Commits on Oct 19, 2024

1. [loongarch][DAG][FREEZE] Fix crash when FREEZE a half(f16) type on lo… …

   …ongarch (llvm#107791)
   
   For zig with LLVM 19.1.0rc4, we are seeing the following error when
   bootstrapping a `loongarch64-linux-musl` target.
   
   ziglang/zig-bootstrap#164 (comment)
   
   It seems that this issue is caused by `PromoteFloatResult` is not
   handling FREEZE OP on loongarch.
   
   Here is the reproduction of the error: https://godbolt.org/z/PPfvWjjG5
   
   ~~This patch adds the FREEZE OP handling with `PromoteFloatRes_UnaryOp`
   and adds a test case.~~
   
   This patch changes loongarch's way of floating point promotion to soft
   promotion to avoid this problem.
   
   See: loongarch's handling of `half`:
   - llvm#93894
   - llvm#94456
   
   Also see: other float promotion FREEZE handling
   -
   llvm@0019c2f
   
   (cherry picked from commit 13280d9)

   

   yxd-ym authored and heiher committed Oct 19, 2024
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