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cmd/compile: disable inlining functions with closures for now

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Added a flag '-d=inlfuncswithclosures=1' to allow inlining functions with
closures, and change the default to off for now, until #44370 is fixed.

Updates #44370.

Change-Id: Ic17723aa5c091d91f5f5004d8b63ec7125257acf
Reviewed-on: https://go-review.googlesource.com/c/go/+/296049
Run-TryBot: Dan Scales <danscales@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Dan Scales <danscales@google.com>
This commit is contained in:
Dan Scales 2021-02-24 13:03:17 -08:00
parent 6c3f8a2f47
commit 8027343b63
4 changed files with 31 additions and 30 deletions
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1
src/cmd/compile/internal/base/debug.go
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@ -40,6 +40,7 @@ type DebugFlags struct {
Export int `help:"print export data"` Export int `help:"print export data"`
Fieldtrack *int `help:"enable field tracking"` Fieldtrack *int `help:"enable field tracking"`
GCProg int `help:"print dump of GC programs"` GCProg int `help:"print dump of GC programs"`
InlFuncsWithClosures int `help:"allow functions with closures to be inlined"`
Libfuzzer int `help:"enable coverage instrumentation for libfuzzer"` Libfuzzer int `help:"enable coverage instrumentation for libfuzzer"`
LocationLists int `help:"print information about DWARF location list creation"` LocationLists int `help:"print information about DWARF location list creation"`
Nil int `help:"print information about nil checks"` Nil int `help:"print information about nil checks"`

12
src/cmd/compile/internal/inline/inl.go
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@ -354,15 +354,15 @@ func (v *hairyVisitor) doNode(n ir.Node) bool {
return true return true
case ir.OCLOSURE: case ir.OCLOSURE:
// TODO(danscales,mdempsky): Get working with -G. if base.Debug.InlFuncsWithClosures == 0 {
// Probably after #43818 is fixed. // TODO(danscales): change default of InlFuncsWithClosures
if base.Flag.G > 0 { // to 1 when #44370 is fixed
v.reason = "inlining closures not yet working with -G" v.reason = "not inlining functions with closures"
return true return true
} }
// TODO(danscales) - fix some bugs when budget is lowered below 15 // TODO(danscales): Maybe make budget proportional to number of closure
// Maybe make budget proportional to number of closure variables, e.g.: // variables, e.g.:
//v.budget -= int32(len(n.(*ir.ClosureExpr).Func.ClosureVars) * 3) //v.budget -= int32(len(n.(*ir.ClosureExpr).Func.ClosureVars) * 3)
v.budget -= 15 v.budget -= 15
// Scan body of closure (which DoChildren doesn't automatically // Scan body of closure (which DoChildren doesn't automatically

2
test/closure3.go
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@ -1,4 +1,4 @@
// errorcheckandrundir -0 -m // errorcheckandrundir -0 -m -d=inlfuncswithclosures=1
// Copyright 2017 The Go Authors. All rights reserved. // Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style // Use of this source code is governed by a BSD-style

2
test/inline.go
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@ -1,4 +1,4 @@
// errorcheck -0 -m // errorcheck -0 -m -d=inlfuncswithclosures=1
// Copyright 2015 The Go Authors. All rights reserved. // Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style // Use of this source code is governed by a BSD-style