[PowerPC] Update altivec.h to use __inline__ for c89 compatibility (#134430)

diff --git a/clang/lib/Headers/altivec.h b/clang/lib/Headers/altivec.h
index 8da6505..71d8d3c 100644
--- a/clang/lib/Headers/altivec.h
+++ b/clang/lib/Headers/altivec.h
@@ -17525,70 +17525,73 @@
 
 /* vec_reve */
 
-static inline __ATTRS_o_ai vector bool char vec_reve(vector bool char __a) {
+static __inline__ __ATTRS_o_ai vector bool char vec_reve(vector bool char __a) {
   return __builtin_shufflevector(__a, __a, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6,
                                  5, 4, 3, 2, 1, 0);
 }
 
-static inline __ATTRS_o_ai vector signed char vec_reve(vector signed char __a) {
+static __inline__ __ATTRS_o_ai vector signed char
+vec_reve(vector signed char __a) {
   return __builtin_shufflevector(__a, __a, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6,
                                  5, 4, 3, 2, 1, 0);
 }
 
-static inline __ATTRS_o_ai vector unsigned char
+static __inline__ __ATTRS_o_ai vector unsigned char
 vec_reve(vector unsigned char __a) {
   return __builtin_shufflevector(__a, __a, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6,
                                  5, 4, 3, 2, 1, 0);
 }
 
-static inline __ATTRS_o_ai vector bool int vec_reve(vector bool int __a) {
+static __inline__ __ATTRS_o_ai vector bool int vec_reve(vector bool int __a) {
   return __builtin_shufflevector(__a, __a, 3, 2, 1, 0);
 }
 
-static inline __ATTRS_o_ai vector signed int vec_reve(vector signed int __a) {
+static __inline__ __ATTRS_o_ai vector signed int
+vec_reve(vector signed int __a) {
   return __builtin_shufflevector(__a, __a, 3, 2, 1, 0);
 }
 
-static inline __ATTRS_o_ai vector unsigned int
+static __inline__ __ATTRS_o_ai vector unsigned int
 vec_reve(vector unsigned int __a) {
   return __builtin_shufflevector(__a, __a, 3, 2, 1, 0);
 }
 
-static inline __ATTRS_o_ai vector bool short vec_reve(vector bool short __a) {
+static __inline__ __ATTRS_o_ai vector bool short
+vec_reve(vector bool short __a) {
   return __builtin_shufflevector(__a, __a, 7, 6, 5, 4, 3, 2, 1, 0);
 }
 
-static inline __ATTRS_o_ai vector signed short
+static __inline__ __ATTRS_o_ai vector signed short
 vec_reve(vector signed short __a) {
   return __builtin_shufflevector(__a, __a, 7, 6, 5, 4, 3, 2, 1, 0);
 }
 
-static inline __ATTRS_o_ai vector unsigned short
+static __inline__ __ATTRS_o_ai vector unsigned short
 vec_reve(vector unsigned short __a) {
   return __builtin_shufflevector(__a, __a, 7, 6, 5, 4, 3, 2, 1, 0);
 }
 
-static inline __ATTRS_o_ai vector float vec_reve(vector float __a) {
+static __inline__ __ATTRS_o_ai vector float vec_reve(vector float __a) {
   return __builtin_shufflevector(__a, __a, 3, 2, 1, 0);
 }
 
 #ifdef __VSX__
-static inline __ATTRS_o_ai vector bool long long
+static __inline__ __ATTRS_o_ai vector bool long long
 vec_reve(vector bool long long __a) {
   return __builtin_shufflevector(__a, __a, 1, 0);
 }
 
-static inline __ATTRS_o_ai vector signed long long
+static __inline__ __ATTRS_o_ai vector signed long long
 vec_reve(vector signed long long __a) {
   return __builtin_shufflevector(__a, __a, 1, 0);
 }
 
