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| author | Jeff Law <law@redhat.com> | 2005-02-21 07:55:38 -0700 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 2005-02-21 07:55:38 -0700 |
| commit | 40cd9e66faa14ab388ea0f106ef9b585f8d75b7e (patch) | |
| tree | a235ab24b418d95065de429d6824136f1ab3d5ac /gcc/testsuite | |
| parent | a4de48bc6c37e607c2dd527e355801b75704e4eb (diff) | |
| download | gcc-40cd9e66faa14ab388ea0f106ef9b585f8d75b7e.zip gcc-40cd9e66faa14ab388ea0f106ef9b585f8d75b7e.tar.gz gcc-40cd9e66faa14ab388ea0f106ef9b585f8d75b7e.tar.bz2 | |
* gcc.dg/tree-ssa/20041122-1.c: New test for missing optimization.
From-SVN: r95332
Diffstat (limited to 'gcc/testsuite')
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/20041122-1.c | 39 |
2 files changed, 43 insertions, 0 deletions
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 0feb30b..d7200a6 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2005-01-31 Jeff Law <law@redhat.com> + + * gcc.dg/tree-ssa/20041122-1.c: New test for missing optimization. + 2005-02-20 Tobias Schl"uter <tobias.schlueter@physik.uni-muenchen.de> * gfortran.dg/do_iterator: Split loop, markup all lines for diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20041122-1.c b/gcc/testsuite/gcc.dg/tree-ssa/20041122-1.c new file mode 100644 index 0000000..89b9064 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/20041122-1.c @@ -0,0 +1,39 @@ +/* { dg-do compile } */ +/* { dg-options "-O1 -fdump-tree-dom3" } */ + + +typedef unsigned int size_t; +extern void *xmalloc (size_t) __attribute__ ((__malloc__)); +struct edge_def +{ + struct basic_block_def *dest; + int flags; +}; +typedef struct edge_def *edge; +struct basic_block_def +{ + int flags; +}; +typedef struct basic_block_def *basic_block; +extern int n_basic_blocks; +extern edge frob (); +void +find_unreachable_blocks (int frobit) +{ + basic_block *tos, *worklist, bb; + tos = worklist = xmalloc (sizeof (basic_block) * n_basic_blocks); + edge e = frob(); + if (!(e->dest->flags & 4)) + { + e->dest->flags |= 4; + *tos++ = e->dest; + } +} + +/* If the aliasing code does its job properly, then we should be + able to determine that modifying e->dest->flags does not + modify e or e->dest. The net result is that we only need one + load of e->dest. */ +/* { dg-final { scan-tree-dump-times "->dest" 1 "dom3" { xfail *-*-* } } } */ + + |