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bc7986ec79
Emit `#[rustc_allocator]` etc. attributes on the functions generated by the `#[global_allocator]` macro, which will emit LLVM attributes like `"alloc-family"`. If the module with the global allocator participates in LTO, this ensures that the attributes typically emitted on the allocator declarations are not lost if the definition is imported.
42 lines
1.9 KiB
Rust
42 lines
1.9 KiB
Rust
//@ compile-flags: -C opt-level=3
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#![crate_type = "lib"]
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mod foobar {
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use std::alloc::{GlobalAlloc, Layout};
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struct Allocator;
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unsafe impl GlobalAlloc for Allocator {
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unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
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// CHECK-LABEL: ; __rustc::__rust_alloc
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// CHECK-NEXT: ; Function Attrs: {{.*}}allockind("alloc,uninitialized,aligned") allocsize(0){{.*}}
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// CHECK-NEXT: define{{.*}} noalias{{.*}} ptr @{{.*}}__rust_alloc(i[[SIZE:[0-9]+]] {{.*}}%size, i[[SIZE]] allocalign{{.*}} %align)
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panic!()
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}
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unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) {
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// CHECK-LABEL: ; __rustc::__rust_dealloc
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// CHECK-NEXT: ; Function Attrs: {{.*}}allockind("free"){{.*}}
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// CHECK-NEXT: define{{.*}} void @{{.*}}__rust_dealloc(ptr allocptr{{.*}} %ptr, i[[SIZE]] {{.*}} %size, i[[SIZE]] {{.*}} %align)
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panic!()
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}
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unsafe fn realloc(&self, ptr: *mut u8, layout: Layout, new_size: usize) -> *mut u8 {
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// CHECK-LABEL: ; __rustc::__rust_realloc
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// CHECK-NEXT: ; Function Attrs: {{.*}}allockind("realloc,aligned") allocsize(3){{.*}}
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// CHECK-NEXT: define{{.*}} noalias{{.*}} ptr @{{.*}}__rust_realloc(ptr allocptr{{.*}} %ptr, i[[SIZE]] {{.*}} %size, i[[SIZE]] allocalign{{.*}} %align, i[[SIZE]] {{.*}} %new_size)
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panic!()
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}
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unsafe fn alloc_zeroed(&self, layout: Layout) -> *mut u8 {
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// CHECK-LABEL: ; __rustc::__rust_alloc_zeroed
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// CHECK-NEXT: ; Function Attrs: {{.*}}allockind("alloc,zeroed,aligned") allocsize(0){{.*}}
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// CHECK-NEXT: define{{.*}} noalias{{.*}} ptr @{{.*}}__rust_alloc_zeroed(i[[SIZE]] {{.*}} %size, i[[SIZE]] allocalign{{.*}} %align)
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panic!()
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}
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}
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#[global_allocator]
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static GLOBAL: Allocator = Allocator;
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}
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