[llvm-dev] Unknown Target Node

[Josh Sharp via llvm-dev]

Craig was correct. The problem was that one of my target specific ISD opcodes wasn't handledin my *TargetLowering::getTargetNodeName method.
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From: Josh Sharp
Sent: Saturday, March 2, 2019 11:45 AM
To: via llvm-dev
Subject: Unknown Target Node

Hi,

I'm having an error I've never seen before

LLVM ERROR: Cannot select: t20: ch,glue = <<Unknown Target Node #284>> t11, TargetGlobalAddress:i32<i32 (i32, i32)* @add2> 0, Register:i32 $r4, Register:i32 $r5, RegisterMask:Untyped, t18:1

The IR is

define i32 @add2(i32 %a, i32 %b) {
entry:
  %tmp1 = icmp eq i32 %a, 0
  br i1 %tmp1, label %done, label %recurse
recurse:
  %tmp2 = sub i32 %a, 1
  %tmp3 = add i32 %b, 1
  %tmp4 = call i32 @add2(i32 %tmp2, i32 %tmp3)
  ret i32 %tmp4
done:
  ret i32 %b
}

I don't know what the error means but it goes away if I remove the line "%tmp4 = call i32 @add2(i32 %tmp2, i32 %tmp3)"

Any help would be appreciated.
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