15 lines
373 B
Rust
15 lines
373 B
Rust
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// compile-flags: -O
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#![crate_type = "lib"]
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// CHECK-LABEL: @should_reserve_once
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#[no_mangle]
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pub fn should_reserve_once(v: &mut Vec<u8>) {
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// CHECK: tail call void @llvm.assume
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v.try_reserve(3).unwrap();
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// CHECK-NOT: call {{.*}}reserve
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// CHECK-NOT: call {{.*}}do_reserve_and_handle
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// CHECK-NOT: call {{.*}}__rust_alloc(
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v.extend([1, 2, 3]);
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}
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