David Chase 2d56dee61b cmd/compile: escape analysis explanations added to -m -m output ... This should probably be considered "experimental" at this stage, but what it needs is feedback from adventurous adopters. I think the data structure used for describing escape reasons might be extendable to allow a cleanup of the underlying algorithms, which suffers from insufficiently separated concerns (the graph does not deal well with escape level adjustments, so it is augmented by a second custom-walk portion of the "flood" phase. It would be better to put it all, including level adjustments, in a single graph structure, and then simply flood the graph. Tweaked to avoid allocations in the no-logging case. Modified run.go to ignore lines with leading "#" in the output (since it can never match a line), and in -update_errors to ignore leading tabs in output lines and to normalize embedded filenames. Currently requires -m -m because otherwise the noise/update burden for the other escape tests is considerable. There is a partial test. Existing escape analysis tests seem to cover all except the panic case and what looks like it might be unreachable code in escape analysis. Fixes #10526. Change-Id: I2524fdec54facae48b00b2548e25d9e46fcaf832 Reviewed-on: https://go-review.googlesource.com/18041 Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>		2016-03-17 13:29:48 +00:00
..
bench	encoding/base64: fix streaming decode of padding-free base64	2016-01-08 15:07:45 +00:00
bugs
chan
ddd2.dir
dwarf
fixedbugs	cmd/compile: faster parameter parsing with no OKEY nodes	2016-03-16 18:54:31 +00:00
import2.dir
import4.dir
interface
ken
method4.dir
safe
stress
syntax	cmd/compile: use bufio.Reader directly in lexer	2016-03-11 21:27:23 +00:00
64bit.go
235.go
alias1.go
alias.go
append.go
args.go
assign1.go
assign.go
atomicload.go	cmd/compile: keep value use counts in SSA	2016-03-17 04:20:02 +00:00
bigalg.go
bigmap.go
blank1.go	cmd/compile: don't allow blank method declarations on builtins	2015-12-02 18:26:38 +00:00
blank.go
bom.go
bombad.go
bounds.go
chancap.go
chanlinear.go
char_lit1.go
char_lit.go
clearfat.go
closedchan.go
closure1.go
closure2.go
closure.go
cmp6.go
cmp.go
cmplx.go
cmplxdivide1.go
cmplxdivide.c
cmplxdivide.go
complit1.go
complit.go
compos.go
const1.go
const2.go
const3.go
const4.go
const5.go
const6.go
const.go
convert1.go
convert3.go
convert.go
convlit1.go
convlit.go
convT2X.go
copy.go
crlf.go
ddd1.go
ddd2.go
ddd.go
decl.go
declbad.go
defer.go
deferfin.go
deferprint.go
deferprint.out
divide.go
divmod.go
empty.go
env.go
eof1.go
eof.go
errchk
escape2.go	cmd/compile: better modeling of escape across loop levels	2016-01-13 04:01:00 +00:00
escape2n.go	cmd/compile: better modeling of escape across loop levels	2016-01-13 04:01:00 +00:00
escape3.go
escape4.go
escape5.go
escape_array.go
escape_because.go	cmd/compile: escape analysis explanations added to -m -m output	2016-03-17 13:29:48 +00:00
escape_calls.go
escape_closure.go
escape_field.go
escape_iface.go	cmd/compile: avoid leak of dottype expression if type does not contain pointers.	2016-02-19 16:10:14 +00:00
escape_indir.go
escape_level.go
escape_map.go
escape_param.go
escape_slice.go
escape_struct_param1.go
escape_struct_param2.go
escape_struct_return.go
escape.go
fibo.go
finprofiled.go	runtime: fix finalization and profiling of tiny allocations	2015-11-03 18:57:18 +00:00
float_lit2.go
float_lit3.go
float_lit.go
floatcmp.go
for.go
func1.go
func2.go
func3.go
func4.go
func5.go
func6.go
func7.go
func8.go	test: use go:noinline consistently	2015-11-03 02:01:34 +00:00
func.go
funcdup2.go
funcdup.go
