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[dev.typeparams] cmd/compile: add ir.TypeNodeAt

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This CL adds a variant of ir.TypeNode that allows specifying position
information. This shouldn't normally be needed/used, but it's
occasionally helpful for writing code that passes toolstash -cmp.

Change-Id: I2be5da0339fd1ec2bee01d6c5310bd2ef58c46b4
Reviewed-on: https://go-review.googlesource.com/c/go/+/327049
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
This commit is contained in:
Matthew Dempsky 2021-06-11 01:10:10 -07:00
parent b20747334a
commit 18788245ea
1 changed files with 12 additions and 1 deletions
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13
src/cmd/compile/internal/ir/type.go
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@ -300,11 +300,22 @@ func (n *typeNode) CanBeNtype() {}
// TypeNode returns the Node representing the type t.
func TypeNode(t *types.Type) Ntype {
return TypeNodeAt(src.NoXPos, t)
}
// TypeNodeAt is like TypeNode, but allows specifying the position
// information if a new OTYPE needs to be constructed.
//
// Deprecated: Use TypeNode instead. For typical use, the position for
// an anonymous OTYPE node should not matter. However, TypeNodeAt is
// available for use with toolstash -cmp to refactor existing code
// that is sensitive to OTYPE position.
func TypeNodeAt(pos src.XPos, t *types.Type) Ntype {
if n := t.Obj(); n != nil {
if n.Type() != t {
base.Fatalf("type skew: %v has type %v, but expected %v", n, n.Type(), t)
}
return n.(Ntype)
}
return newTypeNode(src.NoXPos, t)
return newTypeNode(pos, t)
}