[clang] Add some CodeGen tests for CWG 4xx issues

clang/test/CXX/drs/dr438.cpp

@@ -0,0 +1,25 @@
+// RUN: %clang_cc1 -std=c++98 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++11 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++14 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++17 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++20 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++23 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++2c %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+
+namespace dr438 { // dr438: 2.7
+
+void f() {
+  long A[2];
+  A[0] = 0;
+  A[A[0]] = 1;
+}
+
+} // namespace dr438
+
+// CHECK-LABEL: define {{.*}} void @dr438::f()()
+// CHECK:         [[A:%.+]] = alloca [2 x i64]
+// CHECK:         {{.+}} = getelementptr inbounds [2 x i64], ptr [[A]], i64 0, i64 0
+// CHECK:         [[ARRAYIDX1:%.+]] = getelementptr inbounds [2 x i64], ptr [[A]], i64 0, i64 0
+// CHECK-NEXT:    [[TEMPIDX:%.+]] = load i64, ptr [[ARRAYIDX1]]
+// CHECK-NEXT:    [[ARRAYIDX2:%.+]] = getelementptr inbounds [2 x i64], ptr [[A]], i64 0, i64 [[TEMPIDX]]
+// CHECK-LABEL: }

clang/test/CXX/drs/dr439.cpp

@@ -0,0 +1,30 @@
+// RUN: %clang_cc1 -std=c++98 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++11 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++14 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++17 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++20 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++23 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++2c %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+
+namespace dr439 { // dr439: 2.7
+
+void f() {
+  int* p1 = new int;
+  const int* p2 = static_cast<const int*>(static_cast<void *>(p1));
+  bool b = p1 == p2; // b will have the value true.
+}
+
+} // namespace dr439
+
+// We're checking that p2 was copied from p1, and then was carried over
+// to the comparison without change.
+
+// CHECK-LABEL: define {{.*}} void @dr439::f()()
+// CHECK:         [[P1:%.+]] = alloca ptr, align 8
+// CHECK-NEXT:    [[P2:%.+]] = alloca ptr, align 8
+// CHECK:         [[TEMP0:%.+]] = load ptr, ptr [[P1]]
+// CHECK-NEXT:    store ptr [[TEMP0:%.+]], ptr [[P2]]
+// CHECK-NEXT:    [[TEMP1:%.+]] = load ptr, ptr [[P1]]
+// CHECK-NEXT:    [[TEMP2:%.+]] = load ptr, ptr [[P2]]
+// CHECK-NEXT:    {{.*}} = icmp eq ptr [[TEMP1]], [[TEMP2]]
+// CHECK-LABEL: }

clang/test/CXX/drs/dr441.cpp

@@ -0,0 +1,38 @@
+// RUN: %clang_cc1 -std=c++98 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++11 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++14 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++17 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++20 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++23 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++2c %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+
+namespace dr441 { // dr441: 2.7
+
+struct A {
+  A() {}
+};
+
+A dynamic_init;
+int i;
+int& ir = i;
+int* ip = &i;
+
+} // namespace dr441
+
+// CHECK-DAG:   @dr441::dynamic_init = global %"struct.dr441::A" zeroinitializer
+// CHECK-DAG:   @dr441::i = global i32 0
+// CHECK-DAG:   @dr441::ir = constant ptr @dr441::i
+// CHECK-DAG:   @dr441::ip = global ptr @dr441::i
+// CHECK-DAG:   @llvm.global_ctors = appending global [{{.+}}] [{ {{.+}} } { {{.+}}, ptr @_GLOBAL__sub_I_dr441.cpp, {{.+}} }]
+
+// CHECK-LABEL: define {{.*}} void @__cxx_global_var_init()
+// CHECK-NEXT:  entry:
+// CHECK-NEXT:    call void @dr441::A::A()({{.*}} @dr441::dynamic_init)
+// CHECK-NEXT:    ret void
+// CHECK-NEXT:  }
+
+// CHECK-LABEL: define {{.*}} void @_GLOBAL__sub_I_dr441.cpp()
+// CHECK-NEXT:  entry:
+// CHECK-NEXT:    call void @__cxx_global_var_init()
+// CHECK-NEXT:    ret void
+// CHECK-NEXT:  }

clang/test/CXX/drs/dr462.cpp

@@ -0,0 +1,33 @@
+// RUN: %clang_cc1 -std=c++98 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++11 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++14 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++17 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++20 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++23 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++2c %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+
+#if __cplusplus == 199711L
+#define NOTHROW throw()
+#else
+#define NOTHROW noexcept(true)
+#endif
+
+namespace dr462 { // dr462: 2.7
+
+struct A {
+  ~A() NOTHROW {}
+};
+
+extern void full_expr_fence() NOTHROW;
+
+void f() {
+  const A& r = (3, A());
+  full_expr_fence();
+}
+
+} // namespace dr462
+
+// CHECK-LABEL: define {{.*}} void @dr462::f()()
+// CHECK:         call void @dr462::full_expr_fence()()
+// CHECK:         call void @dr462::A::~A()
+// CHECK-LABEL: }

