diff options
| author | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-01-25 19:50:56 +0000 |
|---|---|---|
| committer | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-01-25 19:50:56 +0000 |
| commit | 628ce22b27ee5839cde4a7e52f06ef7b556c6add (patch) | |
| tree | c3bf33476cd79def86c5357582c9dcc5d72f16bb /gcc | |
| parent | f9c26062b6910114b2590ca1095b74732d4de319 (diff) | |
| download | gcc-628ce22b27ee5839cde4a7e52f06ef7b556c6add.tar.gz | |
PR tree-optimization/47265
PR tree-optimization/47443
* tree-ssa-forwprop.c (forward_propagate_addr_expr): Return false
if name still has some uses.
* gcc.c-torture/compile/pr47265.c: New test.
* gcc.dg/pr47443.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@169250 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/compile/pr47265.c | 20 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr47443.c | 14 | ||||
| -rw-r--r-- | gcc/tree-ssa-forwprop.c | 4 |
5 files changed, 50 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 39b8d441cc5..6e1c8f5cd80 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2011-01-25 Jakub Jelinek <jakub@redhat.com> + + PR tree-optimization/47265 + PR tree-optimization/47443 + * tree-ssa-forwprop.c (forward_propagate_addr_expr): Return false + if name still has some uses. + 2011-01-25 Martin Jambor <mjambor@suse.cz> PR tree-optimization/47382 diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index b23f02dd465..24fbc0bba06 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,10 @@ +2011-01-25 Jakub Jelinek <jakub@redhat.com> + + PR tree-optimization/47265 + PR tree-optimization/47443 + * gcc.c-torture/compile/pr47265.c: New test. + * gcc.dg/pr47443.c: New test. + 2011-01-25 Martin Jambor <mjambor@suse.cz> PR tree-optimization/47382 diff --git a/gcc/testsuite/gcc.c-torture/compile/pr47265.c b/gcc/testsuite/gcc.c-torture/compile/pr47265.c new file mode 100644 index 00000000000..183c3f98621 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/compile/pr47265.c @@ -0,0 +1,20 @@ +/* PR tree-optimization/47265 */ + +struct S +{ + char a[3]; + char b[3]; +}; + +void +bar (char *dst, const char *src, unsigned n) +{ + while (n--) + *dst++ = *src ? *src++ : ' '; +} + +void +foo (struct S *s) +{ + bar (s->a, s->b, 3); +} diff --git a/gcc/testsuite/gcc.dg/pr47443.c b/gcc/testsuite/gcc.dg/pr47443.c new file mode 100644 index 00000000000..fa7d6b98ad3 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr47443.c @@ -0,0 +1,14 @@ +/* PR tree-optimization/47443 */ +/* { dg-do compile } */ +/* { dg-options "-O -fstack-check=generic" } */ + +static inline bar (char *c, int i) +{ + return c + i > c; +} + +int foo () +{ + char c[100]; + return (bar (c, 1)); +} diff --git a/gcc/tree-ssa-forwprop.c b/gcc/tree-ssa-forwprop.c index 64c8e88e26e..ee12e40c972 100644 --- a/gcc/tree-ssa-forwprop.c +++ b/gcc/tree-ssa-forwprop.c @@ -1,5 +1,5 @@ /* Forward propagation of expressions for single use variables. - Copyright (C) 2004, 2005, 2007, 2008, 2009, 2010 + Copyright (C) 2004, 2005, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. This file is part of GCC. @@ -1114,7 +1114,7 @@ forward_propagate_addr_expr (tree name, tree rhs) } } - return all; + return all && has_zero_uses (name); } /* Forward propagate the comparison defined in STMT like |