diff --git a/clang/test/Parser/lax-conv.cpp b/clang/test/Parser/lax-conv.cpp
--- a/clang/test/Parser/lax-conv.cpp
+++ b/clang/test/Parser/lax-conv.cpp
@@ -2,6 +2,20 @@
 // RUN: %clang_cc1 -triple=powerpc64le-unknown-linux-gnu -target-feature +altivec -target-feature +vsx -target-cpu pwr8 -fsyntax-only -verify=expected,novsx %s
 // RUN: %clang_cc1 -triple=powerpc64-ibm-aix -target-feature +altivec -target-feature +vsx -target-cpu pwr8 -fsyntax-only -verify=expected,aix %s
 
+vector bool short vbs;
+vector signed short vss;
+vector unsigned short vus;
+vector bool int vbi;
+vector signed int vsi;
+vector unsigned int vui;
+vector bool long long vbl;
+vector signed long long vsl;
+vector unsigned long long vul;
+vector bool char vbc;
+vector signed char vsc;
+vector unsigned char vuc;
+vector pixel vp;
+
 void dummy(vector unsigned int a);
 template <typename VEC> VEC __attribute__((noinline)) test(vector unsigned char a, vector unsigned char b) {
     return (VEC)(a * b);
@@ -65,3 +79,34 @@
   return dummy((vector unsigned int)(ArgExplicitConvAddSame1Full +
                                      ArgExplicitConvAddSame2Full));
 }
+void test_bool_compat(void) {
+  vbs = vss; // expected-warning {{Implicit conversion between vector types (''__vector short' (vector of 8 'short' values)' and ''__vector __bool unsigned short' (vector of 8 'unsigned short' values)') is deprecated. In the future, the behavior implied by '-fno-lax-vector-conversions' will be the default.}}
+  vbs = vus; // expected-warning {{Implicit conversion between vector types (''__vector unsigned short' (vector of 8 'unsigned short' values)' and ''__vector __bool unsigned short' (vector of 8 'unsigned short' values)') is deprecated. In the future, the behavior implied by '-fno-lax-vector-conversions' will be the default.}}
+
+  vbi = vsi; // expected-warning {{Implicit conversion between vector types (''__vector int' (vector of 4 'int' values)' and ''__vector __bool unsigned int' (vector of 4 'unsigned int' values)') is deprecated. In the future, the behavior implied by '-fno-lax-vector-conversions' will be the default.}}
+  vbi = vui; // expected-warning {{Implicit conversion between vector types (''__vector unsigned int' (vector of 4 'unsigned int' values)' and ''__vector __bool unsigned int' (vector of 4 'unsigned int' values)') is deprecated. In the future, the behavior implied by '-fno-lax-vector-conversions' will be the default.}}
+
+  vbl = vsl; // expected-warning {{Implicit conversion between vector types (''__vector long long' (vector of 2 'long long' values)' and ''__vector __bool unsigned long long' (vector of 2 'unsigned long long' values)') is deprecated. In the future, the behavior implied by '-fno-lax-vector-conversions' will be the default.}}
+  vbl = vul; // expected-warning {{Implicit conversion between vector types (''__vector unsigned long long' (vector of 2 'unsigned long long' values)' and ''__vector __bool unsigned long long' (vector of 2 'unsigned long long' values)') is deprecated. In the future, the behavior implied by '-fno-lax-vector-conversions' will be the default.}}
+
+  vbc = vsc; // expected-warning {{Implicit conversion between vector types (''__vector signed char' (vector of 16 'signed char' values)' and ''__vector __bool unsigned char' (vector of 16 'unsigned char' values)') is deprecated. In the future, the behavior implied by '-fno-lax-vector-conversions' will be the default.}}
+  vbc = vuc; // expected-warning {{Implicit conversion between vector types (''__vector unsigned char' (vector of 16 'unsigned char' values)' and ''__vector __bool unsigned char' (vector of 16 'unsigned char' values)') is deprecated. In the future, the behavior implied by '-fno-lax-vector-conversions' will be the default.}}
+}
+
