[llvm] [InstCombine] Transform high latency, dependent FSQRT/FDIV into FMUL (PR #87474)

[Nikita Popov via llvm-commits]

================
@@ -626,6 +626,129 @@ Instruction *InstCombinerImpl::foldPowiReassoc(BinaryOperator &I) {
   return nullptr;
 }
 
+static bool isFSqrtDivToFMulLegal(Instruction *X,
+                                  SmallSetVector<Instruction *, 2> &R1,
+                                  SmallSetVector<Instruction *, 2> &R2) {
----------------
nikic wrote:

Doesn't look like these are modified? Pass by const ref?

https://github.com/llvm/llvm-project/pull/87474