bitops: fix -fsanitize=undefined warning:

```
/home/rusty/devel/cvs/ccan/ccan/bitops/test/run.c:28:3: runtime error: left shift of 1 by 31 places cannot be represented in type 'int'

bitops: Module's run and api tests pass (tests_pass): FAIL (+1/2)
/home/rusty/devel/cvs/ccan/ccan/bitops/test/run.c:1..632
```

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

diff --git a/ccan/bitops/test/run.c b/ccan/bitops/test/run.c
index 5dba932d4799af3b61134a0eb3ecd6d135e18b8e..6bb3acf5037173a328fa50b0c6b120dc310f8d82 100644 (file)
--- a/ccan/bitops/test/run.c
+++ b/ccan/bitops/test/run.c
@@ -10,7 +10,7 @@ int main(void)
        plan_tests(68 + 6 * (31 + 63));
 
        for (i = 0; i < 32; i++)
-               ok1(bitops_ffs32(1 << i) == i+1);
+               ok1(bitops_ffs32(1U << i) == i+1);
        ok1(bitops_ffs32(0) == 0);
        for (i = 0; i < 64; i++)
                ok1(bitops_ffs64((uint64_t)1 << i) == i+1);
@@ -25,19 +25,19 @@ int main(void)
        ok1(bitops_ffs64(0) == 0);
 
        for (i = 0; i < 32; i++)
-               ok1(bitops_clz32(1 << i) == 31 - i);
+               ok1(bitops_clz32(1U << i) == 31 - i);
        for (i = 0; i < 64; i++)
                ok1(bitops_clz64((uint64_t)1 << i) == 63 - i);
 
        /* Lower bits don't effect results */
        for (i = 0; i < 32; i++)
-               ok1(bitops_clz32((1 << i) + (1 << i)-1) == 31 - i);
+               ok1(bitops_clz32((1U << i) + (1U << i)-1) == 31 - i);
        for (i = 0; i < 64; i++)
                ok1(bitops_clz64(((uint64_t)1 << i) + ((uint64_t)1 << i)-1)
                    == 63 - i);
 
        for (i = 0; i < 32; i++)
-               ok1(bitops_ctz32(1 << i) == i);
+               ok1(bitops_ctz32(1U << i) == i);
        for (i = 0; i < 64; i++)
                ok1(bitops_ctz64((uint64_t)1 << i) == i);