+void test_pixel_compat(void) {
+  vp = vbs; // expected-warning {{Implicit conversion between vector types (''__vector __bool unsigned short' (vector of 8 'unsigned short' values)' and ''__vector __pixel ' (vector of 8 'unsigned short' values)') is deprecated. In the future, the behavior implied by '-fno-lax-vector-conversions' will be the default.}}
+  vp = vss; // expected-warning {{Implicit conversion between vector types (''__vector short' (vector of 8 'short' values)' and ''__vector __pixel ' (vector of 8 'unsigned short' values)') is deprecated. In the future, the behavior implied by '-fno-lax-vector-conversions' will be the default.}}
+  vp = vus; // expected-warning {{Implicit conversion between vector types (''__vector unsigned short' (vector of 8 'unsigned short' values)' and ''__vector __pixel ' (vector of 8 'unsigned short' values)') is deprecated. In the future, the behavior implied by '-fno-lax-vector-conversions' will be the default.}}
+
+  vp = vbi; // expected-warning {{Implicit conversion between vector types (''__vector __bool unsigned int' (vector of 4 'unsigned int' values)' and ''__vector __pixel ' (vector of 8 'unsigned short' values)') is deprecated. In the future, the behavior implied by '-fno-lax-vector-conversions' will be the default.}}
+  vp = vsi; // expected-warning {{Implicit conversion between vector types (''__vector int' (vector of 4 'int' values)' and ''__vector __pixel ' (vector of 8 'unsigned short' values)') is deprecated. In the future, the behavior implied by '-fno-lax-vector-conversions' will be the default.}}
+  vp = vui; // expected-warning {{Implicit conversion between vector types (''__vector unsigned int' (vector of 4 'unsigned int' values)' and ''__vector __pixel ' (vector of 8 'unsigned short' values)') is deprecated. In the future, the behavior implied by '-fno-lax-vector-conversions' will be the default.}}
+
+  vp = vbl; // expected-warning {{Implicit conversion between vector types (''__vector __bool unsigned long long' (vector of 2 'unsigned long long' values)' and ''__vector __pixel ' (vector of 8 'unsigned short' values)') is deprecated. In the future, the behavior implied by '-fno-lax-vector-conversions' will be the default.}}
+  vp = vsl; // expected-warning {{Implicit conversion between vector types (''__vector long long' (vector of 2 'long long' values)' and ''__vector __pixel ' (vector of 8 'unsigned short' values)') is deprecated. In the future, the behavior implied by '-fno-lax-vector-conversions' will be the default.}}
+  vp = vul; // expected-warning {{Implicit conversion between vector types (''__vector unsigned long long' (vector of 2 'unsigned long long' values)' and ''__vector __pixel ' (vector of 8 'unsigned short' values)') is deprecated. In the future, the behavior implied by '-fno-lax-vector-conversions' will be the default.}}
+
+  vp = vbc; // expected-warning {{Implicit conversion between vector types (''__vector __bool unsigned char' (vector of 16 'unsigned char' values)' and ''__vector __pixel ' (vector of 8 'unsigned short' values)') is deprecated. In the future, the behavior implied by '-fno-lax-vector-conversions' will be the default.}}
+  vp = vsc; // expected-warning {{Implicit conversion between vector types (''__vector signed char' (vector of 16 'signed char' values)' and ''__vector __pixel ' (vector of 8 'unsigned short' values)') is deprecated. In the future, the behavior implied by '-fno-lax-vector-conversions' will be the default.}}
+  vp = vuc; // expected-warning {{Implicit conversion between vector types (''__vector unsigned char' (vector of 16 'unsigned char' values)' and ''__vector __pixel ' (vector of 8 'unsigned short' values)') is deprecated. In the future, the behavior implied by '-fno-lax-vector-conversions' will be the default.}}
+}