[X86] Implement __readgsqword (and the rest) as builtins (PR32373)

It seems MS headers have started using __readgsqword, and since it's
used in a header that doesn't include intrin.h, we can't implement it as
an inline function anymore.

That was already the case for __readfsdword, which Saleem added support
for in r220859. This patch reuses that codegen to implement all of
__read[fg]s{byte,word,dword,qword}.

Differential Revision: https://reviews.llvm.org/D31248

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@298538 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 43 deletions

diff --git a/lib/Headers/intrin.h b/lib/Headers/intrin.h
index af87914a9a..16028d5c6b 100644
--- a/lib/Headers/intrin.h
+++ b/lib/Headers/intrin.h
@@ -869,50 +869,7 @@ _InterlockedCompareExchange64_rel(__int64 volatile *_Destination,
   return _Comparand;
 }
 #endif
-/*----------------------------------------------------------------------------*\
-|* readfs, readgs
-|* (Pointers in address space #256 and #257 are relative to the GS and FS
-|* segment registers, respectively.)
-\*----------------------------------------------------------------------------*/
-#define __ptr_to_addr_space(__addr_space_nbr, __type, __offset)              \
-    ((volatile __type __attribute__((__address_space__(__addr_space_nbr)))*) \
-    (__offset))
 
-#ifdef __i386__
-static __inline__ unsigned char __DEFAULT_FN_ATTRS
-__readfsbyte(unsigned long __offset) {
-  return *__ptr_to_addr_space(257, unsigned char, __offset);
-}
-static __inline__ unsigned short __DEFAULT_FN_ATTRS
-__readfsword(unsigned long __offset) {
-  return *__ptr_to_addr_space(257, unsigned short, __offset);
-}
-static __inline__ unsigned __int64 __DEFAULT_FN_ATTRS
-__readfsqword(unsigned long __offset) {
-  return *__ptr_to_addr_space(257, unsigned __int64, __offset);
-}
-#endif
-#ifdef __x86_64__
-static __inline__ unsigned char __DEFAULT_FN_ATTRS
-__readgsbyte(unsigned long __offset) {
-  return *__ptr_to_addr_space(256, unsigned char, (unsigned long long)__offset);
-}
-static __inline__ unsigned short __DEFAULT_FN_ATTRS
-__readgsword(unsigned long __offset) {
-  return *__ptr_to_addr_space(256, unsigned short,
-                              (unsigned long long)__offset);
-}
-static __inline__ unsigned long __DEFAULT_FN_ATTRS
-__readgsdword(unsigned long __offset) {
-  return *__ptr_to_addr_space(256, unsigned long, (unsigned long long)__offset);
-}
-static __inline__ unsigned __int64 __DEFAULT_FN_ATTRS
-__readgsqword(unsigned long __offset) {
-  return *__ptr_to_addr_space(256, unsigned __int64,
-                              (unsigned long long)__offset);
-}
-#endif
-#undef __ptr_to_addr_space
 /*----------------------------------------------------------------------------*\
 |* movs, stos
 \*----------------------------------------------------------------------------*/