[PATCH] D143646: [RISCV] Return false from shouldFormOverflowOp

[Liao Chunyu via Phabricator via llvm-commits]

liaolucy added inline comments.


================
Comment at: llvm/test/CodeGen/RISCV/overflow-intrinsics.ll:87
   store i64 %add, ptr %res
   ret i64 %Q
 }
----------------
This can be optimized in riscv DAG combine. I'll write another patch.
to:
```
  %add = add i64 %b, %a
  %cmp = icmp ult i64 %b, 0
  %Q = select i1 %cmp, i64 %b, i64 42
  store i64 %add, ptr %res
```


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D143646/new/

https://reviews.llvm.org/D143646