vendor/llvm-project/llvmorg-10-init-17466-ge26a78e7085

1 files changed, 13 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/TargetFrameLoweringImpl.cpp b/llvm/lib/CodeGen/TargetFrameLoweringImpl.cpp
index 9eeacc2584cb..bc59be890c97 100644
--- a/llvm/lib/CodeGen/TargetFrameLoweringImpl.cpp
+++ b/llvm/lib/CodeGen/TargetFrameLoweringImpl.cpp
@@ -60,6 +60,19 @@ bool TargetFrameLowering::needsFrameIndexResolution(
   return MF.getFrameInfo().hasStackObjects();
 }
 
+void TargetFrameLowering::getCalleeSaves(const MachineFunction &MF,
+                                         BitVector &CalleeSaves) const {
+  const TargetRegisterInfo &TRI = *MF.getSubtarget().getRegisterInfo();
+  CalleeSaves.resize(TRI.getNumRegs());
+
+  const MachineFrameInfo &MFI = MF.getFrameInfo();
+  if (!MFI.isCalleeSavedInfoValid())
+    return;
+
+  for (const CalleeSavedInfo &Info : MFI.getCalleeSavedInfo())
+    CalleeSaves.set(Info.getReg());
+}
+
 void TargetFrameLowering::determineCalleeSaves(MachineFunction &MF,
                                                BitVector &SavedRegs,
                                                RegScavenger *RS) const {