1 files changed, 86 insertions, 0 deletions
diff --git a/test/Analysis/vla.c b/test/Analysis/vla.c
new file mode 100644
index 000000000000..f94bea96e8f6
--- /dev/null
+++ b/test/Analysis/vla.c
@@ -0,0 +1,86 @@
+// RUN: %clang_cc1 -analyze -analyzer-checker=core -verify %s
+
+// Zero-sized VLAs.
+void check_zero_sized_VLA(int x) {
+  if (x)
+    return;
+
+  int vla[x]; // expected-warning{{Declared variable-length array (VLA) has zero size}}
+}
+
+void check_uninit_sized_VLA() {
+  int x;
+  int vla[x]; // expected-warning{{Declared variable-length array (VLA) uses a garbage value as its size}}
+}
+
+// Negative VLAs.
+static void vla_allocate_signed(int x) {
+  int vla[x]; // expected-warning{{Declared variable-length array (VLA) has negative size}}
+}
+
+static void vla_allocate_unsigned(unsigned int x) {
+  int vla[x]; // no-warning
+}
+
+void check_negative_sized_VLA_1() {
+  vla_allocate_signed(-1);
+}
+
+void check_negative_sized_VLA_2() {
+  vla_allocate_unsigned(-1);
+}
+
+void check_negative_sized_VLA_3() {
+  int x = -1;
+  int vla[x]; // expected-warning{{Declared variable-length array (VLA) has negative size}}
+}
+
+void check_negative_sized_VLA_4() {
+  unsigned int x = -1;
+  int vla[x]; // no-warning
+}
+
+void check_negative_sized_VLA_5() {
+  signed char x = -1;
+  int vla[x]; // expected-warning{{Declared variable-length array (VLA) has negative size}}
+}
+
+void check_negative_sized_VLA_6() {
+  unsigned char x = -1;
+  int vla[x]; // no-warning
+}
+
+void check_negative_sized_VLA_7() {
+  signed char x = -1;
+  int vla[x + 2]; // no-warning
+}
+
+void check_negative_sized_VLA_8() {
+  signed char x = 1;
+  int vla[x - 2]; // expected-warning{{Declared variable-length array (VLA) has negative size}}
+}
+
+void check_negative_sized_VLA_9() {
+  int x = 1;
+  int vla[x]; // no-warning
+}
+
+static void check_negative_sized_VLA_10_sub(int x)
+{
+  int vla[x]; // expected-warning{{Declared variable-length array (VLA) has negative size}}
+}
+
+void check_negative_sized_VLA_10(int x) {
+  if (x < 0)
+    check_negative_sized_VLA_10_sub(x);
+}
+
+static void check_negative_sized_VLA_11_sub(int x)
+{
+  int vla[x]; // no-warning
+}
+
+void check_negative_sized_VLA_11(int x) {
+  if (x > 0)
+    check_negative_sized_VLA_11_sub(x);
+}