diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa-chrec/ssa-chrec-08.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa-chrec/ssa-chrec-08.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa-chrec/ssa-chrec-08.c b/gcc/testsuite/gcc.dg/tree-ssa-chrec/ssa-chrec-08.c new file mode 100644 index 00000000000..3d6eb7ba3b2 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa-chrec/ssa-chrec-08.c @@ -0,0 +1,31 @@ +/* { dg-do compile } */ +/* { dg-options "-O1 -ftree-elim-checks -fdump-tree-optimized" } */ + +void remove_me (void); + +int main(void) +{ + int a = -100; + int b = 2; + int c = 3; + int d = -5; + int e = 3; + int f = -100; + + while (a) + { + /* Exercises higher order polynomials. */ + a = a + b; /* a -> {-100, +, 2, +, 3, +, 4}_1 */ + b = b + c; /* b -> {2, +, 3, +, 4}_1 */ + c = c + 4; /* c -> {3, +, 4}_1 */ + + d = d + 4; /* d -> {-5, +, 4}_1 */ + e = e + d; /* e -> {3, +, -1, +, 4}_1 */ + f = f + e; /* f -> {-100, +, 2, +, 3, +, 4}_1 */ + + if (a != f) /* (a == f) -> {-98, +, 5, +, 7, +, 4}_1 */ + remove_me (); + } +} + +/* { dg-final { scan-tree-dump-times "remove_me" 0 "optimized"} } */ |