gcc/libgo
Ian Lance Taylor ea5ac5a69b compiler,runtime: pass old slice's ptr/len/cap by value to growslice
In the C calling convention, on AMD64, and probably a number of
    other architectures, a 3-word struct argument is passed on stack.
    This is less efficient than passing in three registers. Further,
    this may affect the code generation in other part of the program,
    even if the function is not actually called.
    
    Slices are common in Go and append is a common slice operation,
    which calls growslice in the growing path. To improve the code
    generation, pass the slice header's three fields as separate
    values, instead of a struct, to growslice.
    
    The drawback is that this makes the runtime implementation
    slightly diverges from the gc runtime.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/168277

From-SVN: r269811
2019-03-19 18:42:43 +00:00
..
config re PR bootstrap/82856 (--enable-maintainter-mode broken by incompatiblity of gcc's required automake and modern Perl) 2018-10-31 20:46:17 +00:00
go compiler,runtime: pass old slice's ptr/len/cap by value to growslice 2019-03-19 18:42:43 +00:00
misc/cgo libgo: update to Go 1.12.1 2019-03-18 20:27:59 +00:00
runtime libgo: fix build on AIX 2019-03-19 14:00:59 +00:00
testsuite commit 66ac9466852d11e968f8fd2ad6ffc7386cee49e1 2019-03-01 01:03:54 +00:00
LICENSE LICENSE: separate, change PATENTS text. 2010-12-06 22:27:47 +00:00
MERGE libgo: update to Go 1.12.1 2019-03-18 20:27:59 +00:00
Makefile.am libgo: fix go_export extraction on Darwin 2019-02-28 01:01:46 +00:00
Makefile.in libgo: fix go_export extraction on Darwin 2019-02-28 01:01:46 +00:00
PATENTS LICENSE: separate, change PATENTS text. 2010-12-06 22:27:47 +00:00
README libgo/README: Minor updates. 2015-03-13 18:53:13 +00:00
README.gcc libgo/README.gcc: Mention GCCGO_RUN_ALL_TESTS. 2011-03-09 19:17:56 +00:00
VERSION libgo: update to Go 1.12.1 2019-03-18 20:27:59 +00:00
aclocal.m4 re PR bootstrap/82856 (--enable-maintainter-mode broken by incompatiblity of gcc's required automake and modern Perl) 2018-10-31 20:46:17 +00:00
check-packages.txt libgo: update to Go1.12beta2 2019-01-18 19:04:36 +00:00
config.h.in runtime, sync: use __atomic intrinsics instead of __sync 2019-02-01 21:55:38 +00:00
configure re PR go/89172 (FAIL: runtime/pprof) 2019-02-27 22:35:10 +00:00
configure.ac re PR go/89172 (FAIL: runtime/pprof) 2019-02-27 22:35:10 +00:00
goarch.sh libgo: support x32 as GOARCH=amd64p32 GOOS=linux 2018-10-01 20:17:11 +00:00
godeps.sh libgo: update to Go1.10beta1 2018-01-09 01:23:08 +00:00
gotool-packages.txt libgo: update to Go1.12beta2 2019-01-18 19:04:36 +00:00
libgo-packages.txt libgo: update to Go1.12beta2 2019-01-18 19:04:36 +00:00
libgo.imp Big merge of changes to gofrontend repo that were postponed due to the 2017-05-10 17:26:09 +00:00
match.sh libgo: update to Go1.12beta2 2019-01-18 19:04:36 +00:00
merge.sh libgo: update to Go1.12beta2 2019-01-18 19:04:36 +00:00
mkrsysinfo.sh libgo: adapt Solaris 12 references 2017-11-14 14:26:04 +00:00
mkruntimeinc.sh libgo: refactor code to enumerate stdlib packages 2018-05-02 21:57:35 +00:00
mksigtab.sh libgo: add configury and sysinfo support for hurd 2019-02-01 22:46:39 +00:00
mksysinfo.sh libgo: fix build on AIX 2019-03-19 14:00:59 +00:00
mvifdiff.sh runtime: introduce mvifdiff.sh script to replace GCC's move-if-change 2014-12-01 01:06:29 +00:00
sysinfo.c syscall: remove Ustat 2018-06-22 14:25:52 +00:00

README

See ../README.

This is the runtime support library for the Go programming language.
This library is intended for use with the Go frontend.

This library should not be stripped when it is installed.  Go code
relies on being able to look up file/line information, which comes
from the debugging info using the libbacktrace library.

The library has only been tested on GNU/Linux using glibc, and on
Solaris.  It should not be difficult to port to other operating
systems.

Directories:

go
  A copy of the Go library from http://golang.org/, with several
  changes for gccgo.

runtime
  Runtime functions, written in C, which are called directly by the
  compiler or by the library.

Contributing
============

To contribute patches to the files in this directory, please see
http://golang.org/doc/gccgo_contribute.html .

The master copy of these files is hosted at
http://code.google.com/p/gofrontend .  Changes to these files require
signing a Google contributor license agreement.  If you are the
copyright holder, you will need to agree to the individual contributor
license agreement at
http://code.google.com/legal/individual-cla-v1.0.html.  This agreement
can be completed online.

If your organization is the copyright holder, the organization will
need to agree to the corporate contributor license agreement at
http://code.google.com/legal/corporate-cla-v1.0.html.

If the copyright holder for your code has already completed the
agreement in connection with another Google open source project, it
does not need to be completed again.