[X86Subtarget] Use isPositionIndependent(). NFC.

Differential Revision:  http://reviews.llvm.org/D21480

llvm-svn: 273071
diff --git a/llvm/lib/Target/X86/X86Subtarget.cpp b/llvm/lib/Target/X86/X86Subtarget.cpp
index 99adf9c..a155070 100644
--- a/llvm/lib/Target/X86/X86Subtarget.cpp
+++ b/llvm/lib/Target/X86/X86Subtarget.cpp
@@ -66,7 +66,7 @@
 
   // If this is for a position dependent executable, the static linker can
   // figure it out.
-  if (TM.getRelocationModel() != Reloc::PIC_)
+  if (!isPositionIndependent())
     return X86II::MO_NO_FLAG;
 
   // The COFF dynamic linker just patches the executable sections.
@@ -104,7 +104,7 @@
     return X86II::MO_GOTPCREL;
 
   if (isTargetDarwin()) {
-    if (RM != Reloc::PIC_)
+    if (!isPositionIndependent())
       return X86II::MO_DARWIN_NONLAZY;
     return X86II::MO_DARWIN_NONLAZY_PIC_BASE;
   }
@@ -334,7 +334,7 @@
   } else if (isTargetCOFF()) {
     setPICStyle(PICStyles::None);
   } else if (isTargetDarwin()) {
-    if (TM.getRelocationModel() == Reloc::PIC_)
+    if (isPositionIndependent())
       setPICStyle(PICStyles::StubPIC);
     else {
       assert(TM.getRelocationModel() == Reloc::DynamicNoPIC);