In preparing the back-end to move to ISLE, I detected a
number of codegen bugs in the existing code, which are
fixed here:
- Fix internal compiler error with uload16/icmp corner case.
- Fix broken Cls lowering.
- Correctly mask shift count for i8/i16 shifts.
In addition, I made several changes to operand encodings
in various MInst patterns. These should not have any
functional effect, but will make the ISLE migration easier:
- Encode floating-point constants as u32/u64 in MInst patterns.
- Encode shift amounts as u8 and Reg in ShiftOp pattern.
- Use MemArg in LoadMultiple64 and StoreMultiple64 patterns.
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