Go to file
Jakub Jelinek 43a4fc095e expander: Optimize store_expr from STRING_CST [PR95052]
In the following testcase, store_expr of e.g. 97 bytes long string literal
into 1MB long array is implemented by copying the 97 bytes from .rodata
section, followed by clearing the remaining bytes.  But, as the STRING_CST
has type char[1024*1024], we actually allocate whole 1MB in .rodata section
for it, even when we only use the first 97 bytes from that.

The following patch tweaks it so that if we are going to initialize only the
small part from it, we don't emit all the zeros that we never use after it.

2020-05-29  Jakub Jelinek  <jakub@redhat.com>

	PR middle-end/95052
	* expr.c (store_expr): If expr_size is constant and significantly
	larger than TREE_STRING_LENGTH, set temp to just the
	TREE_STRING_LENGTH portion of the STRING_CST.

	* gcc.target/i386/pr95052.c: New test.
2020-05-29 10:42:50 +02:00
config
contrib git_commit: fix duplicite email address. 2020-05-29 09:00:00 +02:00
fixincludes
gcc expander: Optimize store_expr from STRING_CST [PR95052] 2020-05-29 10:42:50 +02:00
gnattools
gotools
include
INSTALL
intl
libada
libatomic
libbacktrace
libcc1
libcpp libcpp, libdecnumber: configure and substitute AR 2020-05-23 21:59:02 +00:00
libdecnumber libcpp, libdecnumber: configure and substitute AR 2020-05-23 21:59:02 +00:00
libffi
libgcc Daily bump. 2020-05-29 00:16:23 +00:00
libgfortran Daily bump. 2020-05-29 00:16:23 +00:00
libgo libgo: update x/sys/cpu after gccgo support added 2020-05-25 13:43:44 -07:00
libgomp Fixes a hang on an invalid ID in a WAIT statement. 2020-05-23 19:01:43 +02:00
libhsail-rt
libiberty
libitm
libobjc
liboffloadmic
libphobos
libquadmath
libsanitizer Daily bump. 2020-05-27 07:45:56 +00:00
libssp
libstdc++-v3 Daily bump. 2020-05-28 04:23:50 +00:00
libvtv
lto-plugin Daily bump. 2020-05-27 07:45:56 +00:00
maintainer-scripts Daily bump. 2020-05-28 04:23:50 +00:00
zlib
.dir-locals.el
.gitattributes
.gitignore
ABOUT-NLS
ar-lib
ChangeLog Daily bump. 2020-05-29 00:16:23 +00:00
ChangeLog.jit
ChangeLog.tree-ssa
compile
config-ml.in
config.guess
config.rpath
config.sub
configure jit: port libgccjit to Windows 2020-05-28 14:43:58 -04:00
configure.ac jit: port libgccjit to Windows 2020-05-28 14:43:58 -04:00
COPYING
COPYING3
COPYING3.LIB
COPYING.LIB
COPYING.RUNTIME
depcomp
install-sh
libtool-ldflags
libtool.m4
lt~obsolete.m4
ltgcc.m4
ltmain.sh
ltoptions.m4
ltsugar.m4
ltversion.m4
MAINTAINERS
Makefile.def
Makefile.in
Makefile.tpl
missing
mkdep
mkinstalldirs
move-if-change
multilib.am
README
symlink-tree
test-driver
ylwrap

This directory contains the GNU Compiler Collection (GCC).

The GNU Compiler Collection is free software.  See the files whose
names start with COPYING for copying permission.  The manuals, and
some of the runtime libraries, are under different terms; see the
individual source files for details.

The directory INSTALL contains copies of the installation information
as HTML and plain text.  The source of this information is
gcc/doc/install.texi.  The installation information includes details
of what is included in the GCC sources and what files GCC installs.

See the file gcc/doc/gcc.texi (together with other files that it
includes) for usage and porting information.  An online readable
version of the manual is in the files gcc/doc/gcc.info*.

See http://gcc.gnu.org/bugs/ for how to report bugs usefully.

Copyright years on GCC source files may be listed using range
notation, e.g., 1987-2012, indicating that every year in the range,
inclusive, is a copyrightable year that could otherwise be listed
individually.