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cmd/compile: remove broken inlining accounting code
We can't currently inline functions that contain closures anyway, so just delete this budgeting code for now. Re-enable once we can (if ever) inline functions with nested closures. Updates #15561. Fixes #23093. Change-Id: Idc5f8e042ccfcc8921022e58d3843719d4ab821e Reviewed-on: https://go-review.googlesource.com/83538 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Robert Griesemer <gri@golang.org>
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@ -283,33 +283,14 @@ func (v *hairyVisitor) visit(n *Node) bool {
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v.budget -= fn.InlCost
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break
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}
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if n.Left.Op == OCLOSURE {
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if fn := inlinableClosure(n.Left); fn != nil {
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v.budget -= fn.Func.InlCost
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break
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}
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} else if n.Left.Op == ONAME && n.Left.Name != nil && n.Left.Name.Defn != nil {
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// NB: this case currently cannot trigger since closure definition
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// prevents inlining
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// NB: ideally we would also handle captured variables defined as
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// closures in the outer scope this brings us back to the idea of
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// function value propagation, which if available would both avoid
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// the "reassigned" check and neatly handle multiple use cases in a
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// single code path
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if d := n.Left.Name.Defn; d.Op == OAS && d.Right.Op == OCLOSURE {
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if fn := inlinableClosure(d.Right); fn != nil {
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v.budget -= fn.Func.InlCost
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break
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}
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}
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}
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if n.Left.isMethodExpression() {
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if d := asNode(n.Left.Sym.Def); d != nil && d.Func.Inl.Len() != 0 {
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v.budget -= d.Func.InlCost
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break
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}
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}
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// TODO(mdempsky): Budget for OCLOSURE calls if we
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// ever allow that. See #15561 and #23093.
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if Debug['l'] < 4 {
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v.reason = "non-leaf function"
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return true
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9
test/fixedbugs/issue23093.go
Normal file
9
test/fixedbugs/issue23093.go
Normal file
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@ -0,0 +1,9 @@
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// errorcheck
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// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package p
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var f = func() { f() } // ERROR "initialization loop"
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