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| author | bonzini <bonzini@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-07-21 07:24:34 +0000 |
|---|---|---|
| committer | bonzini <bonzini@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-07-21 07:24:34 +0000 |
| commit | 7e3cc6817ae6be36340eb0c1978c1b3210cab69e (patch) | |
| tree | 1ae11d72157fada15be9c9e63cd5c9c48811abca /gcc/testsuite/gcc.dg/tree-ssa/pr19210-1.c | |
| parent | a195a2e0542f43ead546c488f0f7e687d2837570 (diff) | |
| download | gcc-7e3cc6817ae6be36340eb0c1978c1b3210cab69e.tar.gz | |
gcc:
2005-07-21 Paolo Bonzini <bonzini@gnu.org>
Zdenek Dvorak <dvorakz@suse.cz>
PR tree-optimization/19210
* common.opt (Wunsafe-loop-optimizations, funsafe-loop-optimizations):
New.
* Makefile.in (tree-ssa-loop-niter.o): Depend intl.o.
* loop-iv.c (get_simple_loop_desc): If -funsafe-loop-optimizations,
rely on unproven assumptions.
* predict.c (predict_loops): Adjust call to number_of_iterations_exit.
* tree-flow.h (number_of_iterations_exit): Add final parameter.
* tree-scalar-evolution.c (number_of_iterations_in_loop): Adjust call
to number_of_iterations_exit.
* tree-ssa-loop-ivcanon.c (empty_loop_p): Likewise.
* tree-ssa-loop-ivopts.c (niter_for_exit): Likewise.
* tree-ssa-loop-niter.c (find_loop_niter,
estimate_numbers_of_iterations_loop): Likewise.
(number_of_iterations_exit): Honor the new options.
* doc/invoke.texi (Wunsafe-loop-optimizations,
funsafe-loop-optimizations): Document them.
gcc/testsuite:
2005-07-21 Paolo Bonzini <bonzini@gnu.org>
* gcc.dg/tree-ssa/pr19210-1.c: New.
* gcc.dg/tree-ssa/pr19210-2.c: New.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@102225 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa/pr19210-1.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/pr19210-1.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr19210-1.c b/gcc/testsuite/gcc.dg/tree-ssa/pr19210-1.c new file mode 100644 index 00000000000..4d6100a86c9 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr19210-1.c @@ -0,0 +1,20 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -Wunsafe-loop-optimizations" } */ +extern void g(void); + +void +f (unsigned n) +{ + unsigned k; + for(k = 0;k <= n;k++) /* { dg-warning "cannot optimize.*infinite loops" } */ + g(); + + for(k = 0;k <= n;k += 4) /* { dg-warning "cannot optimize.*overflow" } */ + g(); + + for(k = 5;k <= n;k += 5) /* { dg-warning "cannot optimize.*overflow" } */ + g(); + + for(k = 15;k >= n;k--) /* { dg-warning "cannot optimize.*infinite" } */ + g(); +} |