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Remove overflow checks from ConstProp.

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This commit is contained in:
Camille GILLOT 2023-02-08 20:28:39 +00:00
commit e34caaf42d
8 changed files with 88 additions and 116 deletions
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7
tests/mir-opt/dataflow-const-prop/inherit_overflow.rs
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@ -1,8 +1,9 @@
// compile-flags: -Zunsound-mir-opts
// unit-test: DataflowConstProp
// compile-flags: -Zmir-enable-passes=+Inline
// EMIT_MIR inherit_overflow.main.DataflowConstProp.diff
fn main() {
// After inlining, this will contain a `CheckedBinaryOp`. The overflow
// must be ignored by the constant propagation to avoid triggering a panic.
// After inlining, this will contain a `CheckedBinaryOp`.
// Propagating the overflow is ok as codegen will just skip emitting the panic.
let _ = <u8 as std::ops::Add>::add(255, 1);
}