Add platform guards to PPC vector intrinsics headers.

[qiucf]

Summary

Intrinsic headers are supported only on 64-bit PowerPC. This patch is to move the platform check out of PPC Linux toolchain code and add platform guards to the intrinsic headers.

[jsji]

LGTM.

cfe/trunk/lib/Driver/ToolChains/PPCLinux.cpp

 #include "clang/Driver/Options.h"
 #include "llvm/Support/Path.h"
 
 using namespace clang::driver::toolchains;
 using namespace llvm::opt;
 
 void PPCLinuxToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
                                                   ArgStringList &CC1Args) const {
-  // PPC wrapper headers are implementation of x86 intrinsics on PowerPC, which
-  // is not supported on PPC32 platform.
-  if (getArch() != llvm::Triple::ppc &&
-      !DriverArgs.hasArg(clang::driver::options::OPT_nostdinc) &&
+  if (!DriverArgs.hasArg(clang::driver::options::OPT_nostdinc) &&
       !DriverArgs.hasArg(options::OPT_nobuiltininc)) {
     const Driver &D = getDriver();
     SmallString<128> P(D.ResourceDir);
     llvm::sys::path::append(P, "include", "ppc_wrappers");
     addSystemInclude(DriverArgs, CC1Args, P);
   }
 
   Linux::AddClangSystemIncludeArgs(DriverArgs, CC1Args);
 }

cfe/trunk/lib/Headers/ppc_wrappers/emmintrin.h

/* This header file is to help porting code using Intel intrinsics
    use vector SIMD operations. We recommend this for new applications.
 */
 #error "Please read comment above.  Use -DNO_WARN_X86_INTRINSICS to disable this error."
 #endif
 
 #ifndef EMMINTRIN_H_
 #define EMMINTRIN_H_
 
+#if defined(__linux__) && defined(__ppc64__)
+
 #include <altivec.h>
 
 /* We need definitions from the SSE header files.  */
 #include <xmmintrin.h>
 
 /* SSE2 */
 typedef __vector double __v2df;
 typedef __vector long long __v2di;

 }
 
 extern __inline __m128d __attribute__((__gnu_inline__, __always_inline__, __artificial__))
 _mm_castsi128_pd(__m128i __A)
 {
   return (__m128d) __A;
 }
 
+#else
+#include_next <emmintrin.h>
+#endif /* defined(__linux__) && defined(__ppc64__) */
+
 #endif /* EMMINTRIN_H_ */

cfe/trunk/lib/Headers/ppc_wrappers/mm_malloc.h

 /*===---- mm_malloc.h - Implementation of _mm_malloc and _mm_free ----------===
  *
  * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  * See https://llvm.org/LICENSE.txt for license information.
  * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  *
  *===-----------------------------------------------------------------------===
  */
 
 #ifndef _MM_MALLOC_H_INCLUDED
 #define _MM_MALLOC_H_INCLUDED
 
+#if defined(__linux__) && defined(__ppc64__)
+
 #include <stdlib.h>
 
 /* We can't depend on <stdlib.h> since the prototype of posix_memalign
    may not be visible.  */
 #ifndef __cplusplus
 extern int posix_memalign (void **, size_t, size_t);
 #else
 extern "C" int posix_memalign (void **, size_t, size_t) throw ();

 }
 
 static __inline void
 _mm_free (void * ptr)
 {
   free (ptr);
 }
 
+#else
+#include_next <mm_malloc.h>
+#endif
+
 #endif /* _MM_MALLOC_H_INCLUDED */

cfe/trunk/lib/Headers/ppc_wrappers/mmintrin.h

/* This header file is to help porting code using Intel intrinsics
    recommended. */
 #error                                                                         \
     "Please read comment above.  Use -DNO_WARN_X86_INTRINSICS to disable this error."
 #endif
 
 #ifndef _MMINTRIN_H_INCLUDED
 #define _MMINTRIN_H_INCLUDED
 
+#if defined(__linux__) && defined(__ppc64__)
+
 #include <altivec.h>
 /* The Intel API is flexible enough that we must allow aliasing with other
    vector types, and their scalar components.  */
 typedef __attribute__((__aligned__(8))) unsigned long long __m64;
 
 typedef __attribute__((__aligned__(8))) union {
   __m64 as_m64;
   char as_char[8];
#else
   res.as_char[3] = __b;
   res.as_char[4] = __b;
   res.as_char[5] = __b;
   res.as_char[6] = __b;
   res.as_char[7] = __b;
   return (res.as_m64);
 #endif
 }
+
+#else
+#include_next <mmintrin.h>
+#endif /* defined(__linux__) && defined(__ppc64__) */
+
 #endif /* _MMINTRIN_H_INCLUDED */

cfe/trunk/lib/Headers/ppc_wrappers/xmmintrin.h

/* This header file is to help porting code using Intel intrinsics
    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."
 #endif
 
 #ifndef _XMMINTRIN_H_INCLUDED
 #define _XMMINTRIN_H_INCLUDED
 
+#if defined(__linux__) && defined(__ppc64__)
+
 /* Define four value permute mask */
 #define _MM_SHUFFLE(w,x,y,z) (((w) << 6) | ((x) << 4) | ((y) << 2) | (z))
 
 #include <altivec.h>
 
 /* Avoid collisions between altivec.h and strict adherence to C++ and
    C11 standards.  This should eventually be done inside altivec.h itself,
    but only after testing a full distro build.  */
(row2) = (__v4sf)vec_mergeh ((__vector long long)__t2,  \
              (__vector long long)__t3); \
   (row3) = (__v4sf)vec_mergel ((__vector long long)__t2,  \
              (__vector long long)__t3); \
 } while (0)
 
 /* For backward source compatibility.  */
 //# include <emmintrin.h>
 
+#else
+#include_next <xmmintrin.h>
+#endif /* defined(__linux__) && defined(__ppc64__) */
+
 #endif /* _XMMINTRIN_H_INCLUDED */