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-rw-r--r--clang/test/CodeGenCXX/vla.cpp56
1 files changed, 56 insertions, 0 deletions
diff --git a/clang/test/CodeGenCXX/vla.cpp b/clang/test/CodeGenCXX/vla.cpp
new file mode 100644
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+++ b/clang/test/CodeGenCXX/vla.cpp
@@ -0,0 +1,56 @@
+// RUN: %clang_cc1 -triple x86_64-apple-darwin %s -emit-llvm -o - | FileCheck %s
+
+template<typename T>
+struct S {
+ static int n;
+};
+template<typename T> int S<T>::n = 5;
+
+int f() {
+ // Make sure that the reference here is enough to trigger the instantiation of
+ // the static data member.
+ // CHECK: @_ZN1SIiE1nE = weak_odr global i32 5
+ int a[S<int>::n];
+ return sizeof a;
+}
+
+// rdar://problem/9506377
+void test0(void *array, int n) {
+ // CHECK: define void @_Z5test0Pvi(
+ // CHECK: [[ARRAY:%.*]] = alloca i8*, align 8
+ // CHECK-NEXT: [[N:%.*]] = alloca i32, align 4
+ // CHECK-NEXT: [[REF:%.*]] = alloca i16*, align 8
+ // CHECK-NEXT: [[S:%.*]] = alloca i16, align 2
+ // CHECK-NEXT: store i8*
+ // CHECK-NEXT: store i32
+
+ // Capture the bounds.
+ // CHECK-NEXT: [[T0:%.*]] = load i32* [[N]], align 4
+ // CHECK-NEXT: [[DIM0:%.*]] = zext i32 [[T0]] to i64
+ // CHECK-NEXT: [[T0:%.*]] = load i32* [[N]], align 4
+ // CHECK-NEXT: [[T1:%.*]] = add nsw i32 [[T0]], 1
+ // CHECK-NEXT: [[DIM1:%.*]] = zext i32 [[T1]] to i64
+ typedef short array_t[n][n+1];
+
+ // CHECK-NEXT: [[T0:%.*]] = load i8** [[ARRAY]], align 8
+ // CHECK-NEXT: [[T1:%.*]] = bitcast i8* [[T0]] to i16*
+ // CHECK-NEXT: store i16* [[T1]], i16** [[REF]], align 8
+ array_t &ref = *(array_t*) array;
+
+ // CHECK-NEXT: [[T0:%.*]] = load i16** [[REF]]
+ // CHECK-NEXT: [[T1:%.*]] = mul nsw i64 1, [[DIM1]]
+ // CHECK-NEXT: [[T2:%.*]] = getelementptr inbounds i16* [[T0]], i64 [[T1]]
+ // CHECK-NEXT: [[T3:%.*]] = getelementptr inbounds i16* [[T2]], i64 2
+ // CHECK-NEXT: store i16 3, i16* [[T3]]
+ ref[1][2] = 3;
+
+ // CHECK-NEXT: [[T0:%.*]] = load i16** [[REF]]
+ // CHECK-NEXT: [[T1:%.*]] = mul nsw i64 4, [[DIM1]]
+ // CHECK-NEXT: [[T2:%.*]] = getelementptr inbounds i16* [[T0]], i64 [[T1]]
+ // CHECK-NEXT: [[T3:%.*]] = getelementptr inbounds i16* [[T2]], i64 5
+ // CHECK-NEXT: [[T4:%.*]] = load i16* [[T3]]
+ // CHECK-NEXT: store i16 [[T4]], i16* [[S]], align 2
+ short s = ref[4][5];
+
+ // CHECK-NEXT: ret void
+}