Imported Upstream version 5.18.0.225

Former-commit-id: 10196d987d5fc5564b9d3b33b1fdf13190f4d0b5

external/llvm/lib/Target/X86/X86MachineFunctionInfo.cpp

@@ -0,0 +1,31 @@
+//===-- X86MachineFunctionInfo.cpp - X86 machine function info ------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "X86MachineFunctionInfo.h"
+#include "X86RegisterInfo.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/CodeGen/TargetSubtargetInfo.h"
+
+using namespace llvm;
+
+void X86MachineFunctionInfo::anchor() { }
+
+void X86MachineFunctionInfo::setRestoreBasePointer(const MachineFunction *MF) {
+  if (!RestoreBasePointerOffset) {
+    const X86RegisterInfo *RegInfo = static_cast<const X86RegisterInfo *>(
+      MF->getSubtarget().getRegisterInfo());
+    unsigned SlotSize = RegInfo->getSlotSize();
+    for (const MCPhysReg *CSR = MF->getRegInfo().getCalleeSavedRegs();
+         unsigned Reg = *CSR; ++CSR) {
+      if (X86::GR64RegClass.contains(Reg) || X86::GR32RegClass.contains(Reg))
+        RestoreBasePointerOffset -= SlotSize;
+    }
+  }
+}
+