[X86] Mark various pointer arguments in builtins as const

Enabling `-Wcast-qual` identified many casts in various system headers
that were dropping the `const` qualifier.  Fixing those missing
qualifiers pointed out that a few of the definitions of the builtins
did not properly identify their arguments as `const` pointers.  This
commit fixes those builtin definitions, and the system header files
so that they no longer drop the qualifier.

Differential Revision: https://reviews.llvm.org/D71718

1 files changed, 3 insertions, 3 deletions

diff --git a/clang/lib/Headers/immintrin.h b/clang/lib/Headers/immintrin.h
index ae900ee85b7..edf8c42ec49 100644
--- a/clang/lib/Headers/immintrin.h
+++ b/clang/lib/Headers/immintrin.h
@@ -301,7 +301,7 @@ _loadbe_i16(void const * __P) {
   struct __loadu_i16 {
     short __v;
   } __attribute__((__packed__, __may_alias__));
-  return __builtin_bswap16(((struct __loadu_i16*)__P)->__v);
+  return __builtin_bswap16(((const struct __loadu_i16*)__P)->__v);
 }
 
 static __inline__ void __attribute__((__always_inline__, __nodebug__, __target__("movbe")))
@@ -317,7 +317,7 @@ _loadbe_i32(void const * __P) {
   struct __loadu_i32 {
     int __v;
   } __attribute__((__packed__, __may_alias__));
-  return __builtin_bswap32(((struct __loadu_i32*)__P)->__v);
+  return __builtin_bswap32(((const struct __loadu_i32*)__P)->__v);
 }
 
 static __inline__ void __attribute__((__always_inline__, __nodebug__, __target__("movbe")))
@@ -334,7 +334,7 @@ _loadbe_i64(void const * __P) {
   struct __loadu_i64 {
     long long __v;
   } __attribute__((__packed__, __may_alias__));
-  return __builtin_bswap64(((struct __loadu_i64*)__P)->__v);
+  return __builtin_bswap64(((const struct __loadu_i64*)__P)->__v);
 }
 
 static __inline__ void __attribute__((__always_inline__, __nodebug__, __target__("movbe")))