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https://github.com/rust-lang/rust
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e489971902
A definition does not dominate a use in the same statement. For example in MIR generated for compound assignment x += a (when overflow checks are disabled).
20 lines
553 B
Rust
20 lines
553 B
Rust
// build-pass
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// compile-flags: --crate-type=lib
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#![feature(custom_mir, core_intrinsics)]
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use std::intrinsics::mir::*;
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#[custom_mir(dialect = "runtime", phase = "optimized")]
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pub fn f(a: u32) -> u32 {
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mir!(
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let x: u32;
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{
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// Previously code generation failed with ICE "use of .. before def ..." because the
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// definition of x was incorrectly identified as dominating the use of x located in the
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// same statement:
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x = x + a;
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RET = x;
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Return()
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}
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)
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}
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