-static inline __ATTRS_o_ai vector unsigned long long
+static __inline__ __ATTRS_o_ai vector unsigned long long
 vec_reve(vector unsigned long long __a) {
   return __builtin_shufflevector(__a, __a, 1, 0);
 }
 
-static inline __ATTRS_o_ai vector double vec_reve(vector double __a) {
+static __inline__ __ATTRS_o_ai vector double vec_reve(vector double __a) {
   return __builtin_shufflevector(__a, __a, 1, 0);
 }
 #endif
@@ -17721,42 +17724,42 @@
 typedef vector unsigned int unaligned_vec_uint __attribute__((aligned(1)));
 typedef vector float unaligned_vec_float __attribute__((aligned(1)));
 
-static inline __ATTRS_o_ai vector signed char vec_xl(ptrdiff_t __offset,
-                                                     const signed char *__ptr) {
+static __inline__ __ATTRS_o_ai vector signed char
+vec_xl(ptrdiff_t __offset, const signed char *__ptr) {
   return *(unaligned_vec_schar *)(__ptr + __offset);
 }
 
-static inline __ATTRS_o_ai vector unsigned char
+static __inline__ __ATTRS_o_ai vector unsigned char
 vec_xl(ptrdiff_t __offset, const unsigned char *__ptr) {
   return *(unaligned_vec_uchar*)(__ptr + __offset);
 }
 
-static inline __ATTRS_o_ai vector signed short
+static __inline__ __ATTRS_o_ai vector signed short
 vec_xl(ptrdiff_t __offset, const signed short *__ptr) {
   signed char *__addr = (signed char *)__ptr + __offset;
   return *(unaligned_vec_sshort *)__addr;
 }
 
-static inline __ATTRS_o_ai vector unsigned short
+static __inline__ __ATTRS_o_ai vector unsigned short
 vec_xl(ptrdiff_t __offset, const unsigned short *__ptr) {
   signed char *__addr = (signed char *)__ptr + __offset;
   return *(unaligned_vec_ushort *)__addr;
 }
 
-static inline __ATTRS_o_ai vector signed int vec_xl(ptrdiff_t __offset,
-                                                    const signed int *__ptr) {
+static __inline__ __ATTRS_o_ai vector signed int
+vec_xl(ptrdiff_t __offset, const signed int *__ptr) {
   signed char *__addr = (signed char *)__ptr + __offset;
   return *(unaligned_vec_sint *)__addr;
 }
 
-static inline __ATTRS_o_ai vector unsigned int
+static __inline__ __ATTRS_o_ai vector unsigned int
 vec_xl(ptrdiff_t __offset, const unsigned int *__ptr) {
   signed char *__addr = (signed char *)__ptr + __offset;
   return *(unaligned_vec_uint *)__addr;
 }
 
-static inline __ATTRS_o_ai vector float vec_xl(ptrdiff_t __offset,
-                                               const float *__ptr) {
+static __inline__ __ATTRS_o_ai vector float vec_xl(ptrdiff_t __offset,
+                                                   const float *__ptr) {
   signed char *__addr = (signed char *)__ptr + __offset;
   return *(unaligned_vec_float *)__addr;
 }
@@ -17766,20 +17769,20 @@
 typedef vector unsigned long long unaligned_vec_ull __attribute__((aligned(1)));
 typedef vector double unaligned_vec_double __attribute__((aligned(1)));
 
-static inline __ATTRS_o_ai vector signed long long
+static __inline__ __ATTRS_o_ai vector signed long long
 vec_xl(ptrdiff_t __offset, const signed long long *__ptr) {
   signed char *__addr = (signed char *)__ptr + __offset;
   return *(unaligned_vec_sll *)__addr;
 }
 
-static inline __ATTRS_o_ai vector unsigned long long
+static __inline__ __ATTRS_o_ai vector unsigned long long
 vec_xl(ptrdiff_t __offset, const unsigned long long *__ptr) {
   signed char *__addr = (signed char *)__ptr + __offset;
   return *(unaligned_vec_ull *)__addr;
 }
 
