GlobalISel: add a G_PHI instruction to give phis a type.

They're another source of generic vregs, which are going to need a type on the
definition when we remove the register width from MachineRegisterInfo.

llvm-svn: 280412

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/Target/AArch64/AArch64InstructionSelector.cpp b/llvm/lib/Target/AArch64/AArch64InstructionSelector.cpp
index 779b624b0f7..26342a19546 100644
--- a/llvm/lib/Target/AArch64/AArch64InstructionSelector.cpp
+++ b/llvm/lib/Target/AArch64/AArch64InstructionSelector.cpp
@@ -235,6 +235,12 @@ bool AArch64InstructionSelector::select(MachineInstr &I) const {
     return true;
   }
 
+   case TargetOpcode::G_PHI: {
+     I.setDesc(TII.get(TargetOpcode::PHI));
+     I.removeTypes();
+     return true;
+   }
+
   case TargetOpcode::G_FRAME_INDEX: {
     // allocas and G_FRAME_INDEX are only supported in addrspace(0).
     if (I.getType() != LLT::pointer(0)) {