[Linux] Revert 1e56821

The glibc issue mentioned in #47994 has been fixed upstream.

Author: brad0

clang/lib/Basic/Targets/OSTargets.h

@@ -387,9 +387,6 @@ class LLVM_LIBRARY_VISIBILITY LinuxTargetInfo : public OSTargetInfo<Target> {
     } else {
         Builder.defineMacro("__gnu_linux__");
     }
-    // Work around Issue #47994 until glibc PR build/27558 is fixed.
-    if (Triple.isSPARC())
-      Builder.defineMacro("__NO_INLINE__");
     if (Opts.POSIXThreads)
       Builder.defineMacro("_REENTRANT");
     if (Opts.CPlusPlus)

clang/test/Preprocessor/init.c

@@ -874,9 +874,6 @@
 
 // RUN: %clang_cc1 -E -dM -ffreestanding -fgnuc-version=4.2.1 -triple=sparc-none-none < /dev/null | FileCheck -match-full-lines -check-prefix SPARC -check-prefix SPARC-DEFAULT %s
 // RUN: %clang_cc1 -E -dM -ffreestanding -fgnuc-version=4.2.1 -triple=sparc-rtems-elf < /dev/null | FileCheck -match-full-lines -check-prefix SPARC -check-prefix SPARC-DEFAULT %s
-// Check that clang defines __NO_INLINE__ unconditionally (even at -O) to
-// work around Issue #47994.
-// RUN: %clang_cc1 -E -dM -triple=sparc-unknown-linux-gnu -O < /dev/null | FileCheck -match-full-lines -check-prefix SPARC-LINUX %s
 // RUN: %clang_cc1 -E -dM -ffreestanding -fgnuc-version=4.2.1 -triple=sparc-none-netbsd < /dev/null | FileCheck -match-full-lines -check-prefix SPARC -check-prefix SPARC-NETOPENBSD %s
 // RUN: %clang_cc1 -x c++ -E -dM -ffreestanding -fgnuc-version=4.2.1 -triple=sparc-none-none < /dev/null | FileCheck -match-full-lines -check-prefix SPARC -check-prefix SPARC-DEFAULT -check-prefix SPARC-DEFAULT-CXX %s
 //
@@ -1000,7 +997,6 @@
 // SPARC:#define __LONG_LONG_MAX__ 9223372036854775807LL
 // SPARC:#define __LONG_MAX__ 2147483647L
 // SPARC-NOT:#define __LP64__
-// SPARC-LINUX:#define __NO_INLINE__ 1
 // SPARC:#define __POINTER_WIDTH__ 32
 // SPARC-DEFAULT:#define __PTRDIFF_TYPE__ int
 // SPARC-NETOPENBSD:#define __PTRDIFF_TYPE__ long int
@@ -1387,11 +1383,6 @@
 // SPARCV9:#define __SIZEOF_POINTER__ 8
 // SPARCV9:#define __UINTPTR_TYPE__ long unsigned int
 //
-// Check that clang defines __NO_INLINE__ unconditionally (even at -O) to
-// work around Issue #47994.
-// RUN: %clang_cc1 -E -dM -triple=sparc64-unknown-linux-gnu -O < /dev/null | FileCheck -match-full-lines -check-prefix SPARC64-LINUX %s
-// SPARC64-LINUX:#define __NO_INLINE__ 1
-//
 // RUN: %clang_cc1 -E -dM -ffreestanding -triple=sparc64-none-openbsd < /dev/null | FileCheck -match-full-lines -check-prefix SPARC64-OBSD %s
 // SPARC64-OBSD:#define __INT64_TYPE__ long long int
 // SPARC64-OBSD:#define __INTMAX_C_SUFFIX__ LL