[SystemZ] Implement getRepRegClassFor()
This method must return a valid register class, or the list-ilp isel
scheduler will crash. For MVT::Untyped nullptr was previously returned, but
now ADDR128BitRegClass is returned instead. This is needed just as long as
list-ilp (and probably also list-hybrid) is still there.
Review: Ulrich Weigand, A Trick
https://reviews.llvm.org/D32802
llvm-svn: 302649
diff --git a/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp b/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
index ac736c2..235e095 100644
--- a/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
@@ -6352,3 +6352,12 @@
llvm_unreachable("Unexpected instr type to insert");
}
}
+
+// This is only used by the isel schedulers, and is needed only to prevent
+// compiler from crashing when list-ilp is used.
+const TargetRegisterClass *
+SystemZTargetLowering::getRepRegClassFor(MVT VT) const {
+ if (VT == MVT::Untyped)
+ return &SystemZ::ADDR128BitRegClass;
+ return TargetLowering::getRepRegClassFor(VT);
+}
diff --git a/llvm/lib/Target/SystemZ/SystemZISelLowering.h b/llvm/lib/Target/SystemZ/SystemZISelLowering.h
index 1c34dc4..79c8c4d 100644
--- a/llvm/lib/Target/SystemZ/SystemZISelLowering.h
+++ b/llvm/lib/Target/SystemZ/SystemZISelLowering.h
@@ -590,6 +590,8 @@
MachineBasicBlock *emitLoadAndTestCmp0(MachineInstr &MI,
MachineBasicBlock *MBB,
unsigned Opcode) const;
+
+ const TargetRegisterClass *getRepRegClassFor(MVT VT) const override;
};
} // end namespace llvm