Fix for PR21915: assert on multidimensional VLA in function arguments.

Fixed assertion on type checking for arguments and parameters on function call if arguments are pointers to VLA
Differential Revision: http://reviews.llvm.org/D6655

llvm-svn: 224504

1 files changed, 30 insertions, 0 deletions

diff --git a/clang/test/CodeGen/vlt_to_pointer.c b/clang/test/CodeGen/vlt_to_pointer.c
new file mode 100644
index 00000000000..22c620aa642
--- /dev/null
+++ b/clang/test/CodeGen/vlt_to_pointer.c
@@ -0,0 +1,30 @@
+// RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s
+
+int c[1][3*2];
+// CHECK: @{{.+}} = {{.*}} global [1 x [6 x {{i[0-9]+}}]] zeroinitializer
+
+// CHECK-LABEL: @f
+int f(int * const m, int (**v)[*m * 2])
+{
+    return &(c[0][*m]) == &((*v)[0][*m]);
+    // CHECK: icmp
+    // CHECK: ret i{{[0-9]+}}
+}
+
+// CHECK-LABEL: @test
+int test(int n, int (*(*fn)(void))[n]) {
+  return (*fn())[0];
+}
+
+// CHECK-LABEL: @main
+int main()
+{
+    int m = 3;
+    int (*d)[3*2] = c;
+    int (*fn[m])(void);
+    return f(&m, &d) + test(m, &fn);
+
+    // CHECK: call {{.+}} @f(
+    // CHECK: ret i{{[0-9]+}}
+}
+