35 lines
1.0 KiB
Rust
35 lines
1.0 KiB
Rust
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// compile-flags: -O -C no-prepopulate-passes
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// min-llvm-version: 15.0 (for opaque pointers)
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// only-x86_64 (to not worry about usize differing)
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// ignore-debug (the debug assertions get in the way)
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#![crate_type = "lib"]
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#[no_mangle]
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// CHECK-LABEL: @replace_usize(
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pub fn replace_usize(r: &mut usize, v: usize) -> usize {
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// CHECK-NOT: alloca
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// CHECK: %[[R:.+]] = load i64, ptr %r
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// CHECK: store i64 %v, ptr %r
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// CHECK: ret i64 %[[R]]
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std::mem::replace(r, v)
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}
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#[no_mangle]
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// CHECK-LABEL: @replace_ref_str(
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pub fn replace_ref_str<'a>(r: &mut &'a str, v: &'a str) -> &'a str {
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// CHECK-NOT: alloca
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// CHECK: %[[A:.+]] = load ptr
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// CHECK: %[[B:.+]] = load i64
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// CHECK-NOT: store
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// CHECK-NOT: load
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// CHECK: store ptr
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// CHECK: store i64
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// CHECK-NOT: load
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// CHECK-NOT: store
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// CHECK: %[[P1:.+]] = insertvalue { ptr, i64 } poison, ptr %[[A]], 0
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// CHECK: %[[P2:.+]] = insertvalue { ptr, i64 } %[[P1]], i64 %[[B]], 1
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// CHECK: ret { ptr, i64 } %[[P2]]
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std::mem::replace(r, v)
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}
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