Add "Restored" flag to CalleeSavedInfo

The liveness-tracking code assumes that the registers that were saved
in the function's prolog are live outside of the function. Specifically,
that registers that were saved are also live-on-exit from the function.
This isn't always the case as illustrated by the LR register on ARM.

Differential Revision: https://reviews.llvm.org/D36160

llvm-svn: 310619

2 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/Target/AVR/AVRFrameLowering.cpp b/llvm/lib/Target/AVR/AVRFrameLowering.cpp
index 0ec8e8b08ce..5101cf586f1 100644
--- a/llvm/lib/Target/AVR/AVRFrameLowering.cpp
+++ b/llvm/lib/Target/AVR/AVRFrameLowering.cpp
@@ -275,7 +275,7 @@ bool AVRFrameLowering::spillCalleeSavedRegisters(
 
 bool AVRFrameLowering::restoreCalleeSavedRegisters(
     MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
-    const std::vector<CalleeSavedInfo> &CSI,
+    std::vector<CalleeSavedInfo> &CSI,
     const TargetRegisterInfo *TRI) const {
   if (CSI.empty()) {
     return false;
diff --git a/llvm/lib/Target/AVR/AVRFrameLowering.h b/llvm/lib/Target/AVR/AVRFrameLowering.h
index 850a43abebf..30ef441183a 100644
--- a/llvm/lib/Target/AVR/AVRFrameLowering.h
+++ b/llvm/lib/Target/AVR/AVRFrameLowering.h
@@ -30,7 +30,7 @@ public:
   bool
   restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
                               MachineBasicBlock::iterator MI,
-                              const std::vector<CalleeSavedInfo> &CSI,
+                              std::vector<CalleeSavedInfo> &CSI,
                               const TargetRegisterInfo *TRI) const override;
   bool hasReservedCallFrame(const MachineFunction &MF) const override;
   bool canSimplifyCallFramePseudos(const MachineFunction &MF) const override;