diff options
author | Pedro F. Giffuni <pfg@FreeBSD.org> | 2013-11-23 18:32:53 +0000 |
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committer | Pedro F. Giffuni <pfg@FreeBSD.org> | 2013-11-23 18:32:53 +0000 |
commit | 81e5b01765266b6e24802deab241aeb513eb5704 (patch) | |
tree | 2fc63906136497dd451e94988bc08838475abff7 /contrib/gcc/tree-vrp.c | |
parent | 0a9655a082b25b1eaeb36ad7832f4c91d3e7f45d (diff) |
gcc: Bring updates from Google's enhanced gcc-4.2.1.
Google released and enhanced version of gcc-4.2.1 plus their local
patches for Android[1].
The patches are owned by Google and the license hasn't been changed
from the original GPLv2. We are only bringing a subset of the
available patches that may be helpful in FreeBSD. Changes specific
to android are not included.
From the README.google file[1].
Patches applied to google_vendor_src_branch/gcc/gcc-4.2.1:
gcc/Makefile.in
gcc/c-common.c
gcc/c-common.h
gcc/c-opts.c
gcc/c-typeck.c
gcc/cp/typeck.c
gcc/doc/invoke.texi
gcc/flags.h
gcc/opts.c
gcc/tree-flow.h
gcc/tree-ssa-alias-warnings.c
gcc/tree-ssa-alias.c
Backport of -Wstrict-aliasing from mainline.
Silvius Rus <rus@google.com>
gcc/coverage.c:
Patch coverage_checksum_string for PR 25351.
Seongbae Park <spark@google.com>
Not yet submitted to FSF.
gcc/c-opts.c
gcc/c-ppoutput.c
gcc/c.opt
gcc/doc/cppopts.texi
libcpp/Makefile.in
libcpp/directives-only.c
libcpp/directives.c
libcpp/files.c
libcpp/include/cpplib.h
libcpp/init.c
libcpp/internal.h
libcpp/macro.c
Support for -fdirectives-only.
Ollie Wild <aaw@google.com>.
Submitted to FSF but not yet approved.
libstdc++-v3/include/ext/hashtable.h
http://b/742065
http://b/629994
Reduce min size of hashtable for hash_map, hash_set from 53 to 5
libstdc++-v3/include/ext/hashtable.h
http://b/629994
Do not iterate over buckets if hashtable is empty.
gcc/common.opt
gcc/doc/invoke.texi
gcc/flags.h
gcc/gimplify.c
gcc/opts.c
Add Saito's patch for -finstrument-functions-exclude-* options.
gcc/common.opt
gcc/doc/invoke.texi
gcc/final.c
gcc/flags.h
gcc/opts.c
gcc/testsuite/gcc.dg/Wframe-larger-than.c
Add a new flag -Wframe-larger-than- which enables a new warning
when a frame size of a function is larger than specified.
This patch hasn't been integrated into gcc mainline yet.
gcc/tree-vrp.c
Add a hack to avoid using ivopts information for pointers starting
at constant values.
Reference:
[1]
https://android.googlesource.com/toolchain/gcc/+/master/gcc-4.2.1/
Obtained from: Google Inc.
MFC after: 3 weeks
Notes
Notes:
svn path=/head/; revision=258501
Diffstat (limited to 'contrib/gcc/tree-vrp.c')
-rw-r--r-- | contrib/gcc/tree-vrp.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/contrib/gcc/tree-vrp.c b/contrib/gcc/tree-vrp.c index 0c9824d54879..f97bd6131048 100644 --- a/contrib/gcc/tree-vrp.c +++ b/contrib/gcc/tree-vrp.c @@ -2509,12 +2509,18 @@ adjust_range_with_scev (value_range_t *vr, struct loop *loop, tree stmt, true)) return; + type = TREE_TYPE (var); + + /* If we see a pointer type starting at a constant, then we have an + unusual ivopt. It may legitimately wrap. */ + if (POINTER_TYPE_P (type) && is_gimple_min_invariant (init)) + return; + /* We use TYPE_MIN_VALUE and TYPE_MAX_VALUE here instead of negative_overflow_infinity and positive_overflow_infinity, because we have concluded that the loop probably does not wrap. */ - type = TREE_TYPE (var); if (POINTER_TYPE_P (type) || !TYPE_MIN_VALUE (type)) tmin = lower_bound_in_type (type, type); else |