diff --git a/lib/Support/Unix/Memory.inc b/lib/Support/Unix/Memory.inc
index 58fda420eb6..73f586ff4a8 100644
--- a/lib/Support/Unix/Memory.inc
+++ b/lib/Support/Unix/Memory.inc
@@ -310,14 +310,14 @@ void Memory::InvalidateInstructionCache(const void *Addr,
 // icache invalidation for PPC and ARM.
 #if defined(__APPLE__)
 
-#  if (defined(__POWERPC__) || defined (__ppc__) || \
+#  if (defined(__POWERPC__) || defined (__ppc__) || defined (__powerpc__) \
      defined(_POWER) || defined(_ARCH_PPC)) || defined(__arm__)
   sys_icache_invalidate(const_cast<void *>(Addr), Len);
 #  endif
 
 #else
 
-#  if (defined(__POWERPC__) || defined (__ppc__) || \
+#  if (defined(__POWERPC__) || defined (__ppc__) || defined (__powerpc__) || \
        defined(_POWER) || defined(_ARCH_PPC)) && defined(__GNUC__)
   const size_t LineSize = 32;
 
diff --git a/lib/Target/PowerPC/PPCJITInfo.cpp b/lib/Target/PowerPC/PPCJITInfo.cpp
index 18f4adf839e..71c8f1db1c7 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
 
diff --git a/unittests/ADT/BitVectorTest.cpp b/unittests/ADT/BitVectorTest.cpp
index d7cde891fb5..4d3223e418d 100644
--- a/unittests/ADT/BitVectorTest.cpp
+++ b/unittests/ADT/BitVectorTest.cpp
@@ -8,7 +8,7 @@
 //===----------------------------------------------------------------------===//
 
 // Some of these tests fail on PowerPC for unknown reasons.
-#ifndef __ppc__
+#if !defined(__ppc__) && !defined(__powerpc__)
 
 #include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/SmallBitVector.h"
diff --git a/unittests/ADT/PackedVectorTest.cpp b/unittests/ADT/PackedVectorTest.cpp
index 55b5d8d049d..b6a7e583012 100644
--- a/unittests/ADT/PackedVectorTest.cpp
+++ b/unittests/ADT/PackedVectorTest.cpp
@@ -9,7 +9,7 @@
 
 // BitVectorTest tests fail on PowerPC for unknown reasons, so disable this
 // as well since it depends on a BitVector.
-#ifndef __ppc__
+#if !defined(__ppc__) && !defined(__powerpc__)
 
 #include "llvm/ADT/PackedVector.h"
 #include "gtest/gtest.h"
diff --git a/unittests/ExecutionEngine/JIT/MultiJITTest.cpp b/unittests/ExecutionEngine/JIT/MultiJITTest.cpp
index 4018cd5ce2f..29689b71a24 100644
--- a/unittests/ExecutionEngine/JIT/MultiJITTest.cpp
+++ b/unittests/ExecutionEngine/JIT/MultiJITTest.cpp
@@ -21,7 +21,8 @@ using namespace llvm;
 namespace {
 
 // ARM, PowerPC and SystemZ tests disabled pending fix for PR10783.
-#if !defined(__arm__) && !defined(__powerpc__) && !defined(__s390__)
+#if !defined(__arm__) && !defined(__powerpc__) && !defined(__s390__) && \
+  !defined(__ppc__)
 
 bool LoadAssemblyInto(Module *M, const char *assembly) {
   SMDiagnostic Error;