-static inline __ATTRS_o_ai vector double vec_xl(ptrdiff_t __offset,
-                                                const double *__ptr) {
+static __inline__ __ATTRS_o_ai vector double vec_xl(ptrdiff_t __offset,
+                                                    const double *__ptr) {
   signed char *__addr = (signed char *)__ptr + __offset;
   return *(unaligned_vec_double *)__addr;
 }
@@ -17790,13 +17793,13 @@
 typedef vector signed __int128 unaligned_vec_si128 __attribute__((aligned(1)));
 typedef vector unsigned __int128 unaligned_vec_ui128
     __attribute__((aligned(1)));
-static inline __ATTRS_o_ai vector signed __int128
+static __inline__ __ATTRS_o_ai vector signed __int128
 vec_xl(ptrdiff_t __offset, const signed __int128 *__ptr) {
   signed char *__addr = (signed char *)__ptr + __offset;
   return *(unaligned_vec_si128 *)__addr;
 }
 
-static inline __ATTRS_o_ai vector unsigned __int128
+static __inline__ __ATTRS_o_ai vector unsigned __int128
 vec_xl(ptrdiff_t __offset, const unsigned __int128 *__ptr) {
   signed char *__addr = (signed char *)__ptr + __offset;
   return *(unaligned_vec_ui128 *)__addr;
@@ -17991,64 +17994,64 @@
 
 #define vec_xstd2 vec_xst
 #define vec_xstw4 vec_xst
-static inline __ATTRS_o_ai void
+static __inline__ __ATTRS_o_ai void
 vec_xst(vector signed char __vec, ptrdiff_t __offset, signed char *__ptr) {
   *(unaligned_vec_schar *)(__ptr + __offset) = __vec;
 }
 
-static inline __ATTRS_o_ai void
+static __inline__ __ATTRS_o_ai void
 vec_xst(vector unsigned char __vec, ptrdiff_t __offset, unsigned char *__ptr) {
   *(unaligned_vec_uchar *)(__ptr + __offset) = __vec;
 }
 
-static inline __ATTRS_o_ai void
+static __inline__ __ATTRS_o_ai void
 vec_xst(vector signed short __vec, ptrdiff_t __offset, signed short *__ptr) {
   signed char *__addr = (signed char *)__ptr + __offset;
   *(unaligned_vec_sshort *)__addr = __vec;
 }
 
-static inline __ATTRS_o_ai void vec_xst(vector unsigned short __vec,
-                                        ptrdiff_t __offset,
-                                        unsigned short *__ptr) {
+static __inline__ __ATTRS_o_ai void vec_xst(vector unsigned short __vec,
+                                            ptrdiff_t __offset,
+                                            unsigned short *__ptr) {
   signed char *__addr = (signed char *)__ptr + __offset;
   *(unaligned_vec_ushort *)__addr = __vec;
 }
 
-static inline __ATTRS_o_ai void vec_xst(vector signed int __vec,
-                                        ptrdiff_t __offset, signed int *__ptr) {
+static __inline__ __ATTRS_o_ai void
+vec_xst(vector signed int __vec, ptrdiff_t __offset, signed int *__ptr) {
   signed char *__addr = (signed char *)__ptr + __offset;
   *(unaligned_vec_sint *)__addr = __vec;
 }
 
-static inline __ATTRS_o_ai void
+static __inline__ __ATTRS_o_ai void
 vec_xst(vector unsigned int __vec, ptrdiff_t __offset, unsigned int *__ptr) {
   signed char *__addr = (signed char *)__ptr + __offset;
   *(unaligned_vec_uint *)__addr = __vec;
 }
 
