diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/loop-8.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/loop-8.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/loop-8.c b/gcc/testsuite/gcc.dg/loop-8.c new file mode 100644 index 00000000000..592e54cf417 --- /dev/null +++ b/gcc/testsuite/gcc.dg/loop-8.c @@ -0,0 +1,24 @@ +/* { dg-do compile } */ +/* { dg-options "-O1 -fdump-rtl-loop2_invariant" } */ + +void +f (int *a, int *b) +{ + int i; + + for (i = 0; i < 100; i++) + { + int d = 42; + + a[i] = d; + if (i % 2) + d = i; + b[i] = d; + } +} + +/* Load of 42 is moved out of the loop, introducing a new pseudo register. */ +/* { dg-final { scan-rtl-dump-times "Decided" 1 "loop2_invariant" } } */ +/* { dg-final { scan-rtl-dump-not "without introducing a new temporary register" "loop2_invariant" } } */ +/* { dg-final { cleanup-rtl-dump "loop2_invariant" } } */ + |