cc7d8014d7
Because after PR 86041, the optimizer no longer load-merges at the LLVM IR level, which might be part of the perf loss. (I'll run perf and see if this makes a difference.) Also I added a codegen test so this hopefully won't regress in future -- it passes on stable and with my change here, but not on the 2021-11-09 nightly.
15 lines
302 B
Rust
15 lines
302 B
Rust
// compile-flags: -O
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#![crate_type = "lib"]
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// CHECK-LABEL: @array_clone
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#[no_mangle]
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pub fn array_clone(a: &[u8; 2]) -> [u8; 2] {
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// CHECK-NOT: getelementptr
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// CHECK-NOT: load i8
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// CHECK-NOT: zext
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// CHECK-NOT: shl
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// CHECK: load i16
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// CHECK-NEXT: ret i16
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a.clone()
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}
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