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8dcc676c92
We already did `Transmute`-then-`PtrToPtr`; this adds the nearly-identical `PtrToPtr`-then-`Transmute`.
It also adds `transmute(Foo(x))` → `transmute(x)`, when `Foo` is a single-field transparent type. That's useful for things like `NonNull { pointer: p }.as_ptr()`.
Found these as I was looking at MCP807-related changes.
39 lines
875 B
Diff
39 lines
875 B
Diff
- // MIR for `caller` before Inline
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+ // MIR for `caller` after Inline
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fn caller(_1: Box<[i32]>) -> () {
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debug x => _1;
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let mut _0: ();
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let _2: ();
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let mut _3: std::boxed::Box<[i32]>;
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let mut _4: *const [i32];
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bb0: {
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StorageLive(_2);
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StorageLive(_3);
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_3 = move _1;
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_4 = copy ((_3.0: std::ptr::Unique<[i32]>).0: std::ptr::NonNull<[i32]>) as *const [i32] (Transmute);
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_2 = callee(move (*_4)) -> [return: bb1, unwind: bb3];
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}
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bb1: {
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drop(_3) -> [return: bb2, unwind: bb4];
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}
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bb2: {
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StorageDead(_3);
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StorageDead(_2);
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_0 = const ();
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return;
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}
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bb3 (cleanup): {
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drop(_3) -> [return: bb4, unwind terminate(cleanup)];
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}
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bb4 (cleanup): {
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resume;
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}
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}
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