1 files changed, 130 insertions, 3 deletions

diff --git a/test/CodeGenCXX/static-local-in-local-class.cpp b/test/CodeGenCXX/static-local-in-local-class.cpp
index ebf560ab9805..729b9376ae48 100644
--- a/test/CodeGenCXX/static-local-in-local-class.cpp
+++ b/test/CodeGenCXX/static-local-in-local-class.cpp
@@ -1,6 +1,13 @@
-// RUN: %clang_cc1 -emit-llvm -o %t %s
-// PR6769
+// RUN: %clang_cc1 -triple x86_64-linux -fblocks -emit-llvm -o - %s -std=c++1y | FileCheck %s
 
+// CHECK: @"_ZZNK3$_2clEvE1x" = internal global i32 42
+// CHECK: @_ZZ18static_local_labelPvE1q = linkonce_odr global i8* blockaddress(@_Z18static_local_labelPv, %{{.*}})
+// CHECK: @_ZZZL20block_deduced_returnvEUb_E1n = internal global i32 42
+// CHECK: @_ZZL14deduced_returnvE1n = internal global i32 42
+// CHECK: @"_ZZZNK17pr18020_constexpr3$_1clEvENKUlvE_clEvE2l2" =
+// CHECK: internal global i32* @"_ZZNK17pr18020_constexpr3$_1clEvE2l1"
+
+namespace pr6769 {
 struct X {
   static void f();
 };
@@ -19,8 +26,9 @@ void X::f() {
   }
   (void)i;
 }
+}
 
-// pr7101
+namespace pr7101 {
 void foo() {
     static int n = 0;
     struct Helper {
@@ -30,4 +38,123 @@ void foo() {
     };
     Helper::Execute();
 }
+}
+
+// These tests all break the assumption that the static var decl has to be
+// emitted before use of the var decl.  This happens because we defer emission
+// of variables with internal linkage and no initialization side effects, such
+// as 'x'.  Then we hit operator()() in 'f', and emit the callee before we emit
+// the arguments, so we emit the innermost function first.
+
+namespace pr18020_lambda {
+// Referring to l1 before emitting it used to crash.
+auto x = []() {
+  static int l1 = 0;
+  return [] { return l1; };
+};
+int f() { return x()(); }
+}
+
+// CHECK-LABEL: define internal i32 @"_ZZNK14pr18020_lambda3$_0clEvENKUlvE_clEv"
+// CHECK: load i32* @"_ZZNK14pr18020_lambda3$_0clEvE2l1"
+
+namespace pr18020_constexpr {
+// Taking the address of l1 in a constant expression used to crash.
+auto x = []() {
+  static int l1 = 0;
+  return [] {
+    static int *l2 = &l1;
+    return *l2;
+  };
+};
+int f() { return x()(); }
+}
+
+// CHECK-LABEL: define internal i32 @"_ZZNK17pr18020_constexpr3$_1clEvENKUlvE_clEv"
+// CHECK: load i32** @"_ZZZNK17pr18020_constexpr3$_1clEvENKUlvE_clEvE2l2"
+
+// Lambda-less reduction that references l1 before emitting it.  This didn't
+// crash if you put it in a namespace.
+struct pr18020_class {
+  auto operator()() {
+    static int l1 = 0;
+    struct U {
+      int operator()() { return l1; }
+    };
+    return U();
+  }
+};
+static pr18020_class x;
+int pr18020_f() { return x()(); }
+
+// CHECK-LABEL: define linkonce_odr i32 @_ZZN13pr18020_classclEvEN1UclEv
+// CHECK: load i32* @_ZZN13pr18020_classclEvE2l1
+
+// In this test case, the function containing the static local will not be
+// emitted because it is unneeded. However, the operator call of the inner class
+// is called, and the static local is referenced and must be emitted.
+static auto deduced_return() {
+  static int n = 42;
+  struct S { int *operator()() { return &n; } };
+  return S();
+}
+extern "C" int call_deduced_return_operator() {
+  return *decltype(deduced_return())()();
+}
+
+// CHECK-LABEL: define i32 @call_deduced_return_operator()
+// CHECK: call i32* @_ZZL14deduced_returnvEN1SclEv(
+// CHECK: load i32* %
+// CHECK: ret i32 %
+
+// CHECK-LABEL: define internal i32* @_ZZL14deduced_returnvEN1SclEv(%struct.S* %this)
+// CHECK: ret i32* @_ZZL14deduced_returnvE1n
+
+static auto block_deduced_return() {
+  auto (^b)() = ^() {
+    static int n = 42;
+    struct S { int *operator()() { return &n; } };
+    return S();
+  };
+  return b();
+}
+extern "C" int call_block_deduced_return() {
+  return *decltype(block_deduced_return())()();
+}
+
+// CHECK-LABEL: define i32 @call_block_deduced_return()
+// CHECK: call i32* @_ZZZL20block_deduced_returnvEUb_EN1SclEv(
+// CHECK: load i32* %
+// CHECK: ret i32 %
+
+// CHECK-LABEL: define internal i32* @_ZZZL20block_deduced_returnvEUb_EN1SclEv(%struct.S.6* %this) #0 align 2 {
+// CHECK: ret i32* @_ZZZL20block_deduced_returnvEUb_E1n
+
+inline auto static_local_label(void *p) {
+  if (p)
+    goto *p;
+  static void *q = &&label;
+  struct S { static void *get() { return q; } };
+  return S();
+label:
+  __builtin_abort();
+}
+void *global_label = decltype(static_local_label(0))::get();
+
+// CHECK-LABEL: define linkonce_odr i8* @_ZZ18static_local_labelPvEN1S3getEv()
+// CHECK: %[[lbl:[^ ]*]] = load i8** @_ZZ18static_local_labelPvE1q
+// CHECK: ret i8* %[[lbl]]
+
+auto global_lambda = []() {
+  static int x = 42;
+  struct S { static int *get() { return &x; } };
+  return S();
+};
+extern "C" int use_global_lambda() {
+  return *decltype(global_lambda())::get();
+}
+// CHECK-LABEL: define i32 @use_global_lambda()
+// CHECK: call i32* @"_ZZNK3$_2clEvEN1S3getEv"()
 
+// CHECK-LABEL: define internal i32* @"_ZZNK3$_2clEvEN1S3getEv"()
+// CHECK: ret i32* @"_ZZNK3$_2clEvE1x"