[GlobalISel] Don't RegBankSelect target-specific instructions.

They don't have types and should be using register classes.

llvm-svn: 277447

1 files changed, 7 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/GlobalISel/RegBankSelect.cpp b/llvm/lib/CodeGen/GlobalISel/RegBankSelect.cpp
index 521bb795682..6248ab46097 100644
--- a/llvm/lib/CodeGen/GlobalISel/RegBankSelect.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/RegBankSelect.cpp
@@ -554,7 +554,13 @@ bool RegBankSelect::runOnMachineFunction(MachineFunction &MF) {
          MII != End;) {
       // MI might be invalidated by the assignment, so move the
       // iterator before hand.
-      assignInstr(*MII++);
+      MachineInstr &MI = *MII++;
+
+      // Ignore target-specific instructions: they should use proper regclasses.
+      if (isTargetSpecificOpcode(MI.getOpcode()))
+        continue;
+
+      assignInstr(MI);
     }
   }
   OptMode = SaveOptMode;