diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa/reassoc-1.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/reassoc-1.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/reassoc-1.c b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-1.c new file mode 100644 index 000000000..43ccd8eaa --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/reassoc-1.c @@ -0,0 +1,24 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-optimized" } */ + +int a, b, c, d; +extern int printf (const char *, ...); +int main(void) +{ + int e; + int f; + /* We should be able to transform these into the same expression, and only have two additions. */ + e = a + b; + e = e + c; + f = c + a; + f = f + b; + printf ("%d %d\n", e, f); +} + +/* We cannot reassociate these expressions because of undefined signed + integer overflow. Instead the value-numberer has to be extended + to canonicalize these expressions. */ + +/* { dg-final { scan-tree-dump-times "b.._. \\\+ a.._." 1 "optimized" { xfail *-*-* } } } */ +/* { dg-final { scan-tree-dump-times " \\\+ " 2 "optimized" { xfail *-*-* } } } */ +/* { dg-final { cleanup-tree-dump "optimized" } } */ |