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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
commit | 64d98f8ee037282c35007b64c2649055c56af1db (patch) | |
tree | 5492bcf97fce41ee1c0b1cc2add283f3e66cdab0 /tests/ui/consts/const-int-arithmetic-overflow.rs | |
parent | Adding debian version 1.67.1+dfsg1-1. (diff) | |
download | rustc-64d98f8ee037282c35007b64c2649055c56af1db.tar.xz rustc-64d98f8ee037282c35007b64c2649055c56af1db.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/consts/const-int-arithmetic-overflow.rs')
-rw-r--r-- | tests/ui/consts/const-int-arithmetic-overflow.rs | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/tests/ui/consts/const-int-arithmetic-overflow.rs b/tests/ui/consts/const-int-arithmetic-overflow.rs new file mode 100644 index 000000000..6446e9451 --- /dev/null +++ b/tests/ui/consts/const-int-arithmetic-overflow.rs @@ -0,0 +1,25 @@ +// run-pass +// compile-flags: -O + +// Make sure arithmetic unary/binary ops actually return the right result, even when overflowing. +// We have to put them in `const fn` and turn on optimizations to avoid overflow checks. + +const fn add(x: i8, y: i8) -> i8 { x+y } +const fn sub(x: i8, y: i8) -> i8 { x-y } +const fn mul(x: i8, y: i8) -> i8 { x*y } +// div and rem are always checked, so we cannot test their result in case of overflow. +const fn neg(x: i8) -> i8 { -x } + +fn main() { + const ADD_OFLOW: i8 = add(100, 100); + assert_eq!(ADD_OFLOW, -56); + + const SUB_OFLOW: i8 = sub(100, -100); + assert_eq!(SUB_OFLOW, -56); + + const MUL_OFLOW: i8 = mul(-100, -2); + assert_eq!(MUL_OFLOW, -56); + + const NEG_OFLOW: i8 = neg(-128); + assert_eq!(NEG_OFLOW, -128); +} |