[PowerPC] Improve consistency in use of __ppc__, __powerpc__, etc.

Both GCC and LLVM will implicitly define __ppc__ and __powerpc__ for
all PowerPC targets, whether 32- or 64-bit.  They will both implicitly
define __ppc64__ and __powerpc64__ for 64-bit PowerPC targets, and not
for 32-bit targets.  We cannot be sure that all other possible
compilers used to compile Clang/LLVM define both __ppc__ and
__powerpc__, for example, so it is best to check for both when relying
on either inside the Clang/LLVM code base.

This patch makes sure we always check for both variants.  In addition,
it fixes one unnecessary check in lib/Target/PowerPC/PPCJITInfo.cpp.
(At least one of __ppc__ and __powerpc__ should always be defined when
compiling for a PowerPC target, no matter which compiler is used, so
testing for them is unnecessary.)

There are some places in the compiler that check for other variants,
like __POWERPC__ and _POWER, and I have left those in place.  There is
no need to add them elsewhere.  This seems to be in Apple-specific
code, and I won't take a chance on breaking it.

There is no intended change in behavior; thus, no test cases are
added.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187248 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 3 deletions

diff --git a/lib/Target/PowerPC/PPCJITInfo.cpp b/lib/Target/PowerPC/PPCJITInfo.cpp
index 18f4adf839..71c8f1db1c 100644
--- a/lib/Target/PowerPC/PPCJITInfo.cpp
+++ b/lib/Target/PowerPC/PPCJITInfo.cpp
@@ -71,7 +71,7 @@ static void EmitBranchToAt(uint64_t At, uint64_t To, bool isCall, bool is64Bit){
 extern "C" void PPC32CompilationCallback();
 extern "C" void PPC64CompilationCallback();
 
-#if (!defined(__ppc__) && !defined(__powerpc__)) || defined(__powerpc64__) || defined(__ppc64__)
+#if defined(__powerpc64__) || defined(__ppc64__)
 void PPC32CompilationCallback() {
   llvm_unreachable("This is not a 32bit PowerPC, you can't execute this!");
 }
@@ -356,8 +356,8 @@ TargetJITInfo::StubLayout PPCJITInfo::getStubLayout() {
   return Result;
 }
 
-#if (defined(__POWERPC__) || defined (__ppc__) || defined(_POWER)) && \
-defined(__APPLE__)
+#if (defined(__POWERPC__) || defined (__ppc__) || defined(__powerpc__) || \
+defined(_POWER)) && defined(__APPLE__)
 extern "C" void sys_icache_invalidate(const void *Addr, size_t len);
 #endif