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go/misc
Josh Bleecher Snyder ce3ee7cdae cmd/internal/obj: stop storing Text flags in From3
Prior to this CL, flags such as NOSPLIT
on ATEXT Progs were stored in From3.Offset.
Some but not all of those flags were also
duplicated into From.Sym.Attribute.

This CL migrates all of those flags into
From.Sym.Attribute and stops creating a From3.

A side-effect of this is that printing an
ATEXT Prog can no longer simply dump From3.Offset.
That's kind of good, since the raw flag value
wasn't very informative anyway, but it did
necessitate a bunch of updates to the cmd/asm tests.

The reason I'm doing this work now is that
avoiding storing flags in both From.Sym and From3.Offset
simplifies some other changes to fix the data
race first described in CL 40254.

This CL almost passes toolstash-check -all.
The only changes are in cases where the assembler
has decided that a function's flags may be altered,
e.g. to make a function with no calls in it NOSPLIT.
Prior to this CL, that information was not printed.

Sample before:

"".Ctz64 t=1 size=63 args=0x10 locals=0x0
	0x0000 00000 (/Users/josh/go/tip/src/runtime/internal/sys/intrinsics.go:35)	TEXT	"".Ctz64(SB), $0-16
	0x0000 00000 (/Users/josh/go/tip/src/runtime/internal/sys/intrinsics.go:35)	FUNCDATA	$0, gclocals·f207267fbf96a0178e8758c6e3e0ce28(SB)

Sample after:

"".Ctz64 t=1 nosplit size=63 args=0x10 locals=0x0
	0x0000 00000 (/Users/josh/go/tip/src/runtime/internal/sys/intrinsics.go:35)	TEXT	"".Ctz64(SB), NOSPLIT, $0-16
	0x0000 00000 (/Users/josh/go/tip/src/runtime/internal/sys/intrinsics.go:35)	FUNCDATA	$0, gclocals·f207267fbf96a0178e8758c6e3e0ce28(SB)

Observe the additional "nosplit" in the first line
and the additional "NOSPLIT" in the second line.

Updates #15756

Change-Id: I5c59bd8f3bdc7c780361f801d94a261f0aef3d13
Reviewed-on: https://go-review.googlesource.com/40495
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-04-12 21:53:39 +00:00
..
android misc/android: make the exec wrapper exit code parsing more robust 2016-06-08 05:24:53 +00:00
arm all: make copyright headers consistent with one space after period 2016-05-02 13:43:18 +00:00
cgo plugin: properly handle recursively defined types 2017-04-12 12:46:07 +00:00
chrome/gophertool all: link to https instead of http 2015-07-11 14:36:33 +00:00
git misc/git: Fix non-literal period in pre-commit grep 2016-02-26 19:06:38 +00:00
ios misc/ios,cmd/go, runtime/cgo: fix iOS test harness (again) 2017-03-04 01:43:13 +00:00
linkcheck
nacl cmd/internal/obj: stop storing Text flags in From3 2017-04-12 21:53:39 +00:00
sortac misc/sortac: add tool to sort the AUTHORS and CONTRIBUTORS files 2015-11-12 17:07:09 +00:00
swig all: make copyright headers consistent with one space after period 2016-05-02 13:43:18 +00:00
trace misc/trace: disable trace resolution warning 2016-07-21 18:17:31 +00:00
benchcmp all: use golang.org/x/... import paths 2014-11-10 09:15:57 +11:00
editors all: don't refer to code.google.com/p/go{,-wiki}/ 2015-02-06 14:41:47 +00:00