Add support for C++0x's range-based for loops, as specified by the C++11 draft standard (N3291).

llvm-svn: 129541

1 files changed, 131 insertions, 0 deletions

diff --git a/clang/test/CodeGenCXX/for-range-temporaries.cpp b/clang/test/CodeGenCXX/for-range-temporaries.cpp
new file mode 100644
index 00000000000..285862f51f6
--- /dev/null
+++ b/clang/test/CodeGenCXX/for-range-temporaries.cpp
@@ -0,0 +1,131 @@
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -std=c++0x -emit-llvm -o - -UDESUGAR %s | FileCheck %s
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -std=c++0x -emit-llvm -o - -DDESUGAR %s | FileCheck %s
+
+struct A {
+  A();
+  A(const A &);
+  ~A();
+};
+
+struct B {
+  B();
+  B(const B &);
+  ~B();
+};
+
+struct C {
+  C(const B &);
+  C(const C &);
+  ~C();
+};
+
+struct E;
+struct D {
+  D(const C &);
+  D(const D &);
+  ~D();
+};
+E begin(D);
+E end(D);
+
+struct F;
+struct G;
+struct H;
+struct E {
+  E(const E &);
+  ~E();
+  F operator*();
+  G operator++();
+  H operator!=(const E &o);
+};
+
+struct I;
+struct F {
+  F(const F &);
+  ~F();
+  operator I();
+};
+
+struct G {
+  G(const G &);
+  ~G();
+  operator bool();
+};
+
+struct H {
+  H(const H &);
+  ~H();
+  operator bool();
+};
+
+struct I {
+  I(const I &);
+  ~I();
+};
+
+void body(const I &);
+
+void for_temps() {
+  A a;
+#ifdef DESUGAR
+  {
+    auto && __range = D(B());
+    for (auto __begin = begin(__range), __end = end(__range);
+         __begin != __end; ++__begin) {
+      I i = *__begin;
+      body(i);
+    }
+  }
+#else
+  for (I i : D(B())) {
+    body(i);
+  }
+#endif
+}
+
+// CHECK: define void @_Z9for_tempsv()
+// CHECK: call void @_ZN1AC1Ev(
+// CHECK: call void @_ZN1BC1Ev(
+// CHECK: call void @_ZN1CC1ERK1B(
+// CHECK: call void @_ZN1DC1ERK1C(
+// CHECK: call void @_ZN1CD1Ev(
+// CHECK: call void @_ZN1BD1Ev(
+// CHECK: call void @_ZN1DC1ERKS_(
+// CHECK: call void @_Z5begin1D(
+// CHECK: call void @_ZN1DD1Ev(
+// CHECK: call void @_ZN1DC1ERKS_(
+// CHECK: call void @_Z3end1D(
+// CHECK: call void @_ZN1DD1Ev(
+// CHECK: br label %[[COND:.*]]
+
+// CHECK: [[COND]]:
+// CHECK: call void @_ZN1EneERKS_(
+// CHECK: %[[CMP:.*]] = call zeroext i1 @_ZN1HcvbEv(
+// CHECK: call void @_ZN1HD1Ev(
+// CHECK: br i1 %[[CMP]], label %[[BODY:.*]], label %[[CLEANUP:.*]]
+
+// CHECK: [[CLEANUP]]:
+// CHECK: call void @_ZN1ED1Ev(
+// CHECK: call void @_ZN1ED1Ev(
+// In for-range:
+// call void @_ZN1DD1Ev(
+// CHECK: br label %[[END:.*]]
+
+// CHECK: [[BODY]]:
+// CHECK: call void @_ZN1EdeEv(
+// CHECK: call void @_ZN1Fcv1IEv(
+// CHECK: call void @_ZN1FD1Ev(
+// CHECK: call void @_Z4bodyRK1I(
+// CHECK: call void @_ZN1ID1Ev(
+// CHECK: br label %[[INC:.*]]
+
+// CHECK: [[INC]]:
+// CHECK: call void @_ZN1EppEv(
+// CHECK: call void @_ZN1GD1Ev(
+// CHECK: br label %[[COND]]
+
+// CHECK: [[END]]:
+// In desugared version:
+// call void @_ZN1DD1Ev(
+// CHECK: call void @_ZN1AD1Ev(
+// CHECK: ret void