gc1.go
gc2.go
gc.go
gcstring.go
goprint.go
goprint.out
goto.go
heapsampling.go	test: really force heap profile update in heapsampling.go	2015-11-12 18:32:13 +00:00
helloworld.go
helloworld.out
if.go
import1.go
import2.go
import4.go
import5.go
import.go
index0.go
index1.go
index2.go
index.go
indirect1.go
indirect.go
init1.go
init.go
initcomma.go
initialize.go
initializerr.go
initloop.go
inline.go	cmd/compile: add support for a go:noinline directive	2015-10-29 23:16:27 +00:00
int_lit.go
intcvt.go
iota.go
label1.go
label.go
linkmain_run.go	test: fix linkmain test	2015-12-17 23:36:13 +00:00
linkmain.go	cmd/link: reject non-package main toplevel.a file, remove dead code	2015-12-17 20:59:51 +00:00
linkx_run.go	cmd/link: remove alternate -X flag spelling	2016-02-19 01:35:25 +00:00
linkx.go
literal.go
live1.go
live2.go	[dev.ssa] cmd/compile: default compile+test with SSA	2015-10-30 20:35:20 +00:00
live_syscall.go	cmd/compile: recognize Syscall-like functions for liveness analysis	2016-01-14 01:16:45 +00:00
live.go	[dev.ssa] cmd/compile: default compile+test with SSA	2015-10-30 20:35:20 +00:00
mallocfin.go
map1.go
map.go
maplinear.go
method1.go	cmd/compile: ignore receiver parameters in Eqtype	2016-03-17 00:38:15 +00:00
method2.go
method3.go
method4.go
method5.go
method.go
named1.go
named.go
nil.go
nilcheck.go	[dev.ssa] cmd/compile: make cse faster	2016-01-28 20:59:20 +00:00
nilptr2.go
nilptr3_ssa.go	[dev.ssa] cmd/compile: get rid of nil checks before float loads/stores	2016-02-26 04:33:46 +00:00
nilptr3.go	[dev.ssa] test: remove extra tests from non-SSA builds	2016-02-26 19:07:16 +00:00
nilptr4.go
nilptr.go
nosplit.go	[dev.ssa] cmd/compile: shrink stack guard	2016-02-25 22:32:48 +00:00
nul1.go
opt_branchlikely.go	[dev.ssa] cmd/compile: adjust branch likeliness for calls/loops	2016-03-01 20:09:41 +00:00
parentype.go
peano.go
phiopt.go	[dev.ssa] cmd/compile/internal/ssa: simplify boolean phis	2016-03-01 17:56:13 +00:00
print.go
print.out
printbig.go
printbig.out
prove.go	cmd/compile/internal/ssa: generalize prove to all booleans	2016-03-13 12:05:41 +00:00
range.go
recover1.go
recover2.go
recover3.go
recover4.go
recover.go
reflectmethod1.go	cmd/compile: track reflect.Type.Method in deadcode	2016-03-11 21:19:20 +00:00
reflectmethod2.go	cmd/compile: track reflect.Type.Method in deadcode	2016-03-11 21:19:20 +00:00
reflectmethod3.go	cmd/compile: track reflect.Type.Method in deadcode	2016-03-11 21:19:20 +00:00
reflectmethod4.go	cmd/link: treat reflect.Value.Method like Call	2016-03-11 22:07:02 +00:00
rename1.go
rename.go
reorder2.go	test: use go:noinline consistently	2015-11-03 02:01:34 +00:00
reorder.go
return.go
rotate0.go
rotate1.go
rotate2.go
rotate3.go
rotate.go
run.go	cmd/compile: escape analysis explanations added to -m -m output	2016-03-17 13:29:48 +00:00
rune.go
runtime.go
shift1.go
shift2.go
sieve.go
sigchld.go
sigchld.out
simassign.go
sinit_run.go
sinit.go
sizeof.go
slice3.go
slice3err.go
slicecap.go
sliceopt.go	[dev.ssa] cmd/compile: default compile+test with SSA	2015-10-30 20:35:20 +00:00
solitaire.go
stack.go
string_lit.go
stringrange.go
struct0.go
switch2.go	cmd/compile: address several more 1.6 TODOs in parser	2015-11-21 07:21:23 +00:00
switch3.go
switch4.go
switch.go
tinyfin.go	runtime: fix finalization and profiling of tiny allocations	2015-11-03 18:57:18 +00:00
torture.go
turing.go
typecheck.go
typecheckloop.go
typeswitch1.go
typeswitch2.go
typeswitch3.go
typeswitch.go
undef.go
utf.go
varerr.go
varinit.go
writebarrier.go	cmd/compile: omit write barrier when assigning global function	2016-03-16 22:42:45 +00:00
zerodivide.go