-static inline __ATTRS_o_ai void vec_xst(vector float __vec, ptrdiff_t __offset,
-                                        float *__ptr) {
+static __inline__ __ATTRS_o_ai void vec_xst(vector float __vec,
+                                            ptrdiff_t __offset, float *__ptr) {
   signed char *__addr = (signed char *)__ptr + __offset;
   *(unaligned_vec_float *)__addr = __vec;
 }
 
 #ifdef __VSX__
-static inline __ATTRS_o_ai void vec_xst(vector signed long long __vec,
-                                        ptrdiff_t __offset,
-                                        signed long long *__ptr) {
+static __inline__ __ATTRS_o_ai void vec_xst(vector signed long long __vec,
+                                            ptrdiff_t __offset,
+                                            signed long long *__ptr) {
   signed char *__addr = (signed char *)__ptr + __offset;
   *(unaligned_vec_sll *)__addr = __vec;
 }
 
-static inline __ATTRS_o_ai void vec_xst(vector unsigned long long __vec,
-                                        ptrdiff_t __offset,
-                                        unsigned long long *__ptr) {
+static __inline__ __ATTRS_o_ai void vec_xst(vector unsigned long long __vec,
+                                            ptrdiff_t __offset,
+                                            unsigned long long *__ptr) {
   signed char *__addr = (signed char *)__ptr + __offset;
   *(unaligned_vec_ull *)__addr = __vec;
 }
 
-static inline __ATTRS_o_ai void vec_xst(vector double __vec, ptrdiff_t __offset,
-                                        double *__ptr) {
+static __inline__ __ATTRS_o_ai void vec_xst(vector double __vec,
+                                            ptrdiff_t __offset, double *__ptr) {
   signed char *__addr = (signed char *)__ptr + __offset;
   *(unaligned_vec_double *)__addr = __vec;
 }
@@ -18056,16 +18059,16 @@
 
 #if defined(__POWER8_VECTOR__) && defined(__powerpc64__) &&                    \
     defined(__SIZEOF_INT128__)
-static inline __ATTRS_o_ai void vec_xst(vector signed __int128 __vec,
-                                        ptrdiff_t __offset,
-                                        signed __int128 *__ptr) {
+static __inline__ __ATTRS_o_ai void vec_xst(vector signed __int128 __vec,
+                                            ptrdiff_t __offset,
+                                            signed __int128 *__ptr) {
   signed char *__addr = (signed char *)__ptr + __offset;
   *(unaligned_vec_si128 *)__addr = __vec;
 }
 
-static inline __ATTRS_o_ai void vec_xst(vector unsigned __int128 __vec,
-                                        ptrdiff_t __offset,
-                                        unsigned __int128 *__ptr) {
+static __inline__ __ATTRS_o_ai void vec_xst(vector unsigned __int128 __vec,
+                                            ptrdiff_t __offset,
+                                            unsigned __int128 *__ptr) {
   signed char *__addr = (signed char *)__ptr + __offset;
   *(unaligned_vec_ui128 *)__addr = __vec;
 }
@@ -18075,51 +18078,51 @@
 
 #if defined(__POWER10_VECTOR__) && defined(__VSX__) &&                         \
     defined(__SIZEOF_INT128__)
-static inline __ATTRS_o_ai void vec_xst_trunc(vector signed __int128 __vec,
-                                              ptrdiff_t __offset,
-                                              signed char *__ptr) {
+static __inline__ __ATTRS_o_ai void vec_xst_trunc(vector signed __int128 __vec,
+                                                  ptrdiff_t __offset,
+                                                  signed char *__ptr) {
   *(__ptr + __offset) = (signed char)__vec[0];
 }
 
-static inline __ATTRS_o_ai void vec_xst_trunc(vector unsigned __int128 __vec,
-                                              ptrdiff_t __offset,
-                                              unsigned char *__ptr) {
+static __inline__ __ATTRS_o_ai void
+vec_xst_trunc(vector unsigned __int128 __vec, ptrdiff_t __offset,
+              unsigned char *__ptr) {
   *(__ptr + __offset) = (unsigned char)__vec[0];
 }
 
