[PATCH] D146786: [CodeGenPrepare][RISCV] Correct the MathUsed flag for shouldFormOverflowOp

[Craig Topper via Phabricator via llvm-commits]

craig.topper updated this revision to Diff 508164.
craig.topper added a comment.

Restore old code structure.
Check 1 use instead of 2 for sub. That's safer in case of a dead sub instruction.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D146786/new/

https://reviews.llvm.org/D146786

Files:
  llvm/lib/CodeGen/CodeGenPrepare.cpp
  llvm/test/CodeGen/RISCV/overflow-intrinsics.ll

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