go/test/fixedbugs/issue19699b.go

// errorcheck

// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package p

func f() bool {
	if false {
	} else {
		return true
	}
} // ERROR "missing return( at end of function)?"
cmd/compile: eliminate dead code in if statements after typechecking This is a more thorough and cleaner fix than doing dead code elimination separately during inlining, escape analysis, and export. Unfortunately, it does add another full walk of the AST. The performance impact is very small, but not non-zero. If a label or goto is present in the dead code, it is not eliminated. This restriction can be removed once label/goto checking occurs much earlier in the compiler. In practice, it probably doesn't matter much. Updates #19699 Fixes #19705 name old alloc/op new alloc/op delta Template 39.2MB ± 0% 39.3MB ± 0% +0.28% (p=0.008 n=5+5) Unicode 29.8MB ± 0% 29.8MB ± 0% ~ (p=1.000 n=5+5) GoTypes 113MB ± 0% 113MB ± 0% -0.55% (p=0.008 n=5+5) SSA 1.25GB ± 0% 1.25GB ± 0% +0.02% (p=0.008 n=5+5) Flate 25.3MB ± 0% 25.3MB ± 0% -0.24% (p=0.032 n=5+5) GoParser 31.7MB ± 0% 31.8MB ± 0% +0.31% (p=0.008 n=5+5) Reflect 78.2MB ± 0% 78.3MB ± 0% ~ (p=0.421 n=5+5) Tar 26.6MB ± 0% 26.7MB ± 0% +0.21% (p=0.008 n=5+5) XML 42.2MB ± 0% 42.2MB ± 0% ~ (p=0.056 n=5+5) name old allocs/op new allocs/op delta Template 385k ± 0% 387k ± 0% +0.51% (p=0.016 n=5+5) Unicode 321k ± 0% 321k ± 0% ~ (p=1.000 n=5+5) GoTypes 1.14M ± 0% 1.14M ± 0% ~ (p=1.000 n=5+5) SSA 9.71M ± 0% 9.72M ± 0% +0.10% (p=0.008 n=5+5) Flate 234k ± 1% 234k ± 1% ~ (p=0.690 n=5+5) GoParser 315k ± 0% 317k ± 0% +0.71% (p=0.008 n=5+5) Reflect 980k ± 0% 983k ± 0% +0.30% (p=0.032 n=5+5) Tar 251k ± 0% 252k ± 0% +0.55% (p=0.016 n=5+5) XML 392k ± 0% 393k ± 0% +0.30% (p=0.008 n=5+5) Change-Id: Ia10ff4bbf5c6eae782582cc9cbc9785494d4fb83 Reviewed-on: https://go-review.googlesource.com/38773 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> Reviewed-by: Matthew Dempsky <mdempsky@google.com> 2017-03-27 12:38:20 -06:00			`// errorcheck`

			`// Copyright 2017 The Go Authors. All rights reserved.`
			`// Use of this source code is governed by a BSD-style`
			`// license that can be found in the LICENSE file.`

			`package p`

			`func f() bool {`
			`if false {`
			`} else {`
			`return true`
			`}`
[dev.typeparams] cmd/compile/internal/types2: adjusted more error messages for compiler Triaged and adjusted more test/fixedbugs/* tests. Change-Id: I80b9ead2445bb8d126b7d79db4bea9ddcb225a84 Reviewed-on: https://go-review.googlesource.com/c/go/+/276812 Trust: Robert Griesemer <gri@golang.org> Run-TryBot: Robert Griesemer <gri@golang.org> Reviewed-by: Robert Findley <rfindley@google.com> TryBot-Result: Go Bot <gobot@golang.org> 2020-12-09 13:28:15 -07:00			`} // ERROR "missing return( at end of function)?"`