Revert "cmd/compile: cleanup toolstash hacks from previous CL"

This partially reverts commit 01bf5cc.

For unknown reasons, this CL was causing an internal test to allocate
1.2GB when it used to allocate less than 300MB.

Change-Id: I41d767781e0ae9e43bf670e2a186ee074821eca4
Reviewed-on: https://go-review.googlesource.com/31674
Reviewed-by: Matthew Dempsky <[email protected]>
Run-TryBot: Joe Tsai <[email protected]>
TryBot-Result: Gobot Gobot <[email protected]>

Author: dsnet

src/cmd/compile/internal/gc/inl.go

@@ -248,6 +248,10 @@ func ishairy(n *Node, budget *int32, reason *string) bool {
 	}
 
 	(*budget)--
+	// TODO(mdempsky): Hack to appease toolstash; remove.
+	if n.Op == OSTRUCTKEY {
+		(*budget)--
+	}
 
 	return *budget < 0 || ishairy(n.Left, budget, reason) || ishairy(n.Right, budget, reason) ||
 		ishairylist(n.List, budget, reason) || ishairylist(n.Rlist, budget, reason) ||