llvm-gcc sometimes marks external declarations hidden, because intializers are
processed separately. Honour such situation and emit PIC relocations properly
in such case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53091 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86Subtarget.cpp b/lib/Target/X86/X86Subtarget.cpp
index b4c5849..fa630ed 100644
--- a/lib/Target/X86/X86Subtarget.cpp
+++ b/lib/Target/X86/X86Subtarget.cpp
@@ -47,7 +47,8 @@
       // Extra load is needed for all externally visible.
       if (isDirectCall)
         return false;
-      if (GV->hasInternalLinkage() || GV->hasHiddenVisibility())
+      if (GV->hasInternalLinkage() ||
+          (GV->hasHiddenVisibility() && !GV->isDeclaration()))
         return false;
       return true;
     } else if (isTargetCygMing() || isTargetWindows()) {