1 files changed, 16 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86RegisterInfo.cpp b/llvm/lib/Target/X86/X86RegisterInfo.cpp
index 50fb0917272..65e847e0dbb 100644
--- a/llvm/lib/Target/X86/X86RegisterInfo.cpp
+++ b/llvm/lib/Target/X86/X86RegisterInfo.cpp
@@ -31,6 +31,7 @@
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Target/TargetOptions.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/STLExtras.h"
 using namespace llvm;
 
@@ -883,6 +884,21 @@ X86RegisterInfo::getCalleeSavedRegClasses() const {
   return Is64Bit ? CalleeSavedRegClasses64Bit : CalleeSavedRegClasses32Bit;
 }
 
+BitVector X86RegisterInfo::getReservedRegs(const MachineFunction &MF) const {
+  BitVector Reserved(getNumRegs());
+  Reserved.set(X86::RSP);
+  Reserved.set(X86::ESP);
+  Reserved.set(X86::SP);
+  Reserved.set(X86::SPL);
+  if (hasFP(MF)) {
+    Reserved.set(X86::RBP);
+    Reserved.set(X86::EBP);
+    Reserved.set(X86::BP);
+    Reserved.set(X86::BPL);
+  }
+  return Reserved;
+}
+
 //===----------------------------------------------------------------------===//
 // Stack Frame Processing methods
 //===----------------------------------------------------------------------===//