Implement 'large' PIC model

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76006 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 19 insertions, 0 deletions

diff --git a/lib/Target/SystemZ/SystemZSubtarget.cpp b/lib/Target/SystemZ/SystemZSubtarget.cpp
index 9c3262e722..18a8e1633d 100644
--- a/lib/Target/SystemZ/SystemZSubtarget.cpp
+++ b/lib/Target/SystemZ/SystemZSubtarget.cpp
@@ -14,6 +14,7 @@
 #include "SystemZSubtarget.h"
 #include "SystemZ.h"
 #include "SystemZGenSubtarget.inc"
+#include "llvm/GlobalValue.h"
 #include "llvm/Target/TargetMachine.h"
 
 using namespace llvm;
@@ -26,3 +27,21 @@ SystemZSubtarget::SystemZSubtarget(const TargetMachine &TM, const Module &M,
   // Parse features string.
   ParseSubtargetFeatures(FS, CPU);
 }
+
+/// True if accessing the GV requires an extra load.
+bool SystemZSubtarget::GVRequiresExtraLoad(const GlobalValue* GV,
+                                           const TargetMachine& TM,
+                                           bool isDirectCall) const {
+  if (TM.getRelocationModel() == Reloc::PIC_) {
+    // Extra load is needed for all externally visible.
+    if (isDirectCall)
+      return false;
+
+    if (GV->hasLocalLinkage() || GV->hasHiddenVisibility())
+      return false;
+
+    return true;
+  }
+
+  return false;
+}