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Rollup merge of rust-lang#134073 - DianQK:fix-131227, r=oli-obk dataflow_const_prop: do not eval a ptr address in SwitchInt Fixes rust-lang#131227.
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tests/ui/dataflow_const_prop/ptr-in-switch-int-issue-131227.rs
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//! Issue: <https://github.com/rust-lang/rust/issues/131227> | ||
//! Test that constant propagation in SwitchInt does not crash | ||
//! when encountering a ptr-to-int transmute. | ||
//@ check-pass | ||
//@ compile-flags: -Zmir-enable-passes=+InstSimplify-before-inline,+DataflowConstProp | ||
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#![crate_type = "lib"] | ||
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static mut G: i32 = 0; | ||
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pub fn myfunc() -> i32 { | ||
let var = &raw mut G; | ||
let u: usize = unsafe { std::mem::transmute(var) }; | ||
match u { | ||
0 => 0, | ||
_ => 1, | ||
} | ||
} |