diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa/loop-3.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/loop-3.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/loop-3.c b/gcc/testsuite/gcc.dg/tree-ssa/loop-3.c new file mode 100644 index 00000000000..67846f40b11 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/loop-3.c @@ -0,0 +1,27 @@ +/* A test for strength reduction and induction variable elimination. + Target is restricted to x86 type architectures, so that we may + assume something about memory addressing modes. */ + +/* { dg-do compile { target i?86-*-* x86_64-*-* } } */ +/* { dg-options "-O1 -fdump-tree-vars" } */ + +int arr_base[100]; + +int foo(int); + +void xxx(void) +{ + int iter; + + for (iter = 0; iter < 100; iter++) + arr_base[iter] = foo (iter); +} + +/* Access to arr_base[iter].y should not be strength reduced, since + we have a memory mode including multiplication by 4. */ + +/* { dg-final { scan-tree-dump-times "arr_base.*=" 1 "vars" } } */ + +/* And original induction variable should be preserved. */ + +/* { dg-final { scan-tree-dump-times "int iter" 1 "vars" } } */ |
