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Signed-off-by: Yuki Okushi <jtitor@2k36.org>
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src/test/codegen/issue-86106.rs

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@@ -1,27 +1,26 @@
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// min-llvm-version: 15.0
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// compile-flags: -C opt-level=3 -C target-cpu=native
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// compile-flags: -C opt-level=3
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// The below two functions ensure that both `String::new()` and `"".to_string()`
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// produce the identical code.
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#![crate_type = "lib"]
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// CHECK-LABEL: @string_new = unnamed_addr alias void (ptr), ptr @empty_to_string
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// CHECK: define void @empty_to_string
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#[no_mangle]
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pub fn string_new() -> String {
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String::new()
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}
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// CHECK-LABEL: define void @empty_to_string
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#[no_mangle]
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pub fn empty_to_string() -> String {
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// CHECK-NOT: load i8
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// CHECK: store i64
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// CHECK: store i{{32|64}}
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// CHECK-NEXT: getelementptr
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// CHECK-NEXT: store ptr
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// CHECK-NEXT: getelementptr
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// CHECK-NOT: store i8
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// CHECK-NEXT: store i64
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// CHECK-NEXT: store i{{32|64}}
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// CHECK-NEXT: ret void
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"".to_string()
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}
@@ -32,25 +31,25 @@ pub fn empty_to_string() -> String {
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// CHECK-LABEL: @empty_vec
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#[no_mangle]
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pub fn empty_vec() -> Vec<u8> {
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// CHECK: store i64
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// CHECK: store i{{32|64}}
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// CHECK-NOT: load i8
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// CHECK-NEXT: getelementptr
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// CHECK-NEXT: store ptr
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// CHECK-NEXT: getelementptr
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// CHECK-NEXT: store i64
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// CHECK-NEXT: store i{{32|64}}
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// CHECK-NEXT: ret void
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vec![]
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}
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// CHECK-LABEL: @empty_vec_clone
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#[no_mangle]
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pub fn empty_vec_clone() -> Vec<u8> {
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// CHECK: store i64
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// CHECK: store i{{32|64}}
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// CHECK-NOT: load i8
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// CHECK-NEXT: getelementptr
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// CHECK-NEXT: store ptr
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// CHECK-NEXT: getelementptr
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// CHECK-NEXT: store i64
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// CHECK-NEXT: store i{{32|64}}
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// CHECK-NEXT: ret void
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vec![].clone()
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}

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