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Josh Bleecher Snyder 4ce06f4b5c cmd/gc: eliminate dead code in switch statements
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>
2015-02-06 19:05:47 +00:00
api runtime: add GODEBUG=gccheckmark=0/1 2015-01-12 16:36:50 +00:00
doc all: don't refer to code.google.com/p/go{,-wiki}/ 2015-02-06 14:41:47 +00:00
include liblink: require use of TYPE_ADDR, not TYPE_CONST 2015-02-04 16:50:06 +00:00
lib/time remove the obsolete lib/codereview. 2014-12-08 07:51:54 +00:00
misc all: don't refer to code.google.com/p/go{,-wiki}/ 2015-02-06 14:41:47 +00:00
src cmd/gc: eliminate dead code in switch statements 2015-02-06 19:05:47 +00:00
test cmd/gc: eliminate dead code in switch statements 2015-02-06 19:05:47 +00:00
.gitattributes .gitattributes: prevent all magic line ending changes 2014-12-12 23:14:54 +00:00
.gitignore all: tighten overly-broad runtime/z* gitignore line 2014-12-10 00:45:47 +00:00
AUTHORS A+C: add another email address for Emil Hessman 2014-11-12 10:01:23 -08:00
CONTRIBUTING.md doc: direct people to the mailing list 2015-01-18 21:27:07 +00:00
CONTRIBUTORS C: add Nick Cooper (Google CLA). 2014-11-14 17:03:17 +11:00
LICENSE
PATENTS
README.md README: emphasize that we don't accept pull requests 2015-01-08 18:50:47 +00:00
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robots.txt

README.md

The Go Programming Language

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