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4ce06f4b5c
Ordinary switch statements are rewritten into a sequence of if statements. Staticly dead cases were not being eliminated because the rewrite introduced a temporary, which hid the fact that the case was a constant. Stop doing that. This eliminates dead code in the standard library at: runtime/cgocall.go:219 runtime/cgocall.go:269 debug/gosym/pclntab.go:175 debug/macho/file.go:208 math/big/nat.go:635 math/big/nat.go:850 math/big/nat.go:1058 cmd/pprof/internal/commands/commands.go:86 net/sock_bsd.go:19 cmd/go/build.go:2657 cmd/go/env.go:90 Fixes #9608. Change-Id: Ic23a05dfbb1ad91d5f62a6506b35a13e51b33e38 Reviewed-on: https://go-review.googlesource.com/3980 Reviewed-by: Keith Randall <khr@golang.org>
15 lines
478 B
Go
15 lines
478 B
Go
// rundir
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// Copyright 2015 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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// Issue 9608: dead code elimination in switch statements.
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// This has to be done as a package rather than as a file,
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// because run.go runs files with 'go run', which passes the
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// -complete flag to compiler, causing it to complain about
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// the intentionally unimplemented function fail.
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package ignored
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