[llvm] r325979 - bpf: Use markSuperRegs to mark reserved registers

[Yonghong Song via llvm-commits]

Author: yhs
Date: Fri Feb 23 15:49:18 2018
New Revision: 325979

URL: http://llvm.org/viewvc/llvm-project?rev=325979&view=rev
Log:
bpf: Use markSuperRegs to mark reserved registers

markSuperRegs is the canonical helper function used to mark reserved
registers. It could mark any overlapping sub-registers automatically.

Reviewed-by: Yonghong Song <yhs at fb.com>
Signed-off-by: Jiong Wang <jiong.wang at netronome.com>

Modified:
    llvm/trunk/lib/Target/BPF/BPFRegisterInfo.cpp

Modified: llvm/trunk/lib/Target/BPF/BPFRegisterInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/BPF/BPFRegisterInfo.cpp?rev=325979&r1=325978&r2=325979&view=diff
==============================================================================
--- llvm/trunk/lib/Target/BPF/BPFRegisterInfo.cpp (original)
+++ llvm/trunk/lib/Target/BPF/BPFRegisterInfo.cpp Fri Feb 23 15:49:18 2018
@@ -37,8 +37,8 @@ BPFRegisterInfo::getCalleeSavedRegs(cons
 
 BitVector BPFRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
   BitVector Reserved(getNumRegs());
-  Reserved.set(BPF::R10); // R10 is read only frame pointer
-  Reserved.set(BPF::R11); // R11 is pseudo stack pointer
+  markSuperRegs(Reserved, BPF::W10); // [W|R]10 is read only frame pointer
+  markSuperRegs(Reserved, BPF::W11); // [W|R]11 is pseudo stack pointer
   return Reserved;
 }