[X86][AVX512] _mm512_stream_load_si512 should take a void const* argument (PR33977)

[RKSimon]

Summary

Based off the Intel Intrinsics guide, we should expect a void const* argument.

Prevents 'passing 'const void *' to parameter of type 'void *' discards qualifiers' warnings.

[delena]

LGTM

cfe/trunk/lib/Headers/avx512fintrin.h

 static __inline__ void __DEFAULT_FN_ATTRS
 _mm512_stream_si512 (__m512i * __P, __m512i __A)
 {
   typedef __v8di __v8di_aligned __attribute__((aligned(64)));
   __builtin_nontemporal_store((__v8di_aligned)__A, (__v8di_aligned*)__P);
 }
 
 static __inline__ __m512i __DEFAULT_FN_ATTRS
-_mm512_stream_load_si512 (void *__P)
+_mm512_stream_load_si512 (void const *__P)
 {
   typedef __v8di __v8di_aligned __attribute__((aligned(64)));
   return (__m512i) __builtin_nontemporal_load((const __v8di_aligned *)__P);
 }
 
 static __inline__ void __DEFAULT_FN_ATTRS
 _mm512_stream_pd (double *__P, __m512d __A)
 {

cfe/trunk/test/CodeGen/avx512f-builtins.c

 }
 
 __m512i test_mm512_stream_load_si512(void *__P) {
   // CHECK-LABEL: @test_mm512_stream_load_si512
   // CHECK: load <8 x i64>, <8 x i64>* %{{.*}}, align 64, !nontemporal
   return _mm512_stream_load_si512(__P); 
 }
 
+__m512i test_mm512_stream_load_si512_const(void const *__P) {
+  // CHECK-LABEL: @test_mm512_stream_load_si512_const
+  // CHECK: load <8 x i64>, <8 x i64>* %{{.*}}, align 64, !nontemporal
+  return _mm512_stream_load_si512(__P); 
+}
+
 void test_mm512_stream_pd(double *__P, __m512d __A) {
   // CHECK-LABEL: @test_mm512_stream_pd
   // CHECK: store <8 x double> %{{.*}}, <8 x double>* %{{.*}}, align 64, !nontemporal
   return _mm512_stream_pd(__P, __A); 
 }
 
 void test_mm512_stream_ps(float *__P, __m512 __A) {
   // CHECK-LABEL: @test_mm512_stream_ps