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Keith Randall ed737fd8cd [dev.ssa] cmd/compile: fix @ rewrite rules
The @ directive used to read the target block after some value
structure had already changed.  I don't think it was ever really
a bug, but it's confusing.

It might fail like this:

(Foo x y) -> @v.Args[0].Block (Bar y (Baz ...))

v.Op = Bar
v.Args[0] = y
v.Args[1] = v.Args[0].Block.NewValue(Baz, ...)

That new value is allocated in the block of y, not the
block of x.

Anyway, read the destination block first so this
potential bug can't happen.

Change-Id: Ie41d2fc349b35cefaa319fa9327808bcb781b4e2
Reviewed-on: https://go-review.googlesource.com/19900
Run-TryBot: Todd Neal <todd@tneal.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Todd Neal <todd@tneal.org>
2016-02-24 22:20:24 +00:00
api
doc spec: fix EBNF for slice syntax 2016-02-23 19:18:25 +00:00
lib/time misc: update timezone database to IANA 2016a 2016-02-03 03:14:59 +00:00
misc cmd/cgo: support multiple-value special form in VarDecl 2016-02-18 20:12:20 +00:00
src [dev.ssa] cmd/compile: fix @ rewrite rules 2016-02-24 22:20:24 +00:00
test [dev.ssa] Merge remote-tracking branch 'origin/master' into mergebranch 2016-02-23 14:42:20 -08:00
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