clang/test/CXX/drs/dr492.cpp

@@ -0,0 +1,37 @@
+// RUN: %clang_cc1 -std=c++98 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++11 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++14 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++17 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++20 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++23 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++2c %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+
+#if __cplusplus == 199711L
+#define NOTHROW throw()
+#else
+#define NOTHROW noexcept(true)
+#endif
+
+namespace std {
+struct type_info {
+  const char* name() const NOTHROW;
+}; 
+}
+
+namespace dr492 { // dr492: 2.7
+
+void f() {
+  typeid(int).name();
+  typeid(const int).name();
+  typeid(volatile int).name();
+  typeid(const volatile int).name();
+}
+
+} // namespace dr492
+
+// CHECK-LABEL: define {{.*}} void @dr492::f()()
+// CHECK:         {{.*}} = call {{.*}} @std::type_info::name() const({{.*}} @typeinfo for int)
+// CHECK-NEXT:    {{.*}} = call {{.*}} @std::type_info::name() const({{.*}} @typeinfo for int)
+// CHECK-NEXT:    {{.*}} = call {{.*}} @std::type_info::name() const({{.*}} @typeinfo for int)
+// CHECK-NEXT:    {{.*}} = call {{.*}} @std::type_info::name() const({{.*}} @typeinfo for int)
+// CHECK-LABEL: }

clang/test/CXX/drs/dr4xx.cpp

@@ -698,9 +698,9 @@ namespace dr437 { // dr437: sup 1308
   };
 }
 
-// dr438 FIXME write a codegen test
-// dr439 FIXME write a codegen test
-// dr441 FIXME write a codegen test
+// dr438 is in dr438.cpp
+// dr439 is in dr439.cpp
+// dr441 is in dr441.cpp
 // dr442: sup 348
 // dr443: na
 
@@ -943,7 +943,7 @@ namespace dr460 { // dr460: yes
 }
 
 // dr461: na
-// dr462 FIXME write a codegen test
+// dr462 is in dr462.cpp
 // dr463: na
 // dr464: na
 // dr465: na
@@ -1089,7 +1089,7 @@ namespace dr474 { // dr474: 3.4
   }
 }
 
-// dr475 FIXME write a codegen test
+// dr475 FIXME write a libc++abi test
 
 namespace dr477 { // dr477: 3.5
   struct A {
@@ -1437,7 +1437,7 @@ namespace dr491 { // dr491: dup 413
   // expected-error@-1 {{excess elements in array initializer}}
 }
 
-// dr492 FIXME write a codegen test
+// dr492 is in dr492.cpp
 
 namespace dr493 { // dr493: dup 976
   struct X {

clang/www/cxx_dr_status.html

@@ -2668,13 +2668,13 @@ <h2 id="cxxdr">C++ defect report implementation status</h2>
     <td><a href="https://cplusplus.github.io/CWG/issues/438.html">438</a></td>
     <td>CD2</td>
     <td>Possible flaw in wording for multiple accesses to object between sequence points</td>
-    <td class="unknown" align="center">Unknown</td>
+    <td class="full" align="center">Clang 2.7</td>
   </tr>
   <tr id="439">
     <td><a href="https://cplusplus.github.io/CWG/issues/439.html">439</a></td>
     <td>CD1</td>
     <td>Guarantees on casting pointer back to cv-qualified version of original type</td>
-    <td class="unknown" align="center">Unknown</td>
+    <td class="full" align="center">Clang 2.7</td>
   </tr>
   <tr id="440">
     <td><a href="https://cplusplus.github.io/CWG/issues/440.html">440</a></td>
@@ -2686,7 +2686,7 @@ <h2 id="cxxdr">C++ defect report implementation status</h2>
     <td><a href="https://cplusplus.github.io/CWG/issues/441.html">441</a></td>
     <td>CD1</td>
     <td>Ordering of static reference initialization</td>
-    <td class="unknown" align="center">Unknown</td>
+    <td class="full" align="center">Clang 2.7</td>
   </tr>
   <tr id="442">
     <td><a href="https://cplusplus.github.io/CWG/issues/442.html">442</a></td>
@@ -2812,7 +2812,7 @@ <h2 id="cxxdr">C++ defect report implementation status</h2>
     <td><a href="https://cplusplus.github.io/CWG/issues/462.html">462</a></td>
     <td>CD3</td>
     <td>Lifetime of temporaries bound to comma expressions</td>
-    <td class="unknown" align="center">Unknown</td>
+    <td class="full" align="center">Clang 2.7</td>
   </tr>
   <tr id="463">
     <td><a href="https://cplusplus.github.io/CWG/issues/463.html">463</a></td>
@@ -2992,7 +2992,7 @@ <h2 id="cxxdr">C++ defect report implementation status</h2>
     <td><a href="https://cplusplus.github.io/CWG/issues/492.html">492</a></td>
     <td>CD1</td>
     <td><TT>typeid</TT> constness inconsistent with example</td>
-    <td class="unknown" align="center">Unknown</td>
+    <td class="full" align="center">Clang 2.7</td>
   </tr>
   <tr id="493">
     <td><a href="https://cplusplus.github.io/CWG/issues/493.html">493</a></td>