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Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa-chrec/ssa-chrec-01.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa-chrec/ssa-chrec-01.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa-chrec/ssa-chrec-01.c b/gcc/testsuite/gcc.dg/tree-ssa-chrec/ssa-chrec-01.c new file mode 100644 index 00000000000..f293f9b8c37 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa-chrec/ssa-chrec-01.c @@ -0,0 +1,35 @@ +/* { dg-do compile } */ +/* { dg-options "-O1 -fscalar-evolutions -fdump-tree-scev-details" } */ + +int main(void) +{ + unsigned a; + int b; + int c; + + /* loop_1 runs exactly 4 times. */ + for (a = 22; a < 50; a+=1) + { + /* loop_2 runs exactly 6 times. On exit, the variable B is equal to 53. */ + for (b = 23; b < 50; b+=5) + { + ++a; + + /* loop_3 runs {{77, +, -7}_1, +, -1}_2 times. */ + for (c = a; c < 100; c++) + { + + } + } + } +} + +/* The analyzer has to detect the following evolution functions: + b -> {23, +, 5}_2 + a -> {{22, +, 7}_1, +, 1}_2 + c -> {{{23, +, 7}_1, +, 1}_2, +, 1}_3 +*/ +/* { dg-final { scan-tree-dump-times "nb_iterations 4" 1 "scev"} } */ +/* { dg-final { scan-tree-dump-times "nb_iterations 6" 1 "scev"} } */ + + |