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Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa-chrec/ssa-chrec-54.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa-chrec/ssa-chrec-54.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa-chrec/ssa-chrec-54.c b/gcc/testsuite/gcc.dg/tree-ssa-chrec/ssa-chrec-54.c new file mode 100644 index 00000000000..9dfc15b642f --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa-chrec/ssa-chrec-54.c @@ -0,0 +1,33 @@ +/* { dg-do compile } */ +/* { dg-options "-O1 -fscalar-evolutions -fdump-tree-scev-details" } */ + +int main(void) +{ + int a = 5; + int b = 6; + int c = 20; + + while (a <= 100) + { + int i; + + a = b; + for (i = 0; i <= 12; i++) + { + a++; + } + b = b + c; + } +} + +/* This example has been distilled from Pattern1 that cannot be + handled: "Big steps, small steps" from the ICS'01 paper "Monotonic + Evolution" by Peng Wu. + + The analyzer has to detect the following evolution functions: + i -> {0, +, 1}_2 + b -> {6, +, 20}_1 + a -> {{6, +, 20}_1, +, 1}_2 +*/ + +/* FIXME. */ |