNVB {
+  static void operator delete(void *ptr, size_t sz) {}
+  virtual ~TestNVB() {}
+  virtual void IntroFunction2() {}
+  int Y;
+} B;
+
+struct TestVBLayout
+    : public virtual TestVB,
+      public TestNVB {
+  static void operator delete(void *ptr, size_t sz) {}
+  int Z;
+} C;
+
+struct TestIVBBase : public virtual TestVB {
+  int A;
+} D;
+
+struct TestIVBDerived : public TestIVBBase {
+  int B;
+} E;
+
+struct TestIVBMergedDerived
+    : public virtual TestVB,
+      public TestIVBBase {
+  int B;
+} F;
+
+int main(int argc, char **argv) {
+
+  return 0;
+}