[llvm] [RISCV][GISel] Add calling convention support for half (PR #94110)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

> Hi @dtcxzyw
> 
> If you compile with EXPENSIVE_CHECKS on and run the new testcase CodeGen/RISCV/GlobalISel/irtranslator/calling-conv-half.ll it fails with
> 
> ```
> *** Bad machine code: Copy Instruction is illegal with mismatching sizes ***
> - function:    caller_half_return_stack2
> - basic block: %bb.1  (0x55852fd10918)
> - instruction: $x10 = COPY %0:_(s16)
> Def Size = 32, Src Size = 16
> LLVM ERROR: Found 1 machine code errors.
> ```
> 
> Can also be seen if you just add `-verify-machineinstrs` to the last RUN line in the testcase.

Thank you! I will have a look.


https://github.com/llvm/llvm-project/pull/94110