[llvm] r325988 - bpf: Support 32-bit subregister in various InstrInfo hooks

[Yonghong Song via llvm-commits]

Author: yhs
Date: Fri Feb 23 15:49:29 2018
New Revision: 325988

URL: http://llvm.org/viewvc/llvm-project?rev=325988&view=rev
Log:
bpf: Support 32-bit subregister in various InstrInfo hooks

This patch support 32-bit subregister in three InstrInfo hooks, i.e.
copyPhysReg, loadRegFromStackSlot and storeRegToStackSlot,

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

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

Modified: llvm/trunk/lib/Target/BPF/BPFInstrInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/BPF/BPFInstrInfo.cpp?rev=325988&r1=325987&r2=325988&view=diff
==============================================================================
--- llvm/trunk/lib/Target/BPF/BPFInstrInfo.cpp (original)
+++ llvm/trunk/lib/Target/BPF/BPFInstrInfo.cpp Fri Feb 23 15:49:29 2018
@@ -36,6 +36,9 @@ void BPFInstrInfo::copyPhysReg(MachineBa
   if (BPF::GPRRegClass.contains(DestReg, SrcReg))
     BuildMI(MBB, I, DL, get(BPF::MOV_rr), DestReg)
         .addReg(SrcReg, getKillRegState(KillSrc));
+  else if (BPF::GPR32RegClass.contains(DestReg, SrcReg))
+    BuildMI(MBB, I, DL, get(BPF::MOV_rr_32), DestReg)
+        .addReg(SrcReg, getKillRegState(KillSrc));
   else
     llvm_unreachable("Impossible reg-to-reg copy");
 }
@@ -54,6 +57,11 @@ void BPFInstrInfo::storeRegToStackSlot(M
         .addReg(SrcReg, getKillRegState(IsKill))
         .addFrameIndex(FI)
         .addImm(0);
+  else if (RC == &BPF::GPR32RegClass)
+    BuildMI(MBB, I, DL, get(BPF::STW32))
+        .addReg(SrcReg, getKillRegState(IsKill))
+        .addFrameIndex(FI)
+        .addImm(0);
   else
     llvm_unreachable("Can't store this register to stack slot");
 }
@@ -69,6 +77,8 @@ void BPFInstrInfo::loadRegFromStackSlot(
 
   if (RC == &BPF::GPRRegClass)
     BuildMI(MBB, I, DL, get(BPF::LDD), DestReg).addFrameIndex(FI).addImm(0);
+  else if (RC == &BPF::GPR32RegClass)
+    BuildMI(MBB, I, DL, get(BPF::LDW32), DestReg).addFrameIndex(FI).addImm(0);
   else
     llvm_unreachable("Can't load this register from stack slot");
 }