[Headers][X86] Allow _mm_max_pu8 / _mm_min_pu8 to be used in constexpr (#160489)

These were missed in an earlier patch

Author: RKSimon

clang/lib/Headers/xmmintrin.h

@@ -2363,9 +2363,8 @@ _mm_max_pi16(__m64 __a, __m64 __b) {
 /// \param __b
 ///    A 64-bit integer vector containing one of the source operands.
 /// \returns A 64-bit integer vector containing the comparison results.
-static __inline__ __m64 __DEFAULT_FN_ATTRS_SSE2
-_mm_max_pu8(__m64 __a, __m64 __b)
-{
+static __inline__ __m64 __DEFAULT_FN_ATTRS_SSE2_CONSTEXPR
+_mm_max_pu8(__m64 __a, __m64 __b) {
   return (__m64)__builtin_elementwise_max((__v8qu)__a, (__v8qu)__b);
 }
 
@@ -2400,9 +2399,8 @@ _mm_min_pi16(__m64 __a, __m64 __b) {
 /// \param __b
 ///    A 64-bit integer vector containing one of the source operands.
 /// \returns A 64-bit integer vector containing the comparison results.
-static __inline__ __m64 __DEFAULT_FN_ATTRS_SSE2
-_mm_min_pu8(__m64 __a, __m64 __b)
-{
+static __inline__ __m64 __DEFAULT_FN_ATTRS_SSE2_CONSTEXPR
+_mm_min_pu8(__m64 __a, __m64 __b) {
   return (__m64)__builtin_elementwise_min((__v8qu)__a, (__v8qu)__b);
 }
 

clang/test/CodeGen/X86/mmx-builtins.c

@@ -371,28 +371,28 @@ __m64 test_mm_max_pi16(__m64 a, __m64 b) {
   // CHECK: call <4 x i16> @llvm.smax.v4i16(
   return _mm_max_pi16(a, b);
 }
-
 TEST_CONSTEXPR(match_v4hi(_mm_max_pi16((__m64)(__v4hi){+1, -2, +3, -4}, (__m64)(__v4hi){-1, 2, -3, 4}), 1, 2, 3, 4));
 
 __m64 test_mm_max_pu8(__m64 a, __m64 b) {
   // CHECK-LABEL: test_mm_max_pu8
   // CHECK: call <8 x i8> @llvm.umax.v8i8(
   return _mm_max_pu8(a, b);
 }
+TEST_CONSTEXPR(match_v8qi(_mm_max_pu8((__m64)(__v8qs){ 16, 17, 18, -19, -20, 21, -22, -23}, (__m64)(__v8qs){ 1, -2, -3, 4, 5, 0, 7, -8}),  16, -2, -3, -19, -20, 21, -22, -8));
 
 __m64 test_mm_min_pi16(__m64 a, __m64 b) {
   // CHECK-LABEL: test_mm_min_pi16
   // CHECK: call <4 x i16> @llvm.smin.v4i16(
   return _mm_min_pi16(a, b);
 }
-
 TEST_CONSTEXPR(match_v4hi(_mm_min_pi16((__m64)(__v4hi){+1, -2, +3, -4}, (__m64)(__v4hi){-1, 2, -3, 4}), -1, -2, -3, -4));
 
 __m64 test_mm_min_pu8(__m64 a, __m64 b) {
   // CHECK-LABEL: test_mm_min_pu8
   // CHECK: call <8 x i8> @llvm.umin.v8i8(
   return _mm_min_pu8(a, b);
 }
+TEST_CONSTEXPR(match_v8qi(_mm_min_pu8((__m64)(__v8qs){ 16, 17, 18, -19, -20, 21, -22, -23}, (__m64)(__v8qs){ 1, -2, -3, 4, 5, 0, 7, -8}),  1, 17, 18, 4, 5, 0, 7, -23));
 
 int test_mm_movemask_pi8(__m64 a) {
   // CHECK-LABEL: test_mm_movemask_pi8