37 lines
1.1 KiB
Rust
37 lines
1.1 KiB
Rust
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//@ compile-flags: -C opt-level=3 -Z merge-functions=disabled
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#![crate_type = "lib"]
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//! Make sure str::to_string is specialized not to use fmt machinery.
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// CHECK-LABEL: define {{(dso_local )?}}void @one_ref
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#[no_mangle]
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pub fn one_ref(input: &str) -> String {
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// CHECK-NOT: {{(call|invoke).*}}fmt
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input.to_string()
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}
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// CHECK-LABEL: define {{(dso_local )?}}void @two_ref
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#[no_mangle]
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pub fn two_ref(input: &&str) -> String {
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// CHECK-NOT: {{(call|invoke).*}}fmt
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input.to_string()
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}
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// CHECK-LABEL: define {{(dso_local )?}}void @thirteen_ref
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#[no_mangle]
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pub fn thirteen_ref(input: &&&&&&&&&&&&&str) -> String {
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// CHECK-NOT: {{(call|invoke).*}}fmt
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input.to_string()
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}
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// This is a known performance cliff because of the macro-generated
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// specialized impl. If this test suddenly starts failing,
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// consider removing the `to_string_str!` macro in `alloc/str/string.rs`.
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//
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// CHECK-LABEL: define {{(dso_local )?}}void @fourteen_ref
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#[no_mangle]
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pub fn fourteen_ref(input: &&&&&&&&&&&&&&str) -> String {
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// CHECK: {{(call|invoke).*}}fmt
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input.to_string()
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}
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