[PATCH] D51474: Consider CSRs in computeRegisterLiveness

[Francis Visoiu Mistrih via Phabricator via llvm-commits]

thegameg added inline comments.


================
Comment at: lib/CodeGen/MachineBasicBlock.cpp:1406
+    const MachineFrameInfo &MFI = MF.getFrameInfo();
+    if (isReturnBlock() && MFI.isCalleeSavedInfoValid()) {
+      const MachineRegisterInfo &MRI = MF.getRegInfo();
----------------
I wonder if this shouldn't be checking `MFI.getRestoreBlock()` instead/along with `isReturnBlock()`. IIUC CSRs are live after the epilogue, so I assume checking for `isReturnBlock()` is always safer.


https://reviews.llvm.org/D51474