1 files changed, 10 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86RegisterInfo.cpp b/llvm/lib/Target/X86/X86RegisterInfo.cpp
index 1b2fece6052..6324bd4a954 100644
--- a/llvm/lib/Target/X86/X86RegisterInfo.cpp
+++ b/llvm/lib/Target/X86/X86RegisterInfo.cpp
@@ -691,3 +691,13 @@ X86RegisterInfo::getPtrSizedFrameRegister(const MachineFunction &MF) const {
     FrameReg = getX86SubSuperRegister(FrameReg, 32);
   return FrameReg;
 }
+
+unsigned llvm::get512BitSuperRegister(unsigned Reg) {
+  if (Reg >= X86::XMM0 && Reg <= X86::XMM31)
+    return X86::ZMM0 + (Reg - X86::XMM0);
+  if (Reg >= X86::YMM0 && Reg <= X86::YMM31)
+    return X86::ZMM0 + (Reg - X86::YMM0);
+  if (Reg >= X86::ZMM0 && Reg <= X86::ZMM31)
+    return Reg;
+  llvm_unreachable("Unexpected SIMD register");
+}