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This commit adds a new test file 'array-from_fn.rs' to the codegen test suite. The test checks the behavior of std::array::from_fn under different optimization levels: 1. At opt-level=0 (debug build), it verifies that the core::array::Guard is present in the generated code. 2. At opt-level=s (size optimization), it ensures that the Guard is optimized out. This test helps ensure that the compiler correctly optimizes array::from_fn calls in release builds while maintaining safety checks in debug builds.
14 lines
339 B
Rust
14 lines
339 B
Rust
//@ revisions: NORMAL OPT
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//@ [NORMAL] compile-flags: -C opt-level=0 -C debuginfo=2
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//@ [OPT] compile-flags: -C opt-level=s -C debuginfo=0
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#![crate_type = "lib"]
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#![feature(array_from_fn)]
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#[no_mangle]
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pub fn iota() -> [u8; 16] {
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// OPT-NOT: core..array..Guard
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// NORMAL: core..array..Guard
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std::array::from_fn(|i| i as _)
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}
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