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| author | Corey Farwell <coreyf@rwell.org> | 2020-12-31 23:27:33 -0500 |
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| committer | Corey Farwell <coreyf@rwell.org> | 2020-12-31 23:27:33 -0500 |
| commit | d482de30ea70d537dced8ec04a3903e3264cf106 (patch) | |
| tree | 67d6cd380ef7a66e785a54993bb0ca93b07b43ec /src/test/codegen/slice-ref-equality.rs | |
| parent | 26cc060756d0456b17fdc53ac5d34e7f7bdc873d (diff) | |
| parent | 99ad5a1a2824fea1ecf60068fd3636beae7ea2da (diff) | |
| download | rust-d482de30ea70d537dced8ec04a3903e3264cf106.tar.gz rust-d482de30ea70d537dced8ec04a3903e3264cf106.zip | |
Merge remote-tracking branch 'origin/master' into frewsxcv-san
Diffstat (limited to 'src/test/codegen/slice-ref-equality.rs')
| -rw-r--r-- | src/test/codegen/slice-ref-equality.rs | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/test/codegen/slice-ref-equality.rs b/src/test/codegen/slice-ref-equality.rs new file mode 100644 index 00000000000..acc7879e7b1 --- /dev/null +++ b/src/test/codegen/slice-ref-equality.rs @@ -0,0 +1,16 @@ +// compile-flags: -C opt-level=3 + +#![crate_type = "lib"] + +// #71602: check that slice equality just generates a single bcmp + +// CHECK-LABEL: @is_zero_slice +#[no_mangle] +pub fn is_zero_slice(data: &[u8; 4]) -> bool { + // CHECK: start: + // CHECK-NEXT: %{{.+}} = getelementptr {{.+}} + // CHECK-NEXT: %[[BCMP:.+]] = tail call i32 @{{bcmp|memcmp}}({{.+}}) + // CHECK-NEXT: %[[EQ:.+]] = icmp eq i32 %[[BCMP]], 0 + // CHECK-NEXT: ret i1 %[[EQ]] + *data == [0; 4] +} |