diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa/pr20657.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/pr20657.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr20657.c b/gcc/testsuite/gcc.dg/tree-ssa/pr20657.c new file mode 100644 index 000000000..1c3dbf9fd --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr20657.c @@ -0,0 +1,18 @@ +/* PR tree-optimization/20657 + VRP did not pick up a conditional equivalence from the first "if" + statement, which was needed to eliminate the second "if" statement. */ + +/* { dg-do compile } */ +/* { dg-options "-O2 -fno-tree-dominator-opts -fdump-tree-vrp1-details" } */ + +int +foo (int a) +{ + if (a == 0) + if (a == 0) + return 1; + return 0; +} + +/* { dg-final { scan-tree-dump-times "Folding predicate" 1 "vrp1"} } */ +/* { dg-final { cleanup-tree-dump "vrp1" } } */ |