I promised it wouldn't last very long.
People who really need this can sync to 6a5647d82728.
««« original CL description
gc: add GOEXPERIMENT=os.Error
This won't last long, I promise.
R=ken2
CC=golang-dev
https://golang.org/cl/5330066
»»»
R=ken2
CC=golang-dev
https://golang.org/cl/5333053
Got rid of all the magic mystery globals. Now
for %N, %T, and %S, the flags +,- and # set a sticky
debug, sym and export mode, only visible in the new fmt.c.
Default is error mode. Handle h and l flags consistently with
the least side effects, so we can now change
things without worrying about unrelated things
breaking.
fixes#2361
R=rsc
CC=golang-dev
https://golang.org/cl/5316043
There is no semantic change here, just better errors.
If a function says it takes a byte, and you pass it an int,
the compiler error now says that you need a byte, not
that you need a uint8.
Groundwork for rune.
R=ken2
CC=golang-dev
https://golang.org/cl/5300042
The old m[x] = 0, false syntax will be deleted
in a month or so, once people have had time to
change their code (there is a gofix in a separate CL).
R=ken2
CC=golang-dev
https://golang.org/cl/5265048
string literals used as package qualifiers are now prefixed with '@'
which obviates the need for the extra ':' before tags.
R=rsc, gri, lvd
CC=golang-dev
https://golang.org/cl/5129057
The linker would catch them if gc succeeded,
but too often the cycle manifests as making the
current package and the imported copy of itself
appear as different packages, which result in
type signature mismatches that confuse users.
As a crutch, add the -p flag to say 'if you see an
import of this package, give up early'. Results in
messages like (during gotest in sort):
export_test.go:7: import "sort" while compiling that package (import cycle)
export_test.go:7: import "container/heap": package depends on "sort" (import cycle)
Fixes#2042.
R=ken
CC=bradfitz, dsymonds, golang-dev
https://golang.org/cl/4972057
allocparams + tempname + compactframe
all knew about how to place stack variables.
Now only compactframe, renamed to allocauto,
does the work. Until the last minute, each PAUTO
variable is in its own space and has xoffset == 0.
This might break 5g. I get failures in concurrent
code running under qemu and I can't tell whether
it's 5g's fault or qemu's. We'll see what the real
ARM builders say.
R=ken2
CC=golang-dev
https://golang.org/cl/4973057
Was keeping a pointer to the labeled statement in n->right,
which meant that generic traversals of the tree visited it twice.
That combined with aggressive flattening of the block
structure when possible during parsing meant that
the kinds of label: code label: code label: code sequences
generated by yacc were giving the recursion 2ⁿ paths
through the program.
Fixes#2212.
R=lvd
CC=golang-dev
https://golang.org/cl/4960050
Does as much as possible in data layout instead
of during the init function.
Handles var x = y; var y = z as a special case too,
because it is so prevalent in package unicode
(var Greek = _Greek; var _Greek = []...).
Introduces InitPlan description of initialized data
so that it can be traversed multiple times (for example,
in the copy handler).
Cuts package unicode's init function size by 8x.
All that remains there is map initialization, which
is on the chopping block too.
Fixes sinit.go test case.
Aggregate DATA instructions at end of object file.
Checkpoint. More to come.
R=ken2
CC=golang-dev
https://golang.org/cl/4969051
gc/bits.c
. improved format with associated cast;
gc/closure.c
gc/dcl.c
gc/range.c
gc/reflect.c
gc/sinit.c
. dropped unnecessary assignments;
gc/gen.c
. dropped unnecessary assignment;
. added static qualifier to local function definition;
gc/go.h
. added varargck pragmas;
gc/lex.c
. used {} instead of ; in if statement to suppress warning;
. replaced exit(0) with exits(0);
. added compilation conditions for SIGBUS/SIGSEGV;
. dropped unnecessary assignment;
gc/mparith2.c
. dropped four unnecessary assignments/initialisations;
gc/obj.c
. added type cast to local pointer;
gc/pgen.c
. added cast and related print format;
gc/subr.c
. replaced exit(1) with exits("error");
. replaced unlink() with remove();
. renamed local cistrmp() as ucistrmp() to remove conflict with
Plan 9 function by the same name;
gc/swt.c
. added braces instead of ; as empty statment;
gc/typecheck.c
. added static qualifier to local function definition;
. dropped unnecessary assignments;
gc/walk.c
. dropped unnecessary assignments;
. added static qualifier to local function definitions;
R=rsc
CC=golang-dev
https://golang.org/cl/4964046
-s now means *disable* escape analysis.
Fix escape leaks for struct/slice/map literals.
Add ... tracking.
Rewrite new(T) and slice literal into stack allocation when safe.
Add annotations to reflect.
Reflect is too chummy with the compiler,
so changes like these affect it more than they should.
R=lvd, dave, gustavo
CC=golang-dev
https://golang.org/cl/4954043
#include "go.h" (or "gg.h")
becomes
#include <u.h>
#include <libc.h>
#include "go.h"
so that go.y can #include <stdio.h>
after <u.h> but before "go.h".
This is necessary on Plan 9.
R=ken2
CC=golang-dev
https://golang.org/cl/4971041
For now it's switch-on-and-offable with -s, and the effects can be inspected
with -m. Defaults are the old codepaths.
R=rsc
CC=golang-dev
https://golang.org/cl/4634073
The change adds specialized type algorithms
for slices and types of size 8/16/32/64/128.
It significantly accelerates chan and map operations
for most builtin types as well as user structs.
benchmark old,ns/op new,ns/op
BenchmarkChanUncontended 226 94
(on Intel Xeon E5620, 2.4GHz, Linux 64 bit)
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/4815087
Required moving some parts of gc/pgen.c to ?g/ggen.c
on linux tests pass for all 3 architectures, and
frames are actually compacted (diagnostic code for
that has been removed from the CL).
R=rsc
CC=golang-dev
https://golang.org/cl/4571071
After allocparams and walk, remove unused auto variables
and re-layout the remaining in reverse alignment order.
R=rsc
CC=golang-dev
https://golang.org/cl/4568068
Previously, whether declaring a type which copied the structure of a type it was referenced in via a pointer field would work depended on whether you declared it before or after the type it copied, e.g. type T2 T1; type T1 struct { F *T2 } would work, however type T1 struct { F *T2 }; type T2 T1 wouldn't.
Fixes#667.
R=rsc
CC=golang-dev
https://golang.org/cl/4313064
go/types: update for export data format change
reflect: require package qualifiers to match during interface check
runtime: require package qualifiers to match during interface check
test: fixed bug324, adapt to be silent
Fixes#1550.
Issue 1536 remains open.
R=gri, ken2, r
CC=golang-dev
https://golang.org/cl/4442071
The ld time was dominated by symbol table processing, so
* increase hash table size
* emit fewer symbols in gc (just 1 per string, 1 per type)
* add read-only lookup to avoid creating spurious symbols
* add linked list to speed whole-table traversals
Breaks dwarf generator (no idea why), so disable dwarf.
Reduces time for 6l to link godoc by 25%.
R=ken2
CC=golang-dev
https://golang.org/cl/4383047
Trivial fix to '// n' comments against etype enum in go.h, as these have
got out of sync.
R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/4240097
Change unsafe.Pointer to be its own kind of
type, instead of making it equivalent to *any.
The change complicates import and export
but avoids the need to find all the places that
operate on pointers but should not operate on
unsafe.Pointer.
Fixes#1566. (a different way)
Fixes#1582.
R=ken2
CC=golang-dev
https://golang.org/cl/4264050
