[all-commits] [llvm/llvm-project] f58114: check if operand is div in fold FDivSqrtDivisor (#...

[Zain Jaffal via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f5811494b0cde306e98caa339e4dc1c06cb5e8e9
      https://github.com/llvm/llvm-project/commit/f5811494b0cde306e98caa339e4dc1c06cb5e8e9
  Author: Zain Jaffal <zain at jjaffal.com>
  Date:   2024-03-09 (Sat, 09 Mar 2024)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp
    M llvm/test/Transforms/InstCombine/fdiv-sqrt.ll

  Log Message:
  -----------
  check if operand is div in fold FDivSqrtDivisor (#81970)

This patch fixes the issues introduced in
https://github.com/llvm/llvm-project/commit/bb5c3899d1936ebdf7ebf5ca4347ee2e057bee7f.

I moved the check for the instruction to be div before I check for the
fast math flags which resolves the crash in

```
float a, b;
double sqrt();
void c() { b = a / sqrt(a); }
```

---------

Co-authored-by: Matt Arsenault <arsenm2 at gmail.com>



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