-static inline __ATTRS_o_ai void vec_xst_trunc(vector signed __int128 __vec,
-                                              ptrdiff_t __offset,
-                                              signed short *__ptr) {
+static __inline__ __ATTRS_o_ai void vec_xst_trunc(vector signed __int128 __vec,
+                                                  ptrdiff_t __offset,
+                                                  signed short *__ptr) {
   *(__ptr + __offset) = (signed short)__vec[0];
 }
 
-static inline __ATTRS_o_ai void vec_xst_trunc(vector unsigned __int128 __vec,
-                                              ptrdiff_t __offset,
-                                              unsigned short *__ptr) {
+static __inline__ __ATTRS_o_ai void
+vec_xst_trunc(vector unsigned __int128 __vec, ptrdiff_t __offset,
+              unsigned short *__ptr) {
   *(__ptr + __offset) = (unsigned short)__vec[0];
 }
 
-static inline __ATTRS_o_ai void vec_xst_trunc(vector signed __int128 __vec,
-                                              ptrdiff_t __offset,
-                                              signed int *__ptr) {
+static __inline__ __ATTRS_o_ai void vec_xst_trunc(vector signed __int128 __vec,
+                                                  ptrdiff_t __offset,
+                                                  signed int *__ptr) {
   *(__ptr + __offset) = (signed int)__vec[0];
 }
 
-static inline __ATTRS_o_ai void vec_xst_trunc(vector unsigned __int128 __vec,
-                                              ptrdiff_t __offset,
-                                              unsigned int *__ptr) {
+static __inline__ __ATTRS_o_ai void
+vec_xst_trunc(vector unsigned __int128 __vec, ptrdiff_t __offset,
+              unsigned int *__ptr) {
   *(__ptr + __offset) = (unsigned int)__vec[0];
 }
 
-static inline __ATTRS_o_ai void vec_xst_trunc(vector signed __int128 __vec,
-                                              ptrdiff_t __offset,
-                                              signed long long *__ptr) {
+static __inline__ __ATTRS_o_ai void vec_xst_trunc(vector signed __int128 __vec,
+                                                  ptrdiff_t __offset,
+                                                  signed long long *__ptr) {
   *(__ptr + __offset) = (signed long long)__vec[0];
 }
 
-static inline __ATTRS_o_ai void vec_xst_trunc(vector unsigned __int128 __vec,
-                                              ptrdiff_t __offset,
-                                              unsigned long long *__ptr) {
+static __inline__ __ATTRS_o_ai void
+vec_xst_trunc(vector unsigned __int128 __vec, ptrdiff_t __offset,
+              unsigned long long *__ptr) {
   *(__ptr + __offset) = (unsigned long long)__vec[0];
 }
 #endif
diff --git a/clang/test/Headers/altivec-header.c b/clang/test/Headers/altivec-header.c
index 00e5f44..67aee4b 100644
--- a/clang/test/Headers/altivec-header.c
+++ b/clang/test/Headers/altivec-header.c
@@ -1,5 +1,6 @@
 // RUN: %clang_cc1 -triple powerpc64-unknown-unknown -target-feature +altivec -ffreestanding -emit-llvm -o - %s | FileCheck %s
 // RUN: %clang_cc1 -triple powerpc64-unknown-unknown -target-feature +altivec -ffreestanding -emit-llvm -flax-vector-conversions=none -o - %s | FileCheck %s
+// RUN: %clang_cc1 -std=c89 -triple powerpc64-unknown-unknown -target-feature +altivec -ffreestanding -emit-llvm -o - %s | FileCheck %s
 // RUN: %clang_cc1 -triple powerpc64-unknown-unknown -target-feature +altivec -ffreestanding -emit-llvm -x c++ -o - %s | FileCheck %s
 
 #include <altivec.h>