[GlobalISel] Add Legalized MachineFunction property.

Legalized: The MachineLegalizer ran; all pre-isel generic instructions
have been legalized, i.e., all instructions are now one of:
  - generic and always legal (e.g., COPY)
  - target-specific
  - legal pre-isel generic instructions.

This lets us enforce certain invariants across passes.
This property is GlobalISel-specific, but is always available.

llvm-svn: 277470

1 files changed, 3 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/MachineFunction.cpp b/llvm/lib/CodeGen/MachineFunction.cpp
index a4c4ea4bb95..202cf3cdf03 100644
--- a/llvm/lib/CodeGen/MachineFunction.cpp
+++ b/llvm/lib/CodeGen/MachineFunction.cpp
@@ -76,6 +76,9 @@ void MachineFunctionProperties::print(raw_ostream &ROS, bool OnlySet) const {
       case Property::AllVRegsAllocated:
         ROS << (HasProperty ? "AllVRegsAllocated" : "HasVRegs");
         break;
+      case Property::Legalized:
+        ROS << (HasProperty ? "" : "not ") << "legalized";
+        break;
       default:
         break;
     }