Use the cached subtargets and remove calls to getSubtarget/getSubtargetImpl
without a Function argument.

llvm-svn: 227622
diff --git a/llvm/lib/Target/PowerPC/PPCSubtarget.cpp b/llvm/lib/Target/PowerPC/PPCSubtarget.cpp
index c753e68..9aaf3ab 100644
--- a/llvm/lib/Target/PowerPC/PPCSubtarget.cpp
+++ b/llvm/lib/Target/PowerPC/PPCSubtarget.cpp
@@ -51,7 +51,7 @@
               TargetTriple.getArch() == Triple::ppc64le),
       TargetABI(PPC_ABI_UNKNOWN),
       FrameLowering(initializeSubtargetDependencies(CPU, FS)), InstrInfo(*this),
-      TLInfo(TM), TSInfo(TM.getDataLayout()) {}
+      TLInfo(TM, *this), TSInfo(TM.getDataLayout()) {}
 
 void PPCSubtarget::initializeEnvironment() {
   StackAlignment = 16;