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| author | Scott McMurray <scottmcm@users.noreply.github.com> | 2023-10-06 01:17:09 -0700 |
|---|---|---|
| committer | Scott McMurray <scottmcm@users.noreply.github.com> | 2023-10-07 00:10:32 -0700 |
| commit | ae9cec58394d7a38aac17e2873d213d5fcd85f7a (patch) | |
| tree | 694b6a4b46ac6aefff6c1c6e85478270ea0ffa0b /tests/codegen/array-codegen.rs | |
| parent | 579be69de9f98f56d92b93820eaf7e6b06b517a5 (diff) | |
| download | rust-ae9cec58394d7a38aac17e2873d213d5fcd85f7a.tar.gz rust-ae9cec58394d7a38aac17e2873d213d5fcd85f7a.zip | |
Copy 1-element arrays as scalars, not vectors
For `[T; 1]` it's silly to copy as `<1 x T>` when we can just copy as `T`.
Diffstat (limited to 'tests/codegen/array-codegen.rs')
| -rw-r--r-- | tests/codegen/array-codegen.rs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/tests/codegen/array-codegen.rs b/tests/codegen/array-codegen.rs index ba0d444f97e..bf5ae74679b 100644 --- a/tests/codegen/array-codegen.rs +++ b/tests/codegen/array-codegen.rs @@ -32,3 +32,25 @@ pub fn array_copy(a: &[u8; 4], p: &mut [u8; 4]) { // CHECK: store <4 x i8> %[[TEMP2]], ptr %p, align 1 *p = *a; } + +// CHECK-LABEL: @array_copy_1_element +#[no_mangle] +pub fn array_copy_1_element(a: &[u8; 1], p: &mut [u8; 1]) { + // CHECK: %[[LOCAL:.+]] = alloca [1 x i8], align 1 + // CHECK: %[[TEMP1:.+]] = load i8, ptr %a, align 1 + // CHECK: store i8 %[[TEMP1]], ptr %[[LOCAL]], align 1 + // CHECK: %[[TEMP2:.+]] = load i8, ptr %[[LOCAL]], align 1 + // CHECK: store i8 %[[TEMP2]], ptr %p, align 1 + *p = *a; +} + +// CHECK-LABEL: @array_copy_2_elements +#[no_mangle] +pub fn array_copy_2_elements(a: &[u8; 2], p: &mut [u8; 2]) { + // CHECK: %[[LOCAL:.+]] = alloca [2 x i8], align 1 + // CHECK: %[[TEMP1:.+]] = load <2 x i8>, ptr %a, align 1 + // CHECK: store <2 x i8> %[[TEMP1]], ptr %[[LOCAL]], align 1 + // CHECK: %[[TEMP2:.+]] = load <2 x i8>, ptr %[[LOCAL]], align 1 + // CHECK: store <2 x i8> %[[TEMP2]], ptr %p, align 1 + *p = *a; +} |