[SPARC] [SSP] Add support for LOAD_STACK_GUARD.

This fixes PR22248 on sparc.

Differential Revision: http://reviews.llvm.org/D19386

llvm-svn: 267545

1 files changed, 13 insertions, 0 deletions

diff --git a/llvm/lib/Target/Sparc/SparcISelLowering.cpp b/llvm/lib/Target/Sparc/SparcISelLowering.cpp
index 527d052258d..7a1e7538ba0 100644
--- a/llvm/lib/Target/Sparc/SparcISelLowering.cpp
+++ b/llvm/lib/Target/Sparc/SparcISelLowering.cpp
@@ -3302,3 +3302,16 @@ void SparcTargetLowering::ReplaceNodeResults(SDNode *N,
   }
   }
 }
+
+// Override to enable LOAD_STACK_GUARD lowering on Linux.
+bool SparcTargetLowering::useLoadStackGuardNode() const {
+  if (!Subtarget->isTargetLinux())
+    return TargetLowering::useLoadStackGuardNode();
+  return true;
+}
+
+// Override to disable global variable loading on Linux.
+void SparcTargetLowering::insertSSPDeclarations(Module &M) const {
+  if (!Subtarget->isTargetLinux())
+    return TargetLowering::insertSSPDeclarations(M);
+}