[PowerPC] Fix x86 vector intrinsics wrapper compilation under C++

Reviewed By: nemanjai

Differential Revision: https://reviews.llvm.org/D103386

(cherry picked from commit c0b3071)

Author: ecnelises

clang/lib/Headers/ppc_wrappers/xmmintrin.h

@@ -28,7 +28,7 @@
    Most SSE scalar float intrinsic operations can be performed more
    efficiently as C language float scalar operations or optimized to
    use vector SIMD operations. We recommend this for new applications. */
-#error "Please read comment above.  Use -DNO_WARN_X86_INTRINSICS to disable this error."
+#error "Please read comment above. Use -DNO_WARN_X86_INTRINSICS to disable this error."
 #endif
 
 #ifndef _XMMINTRIN_H_INCLUDED
@@ -62,14 +62,13 @@
 
 /* The Intel API is flexible enough that we must allow aliasing with other
    vector types, and their scalar components.  */
-typedef float __m128 __attribute__ ((__vector_size__ (16), __may_alias__));
+typedef vector float __m128 __attribute__((__may_alias__));
 
 /* Unaligned version of the same type.  */
-typedef float __m128_u __attribute__ ((__vector_size__ (16), __may_alias__,
-				       __aligned__ (1)));
+typedef vector float __m128_u __attribute__((__may_alias__, __aligned__(1)));
 
 /* Internal data types for implementing the intrinsics.  */
-typedef float __v4sf __attribute__ ((__vector_size__ (16)));
+typedef vector float __v4sf;
 
 /* Create an undefined vector.  */
 extern __inline __m128 __attribute__((__gnu_inline__, __always_inline__, __artificial__))

clang/test/CodeGen/ppc-xmmintrin.c

@@ -3,8 +3,12 @@
 
 // RUN: %clang -S -emit-llvm -target powerpc64-unknown-linux-gnu -mcpu=pwr8 -ffreestanding -DNO_WARN_X86_INTRINSICS %s \
 // RUN:   -fno-discard-value-names -mllvm -disable-llvm-optzns -o - | llvm-cxxfilt -n | FileCheck %s --check-prefixes=CHECK,CHECK-BE
+// RUN: %clang -x c++ -fsyntax-only -target powerpc64-unknown-linux-gnu -mcpu=pwr8 -ffreestanding -DNO_WARN_X86_INTRINSICS %s \
+// RUN:   -fno-discard-value-names -mllvm -disable-llvm-optzns
 // RUN: %clang -S -emit-llvm -target powerpc64le-unknown-linux-gnu -mcpu=pwr8 -ffreestanding -DNO_WARN_X86_INTRINSICS %s \
 // RUN:   -fno-discard-value-names -mllvm -disable-llvm-optzns -o - | llvm-cxxfilt -n | FileCheck %s --check-prefixes=CHECK,CHECK-LE
+// RUN: %clang -x c++ -fsyntax-only -target powerpc64le-unknown-linux-gnu -mcpu=pwr8 -ffreestanding -DNO_WARN_X86_INTRINSICS %s \
+// RUN:   -fno-discard-value-names -mllvm -disable-llvm-optzns
 
 #include <xmmintrin.h>
 
@@ -1426,7 +1430,7 @@ test_mul() {
 
 void __attribute__((noinline))
 test_prefetch() {
-  _mm_prefetch(ms, i);
+  _mm_prefetch(ms, _MM_HINT_NTA);
 }
 
 // CHECK-LABEL: @test_prefetch