4 commits

Author	SHA1	Message	Date
Scott McMurray	b421a56364	Make the aggregate-then-transmute handling more general	2025-01-08 18:46:31 -08:00
Scott McMurray	293f8e8941	Refactor the cast-then-cast cases together, and support transmute-then-transmute	2025-01-08 18:46:30 -08:00
Scott McMurray	03650dd029	Use layout information to detect transparent transmutes	2025-01-08 18:46:30 -08:00
Scott McMurray	8dcc676c92	[mir-opt] GVN some more transmute cases ... 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.	2025-01-08 18:46:30 -08:00