diff options
Diffstat (limited to 'src/test/ui/numbers-arithmetic/overflowing-lsh-4.rs')
-rw-r--r-- | src/test/ui/numbers-arithmetic/overflowing-lsh-4.rs | 24 |
1 files changed, 0 insertions, 24 deletions
diff --git a/src/test/ui/numbers-arithmetic/overflowing-lsh-4.rs b/src/test/ui/numbers-arithmetic/overflowing-lsh-4.rs deleted file mode 100644 index 1042bfcb3..000000000 --- a/src/test/ui/numbers-arithmetic/overflowing-lsh-4.rs +++ /dev/null @@ -1,24 +0,0 @@ -// build-fail -// compile-flags: -C debug-assertions - -// This function is checking that our automatic truncation does not -// sidestep the overflow checking. - -#![deny(arithmetic_overflow)] - -fn main() { - // this signals overflow when checking is on - let x = 1_i8 << 17; - //~^ ERROR: this arithmetic operation will overflow - - // ... but when checking is off, the fallback will truncate the - // input to its lower three bits (= 1). Note that this is *not* - // the behavior of the x86 processor for 8- and 16-bit types, - // but it is necessary to avoid undefined behavior from LLVM. - // - // We check that here, by ensuring the result has only been - // shifted by one place; if overflow checking is turned off, then - // this assertion will pass (and the compiletest driver will - // report that the test did not produce the error expected above). - assert_eq!(x, 2_i8); -} |