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Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa-chrec/ssa-chrec-41.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa-chrec/ssa-chrec-41.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa-chrec/ssa-chrec-41.c b/gcc/testsuite/gcc.dg/tree-ssa-chrec/ssa-chrec-41.c new file mode 100644 index 00000000000..f8c0cd0ca20 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa-chrec/ssa-chrec-41.c @@ -0,0 +1,52 @@ +/* { dg-do compile } */ +/* { dg-options "-O1 -fscalar-evolutions -fdump-tree-scev-details" } */ + + +int main () +{ + int a = 2; + int b = 4; + int c = 2; + + while (a) + { + a *= 3; + for (c = -10; c < 0; c++) + { + /* Exercises the build_exponential_evolution_in_loop function in the following context: + (multiply_evolution + loop_num = 2 + chrec_before = {2, *, 3}_1 + to_mult = {4, *, 5}_1 + res = {{2, *, 3}_1, *, {4, *, 5}_1}_2 + ) + + Then it exerces the chrec_apply in the following context: + (chrec_apply + var = 2 + chrec = {0, +, {4, *, 5}_1}_2 + x = 10 + res = {40, *, 5}_1 + ) + + Finally it tests the + (add_to_evolution + loop_num = 1 + chrec_before = {{2, *, 3}_1, *, {4, *, 5}_1}_2 + to_add = {40, *, 5}_1 + res = {{2, *, {120, *, 5}_1}_1, *, {4, *, 5}_1}_2 + ) + */ + a *= b; + } + b *= 5; + } +} + +/* + c -> {-10, +, 1}_2 + b -> {4, *, 5}_1 + a -> {{2, *, {120, *, 5}_1}_1, *, {4, *, 5}_1}_2 +*/ + +/* FIXME. */ |