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| author | Ben Kimock <kimockb@gmail.com> | 2024-07-24 19:12:50 -0400 |
|---|---|---|
| committer | Ben Kimock <kimockb@gmail.com> | 2024-07-25 15:14:42 -0400 |
| commit | a7d57aa7c8f42dda6d33e0ac349cf834eaf041b8 (patch) | |
| tree | 2ec95ebff75de2ac0d843ac244c12ab660baa0b2 /tests/codegen/clone-shims.rs | |
| parent | 92c6c03805408a1a261b98013304e9bbf59ee428 (diff) | |
| download | rust-a7d57aa7c8f42dda6d33e0ac349cf834eaf041b8.tar.gz rust-a7d57aa7c8f42dda6d33e0ac349cf834eaf041b8.zip | |
Let InstCombine remove Clone shims inside Clone shims
Co-authored-by: scottmcm <scottmcm@users.noreply.github.com>
Diffstat (limited to 'tests/codegen/clone-shims.rs')
| -rw-r--r-- | tests/codegen/clone-shims.rs | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/tests/codegen/clone-shims.rs b/tests/codegen/clone-shims.rs new file mode 100644 index 00000000000..06c959f9ee7 --- /dev/null +++ b/tests/codegen/clone-shims.rs @@ -0,0 +1,15 @@ +// Clone shims for aggregates are generated by just calling the Clone shims for all their members. +// Those calls generate a lot of unnecessary IR if the members are Copy. This test ensures that we +// optimize away those inner calls without needing to inline them. + +//@ compile-flags: -Cno-prepopulate-passes -Csymbol-mangling-version=v0 -Zinline-mir=no +#![crate_type = "lib"] + +pub type Test = (i32, i32, *const i32); +pub static TEST: fn(&Test) -> Test = <Test as core::clone::Clone>::clone; + +// CHECK-NOT: call <i32 as core::clone::Clone>::clone +// CHECK-NOT: call <*const i32 as core::clone::Clone>::clone +// CHECK: ; <(i32, i32, *const i32) as core::clone::Clone>::clone +// CHECK-NOT: call <i32 as core::clone::Clone>::clone +// CHECK-NOT: call <*const i32 as core::clone::Clone>::clone |