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| author | bors <bors@rust-lang.org> | 2025-08-20 17:16:34 +0000 |
|---|---|---|
| committer | bors <bors@rust-lang.org> | 2025-08-20 17:16:34 +0000 |
| commit | 040a98af70f0a7da03f3d5356531b28a2a7a77e4 (patch) | |
| tree | 85c77e585d40a6871b8f9552234f5c784dfca8f0 /tests/codegen-llvm | |
| parent | e8a792daf500b5ff8097896ddb6cc037abe92487 (diff) | |
| parent | 8ea3b093819aabd92a605b42989341da0c97c0d6 (diff) | |
| download | rust-040a98af70f0a7da03f3d5356531b28a2a7a77e4.tar.gz rust-040a98af70f0a7da03f3d5356531b28a2a7a77e4.zip | |
Auto merge of #144086 - clubby789:alloc-zeroed, r=nikic
Pass `alloc-variant-zeroed` to LLVM Makes use of https://github.com/llvm/llvm-project/pull/138299 (once we pull in a version of LLVM with this attribute). ~~Unfortunately also requires https://github.com/llvm/llvm-project/pull/149336 to work.~~ Closes rust-lang/rust#104847
Diffstat (limited to 'tests/codegen-llvm')
| -rw-r--r-- | tests/codegen-llvm/vec-calloc.rs | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/tests/codegen-llvm/vec-calloc.rs b/tests/codegen-llvm/vec-calloc.rs index d1c320ead01..15971bbfa00 100644 --- a/tests/codegen-llvm/vec-calloc.rs +++ b/tests/codegen-llvm/vec-calloc.rs @@ -1,4 +1,6 @@ +//@ revisions: normal llvm21 //@ compile-flags: -Copt-level=3 -Z merge-functions=disabled +//@ [llvm21] min-llvm-version: 21 //@ only-x86_64 #![crate_type = "lib"] @@ -176,6 +178,24 @@ pub fn vec_option_i32(n: usize) -> Vec<Option<i32>> { vec![None; n] } +// LLVM21-LABEL: @vec_array +#[cfg(llvm21)] +#[no_mangle] +pub fn vec_array(n: usize) -> Vec<[u32; 1_000_000]> { + // LLVM21-NOT: call {{.*}}alloc::vec::from_elem + // LLVM21-NOT: call {{.*}}reserve + // LLVM21-NOT: call {{.*}}__rust_alloc( + + // LLVM21: call {{.*}}__rust_alloc_zeroed( + + // LLVM21-NOT: call {{.*}}alloc::vec::from_elem + // LLVM21-NOT: call {{.*}}reserve + // LLVM21-NOT: call {{.*}}__rust_alloc( + + // LLVM21: ret void + vec![[0; 1_000_000]; 3] +} + // Ensure that __rust_alloc_zeroed gets the right attributes for LLVM to optimize it away. // CHECK: declare noalias noundef ptr @{{.*}}__rust_alloc_zeroed(i64 noundef, i64 allocalign noundef) unnamed_addr [[RUST_ALLOC_ZEROED_ATTRS:#[0-9]+]] |