diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa/loop-2.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/loop-2.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/loop-2.c b/gcc/testsuite/gcc.dg/tree-ssa/loop-2.c new file mode 100644 index 000000000..342682778 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/loop-2.c @@ -0,0 +1,44 @@ +/* A test for strength reduction and induction variable elimination. */ + +/* { dg-do compile } */ +/* { dg-options "-O1 -fdump-tree-optimized" } */ +/* { dg-require-effective-target size32plus } */ + +/* Size of this structure should be sufficiently weird so that no memory + addressing mode applies. */ + +struct bla +{ + char x[187]; + int y; + char z[253]; +} arr_base[100]; + +void xxx(void) +{ + int iter; + + for (iter = 0; iter < 100; iter++) + arr_base[iter].y = 17 * iter; +} + +/* Access to arr_base[iter].y should be strength reduced, i.e., there should + be no multiplication. */ + +/* { dg-final { scan-tree-dump-times " \\* \[^\\n\\r\]*=" 0 "optimized" } } */ +/* { dg-final { scan-tree-dump-times "\[^\\n\\r\]*= \\* " 0 "optimized" } } */ +/* { dg-final { scan-tree-dump-times "MEM" 1 "optimized" } } */ + +/* 17 * iter should be strength reduced. */ + +/* { dg-final { scan-tree-dump-times " \\* 17" 0 "optimized" } } */ +/* { dg-final { scan-tree-dump-times " \\+ 17" 1 "optimized" } } */ + +/* The induction variable comparison with 99 should be eliminated + and replaced by comparison of one of the newly created ivs. */ + +/* { dg-final { scan-tree-dump-times "iter" 0 "optimized" } } */ +/* { dg-final { scan-tree-dump-times "= 99" 0 "optimized" } } */ +/* { dg-final { scan-tree-dump-times "< 100" 0 "optimized" } } */ + +/* { dg-final { cleanup-tree-dump "optimized" } } */ |