First step towards more human-friendly PPC assembler output:
- add -ppc-reg-with-percent-prefix option to use %r3 etc as register
  names
- split off logic for Darwinish verbose conditional codes into a helper
  function
- be explicit about Darwin vs AIX vs GNUish assembler flavors

Based on the patch from Alexandre Yukio Yamashita

Differential Revision: https://reviews.llvm.org/D39016

llvm-svn: 319381
diff --git a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp
index 7044835..a1e4e07 100644
--- a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp
+++ b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp
@@ -239,7 +239,7 @@
                                              const MCAsmInfo &MAI,
                                              const MCInstrInfo &MII,
                                              const MCRegisterInfo &MRI) {
-  return new PPCInstPrinter(MAI, MII, MRI, T.isOSDarwin());
+  return new PPCInstPrinter(MAI, MII, MRI, T);
 }
 
 extern "C" void LLVMInitializePowerPCTargetMC() {