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| author | Zdenek Dvorak <dvorakz@suse.cz> | 2005-07-27 16:04:17 +0200 |
|---|---|---|
| committer | Zdenek Dvorak <rakdver@gcc.gnu.org> | 2005-07-27 14:04:17 +0000 |
| commit | 26c406400e471a956f256173189fc5d556e064d7 (patch) | |
| tree | 0c171b755271163d8c64219f823f59bc45b7f8c4 /gcc | |
| parent | 3ac01fdeef1976c9150d3efa1b5c2915f210a78f (diff) | |
| download | gcc-26c406400e471a956f256173189fc5d556e064d7.zip gcc-26c406400e471a956f256173189fc5d556e064d7.tar.gz gcc-26c406400e471a956f256173189fc5d556e064d7.tar.bz2 | |
re PR tree-optimization/22348 (Execution continues past end of for loop end condition with optimisation enabled)
PR tree-optimize/22348
* tree-ssa-loop-niter.c (number_of_iterations_cond):
Fold the partial computation.
* gcc.c-torture/execute/pr22348.c: New.
From-SVN: r102427
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/execute/pr22348.c | 15 | ||||
| -rw-r--r-- | gcc/tree-ssa-loop-niter.c | 2 |
4 files changed, 27 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 13c7a17..c6e2ad5 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,11 @@ 2005-07-27 Zdenek Dvorak <dvorakz@suse.cz> + PR tree-optimize/22348 + * tree-ssa-loop-niter.c (number_of_iterations_cond): + Fold the partial computation. + +2005-07-27 Zdenek Dvorak <dvorakz@suse.cz> + PR tree-optimization/22325 * tree-flow.h (compute_phi_arg_on_exit, force_expr_to_var_cost): Declare. diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 60889ca..0e3760d 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2005-07-27 Zdenek Dvorak <dvorakz@suse.cz> + + PR tree-optimize/22348 + * gcc.c-torture/execute/pr22348.c: New. + 2005-07-27 Richard Guenther <rguenther@suse.de> * gcc.dg/tree-ssa/salias-1.c: New testcase. diff --git a/gcc/testsuite/gcc.c-torture/execute/pr22348.c b/gcc/testsuite/gcc.c-torture/execute/pr22348.c new file mode 100644 index 0000000..9192d51 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/execute/pr22348.c @@ -0,0 +1,15 @@ +void abort (void); +void f(int i) +{ + if (i>4 + 3 * 16) + abort(); +} + +int main() +{ + unsigned int buflen, i; + buflen = 4 + 3 * 16; + for (i = 4; i < buflen; i+= 3) + f(i); + return 0; +} diff --git a/gcc/tree-ssa-loop-niter.c b/gcc/tree-ssa-loop-niter.c index 891dc0c..37cd400 100644 --- a/gcc/tree-ssa-loop-niter.c +++ b/gcc/tree-ssa-loop-niter.c @@ -275,7 +275,7 @@ number_of_iterations_cond (tree type, tree base0, tree step0, step = fold_unary_to_constant (NEGATE_EXPR, type, step1); else step = step0; - delta = build2 (MINUS_EXPR, type, base1, base0); + delta = fold_build2 (MINUS_EXPR, type, base1, base0); delta = fold_build2 (FLOOR_MOD_EXPR, type, delta, step); may_xform = boolean_false_node; |