Check .rela instead of ELF64 for the compensation vaue resetting

[oota-llvm.git] / unittests / Support / Casting.cpp

diff --git a/unittests/Support/Casting.cpp b/unittests/Support/Casting.cpp
index 4e689ec1d2cc6fd99f40a83e3348da3d1eddfa6e..ad564aa366df15d18c979385ca2e742d600a989a 100644 (file)
--- a/unittests/Support/Casting.cpp
+++ b/unittests/Support/Casting.cpp
@@ -1,4 +1,4 @@
-//===---------- llvm/unittest/Support/Casting.cpp - Casting tests --------===//
+//===---------- llvm/unittest/Support/Casting.cpp - Casting tests ---------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -7,15 +7,13 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/Support/raw_ostream.h"
-#include "llvm/Support/Debug.h"
-//#define DEBUG_CAST_OPERATORS
 #include "llvm/Support/Casting.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/raw_ostream.h"
 
 #include "gtest/gtest.h"
 #include <cstdlib>
 
-
 namespace llvm {
 
 // set up two example classes
@@ -23,7 +21,10 @@ namespace llvm {
 //
 struct bar {
   bar() {}
-  //struct foo *baz();
+  struct foo *baz();
+  struct foo *caz();
+  struct foo *daz();
+  struct foo *naz();
 private:
   bar(const bar &);
 };
@@ -35,16 +36,28 @@ struct foo {
     }*/
 };
 
-template <> struct isa_impl<foo,bar> {
+template <> struct isa_impl<foo, bar> {
   static inline bool doit(const bar &Val) {
     dbgs() << "Classof: " << &Val << "\n";
     return true;
   }
 };
 
-/*foo *bar::baz() {
+foo *bar::baz() {
     return cast<foo>(this);
-}*/
+}
+
+foo *bar::caz() {
+    return cast_or_null<foo>(this);
+}
+
+foo *bar::daz() {
+    return dyn_cast<foo>(this);
+}
+
+foo *bar::naz() {
+    return dyn_cast_or_null<foo>(this);
+}
 
 
 bar *fub();
@@ -56,7 +69,9 @@ namespace {
 
 const foo *null_foo = NULL;
 
+bar B;
 extern bar &B1;
+bar &B1 = B;
 extern const bar *B2;
 // test various configurations of const
 const bar &B3 = B1;
@@ -80,11 +95,11 @@ TEST(CastingTest, cast) {
   EXPECT_NE(&F5, null_foo);
   const foo *F6 = cast<foo>(B4);
   EXPECT_NE(F6, null_foo);
-  foo *F7 = cast<foo>(fub());
-  EXPECT_EQ(F7, null_foo);
-
-/*  foo *F8 = B1.baz();
-  EXPECT_NE(F8, null_foo);*/
+  // Can't pass null pointer to cast<>.
+  // foo *F7 = cast<foo>(fub());
+  // EXPECT_EQ(F7, null_foo);
+  foo *F8 = B1.baz();
+  EXPECT_NE(F8, null_foo);
 }
 
 TEST(CastingTest, cast_or_null) {
@@ -96,6 +111,35 @@ TEST(CastingTest, cast_or_null) {
   EXPECT_NE(F13, null_foo);
   const foo *F14 = cast_or_null<foo>(fub());  // Shouldn't print.
   EXPECT_EQ(F14, null_foo);
+  foo *F15 = B1.caz();
+  EXPECT_NE(F15, null_foo);
+}
+
+TEST(CastingTest, dyn_cast) {
+  const foo *F1 = dyn_cast<foo>(B2);
+  EXPECT_NE(F1, null_foo);
+  const foo *F2 = dyn_cast<foo>(B2);
+  EXPECT_NE(F2, null_foo);
+  const foo *F3 = dyn_cast<foo>(B4);
+  EXPECT_NE(F3, null_foo);
+  // Can't pass null pointer to dyn_cast<>.
+  // foo *F4 = dyn_cast<foo>(fub());
+  // EXPECT_EQ(F4, null_foo);
+  foo *F5 = B1.daz();
+  EXPECT_NE(F5, null_foo);
+}
+
+TEST(CastingTest, dyn_cast_or_null) {
+  const foo *F1 = dyn_cast_or_null<foo>(B2);
+  EXPECT_NE(F1, null_foo);
+  const foo *F2 = dyn_cast_or_null<foo>(B2);
+  EXPECT_NE(F2, null_foo);
+  const foo *F3 = dyn_cast_or_null<foo>(B4);
+  EXPECT_NE(F3, null_foo);
+  foo *F4 = dyn_cast_or_null<foo>(fub());
+  EXPECT_EQ(F4, null_foo);
+  foo *F5 = B1.naz();
+  EXPECT_NE(F5, null_foo);
 }
 
 // These lines are errors...
@@ -105,10 +149,58 @@ TEST(CastingTest, cast_or_null) {
 //foo &F23 = cast_or_null<foo>(B1);
 //const foo &F24 = cast_or_null<foo>(B3);
 
-
-bar B;
-bar &B1 = B;
 const bar *B2 = &B;
 }  // anonymous namespace
 
 bar *llvm::fub() { return 0; }
+
+namespace {
+namespace inferred_upcasting {
+// This test case verifies correct behavior of inferred upcasts when the
+// types are statically known to be OK to upcast. This is the case when,
+// for example, Derived inherits from Base, and we do `isa<Base>(Derived)`.
+
+// Note: This test will actually fail to compile without inferred
+// upcasting.
+
+class Base {
+public:
+  // No classof. We are testing that the upcast is inferred.
+  Base() {}
+};
+
+class Derived : public Base {
+public:
+  Derived() {}
+};
+
+// Even with no explicit classof() in Base, we should still be able to cast
+// Derived to its base class.
+TEST(CastingTest, UpcastIsInferred) {
+  Derived D;
+  EXPECT_TRUE(isa<Base>(D));
+  Base *BP = dyn_cast<Base>(&D);
+  EXPECT_TRUE(BP != NULL);
+}
+
+
+// This test verifies that the inferred upcast takes precedence over an
+// explicitly written one. This is important because it verifies that the
+// dynamic check gets optimized away.
+class UseInferredUpcast {
+public:
+  int Dummy;
+  static bool classof(const UseInferredUpcast *) {
+    return false;
+  }
+};
+
+TEST(CastingTest, InferredUpcastTakesPrecedence) {
+  UseInferredUpcast UIU;
+  // Since the explicit classof() returns false, this will fail if the
+  // explicit one is used.
+  EXPECT_TRUE(isa<UseInferredUpcast>(&UIU));
+}
+
+} // end namespace inferred_upcasting
+} // end anonymous namespace