diff options
| author | Bin Cheng <bin.cheng@arm.com> | 2015-12-01 05:22:16 +0000 |
|---|---|---|
| committer | Bin Cheng <amker@gcc.gnu.org> | 2015-12-01 05:22:16 +0000 |
| commit | cdf66caf4fa836a4398f74faceb373d84e019bb7 (patch) | |
| tree | b0feb2d5b46ce5a54088544843561463d10ac4f5 /gcc/testsuite/gcc.dg/tree-ssa/pr68529-2.c | |
| parent | 6ea98dee208bef31e56452969bfa7e85d0dd3c36 (diff) | |
| download | gcc-cdf66caf4fa836a4398f74faceb373d84e019bb7.zip gcc-cdf66caf4fa836a4398f74faceb373d84e019bb7.tar.gz gcc-cdf66caf4fa836a4398f74faceb373d84e019bb7.tar.bz2 | |
re PR tree-optimization/68529 (scev failed for while(i--))
PR tree-optimization/68529
* tree-ssa-loop-niter.c (number_of_iterations_ne): Add new param.
Compute no-overflow information for control iv.
(number_of_iterations_lt, number_of_iterations_le): Add new param.
(number_of_iterations_cond): Pass new argument to above functions.
PR tree-optimization/68529
* gcc.dg/tree-ssa/pr68529-1.c: New test.
* gcc.dg/tree-ssa/pr68529-2.c: New test.
* gcc.dg/tree-ssa/pr68529-3.c: New test.
From-SVN: r231097
Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa/pr68529-2.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/pr68529-2.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr68529-2.c b/gcc/testsuite/gcc.dg/tree-ssa/pr68529-2.c new file mode 100644 index 0000000..6d57618 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr68529-2.c @@ -0,0 +1,23 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -ftree-loop-distribution -ftree-loop-distribute-patterns -fdump-tree-ldist-details" } */ + +void bar(char *s); +int foo(unsigned short l) +{ + char c[10000] = {}; + unsigned short nchar = 9999; + + if (nchar <= l) + return -1; + + while(nchar-- != l) + { + c[nchar] = 'A'; + } + + bar (c); + return 0; +} + +/* { dg-final { scan-tree-dump "distributed: split to 0 loops and 1 library calls" "ldist" } } */ +/* { dg-final { scan-tree-dump "generated memset" "ldist" } } */ |