[llvm] Optimize fptrunc(x)>=C1 --> x>=C2 (PR #99475)

[Matt Arsenault via llvm-commits]

================
@@ -7882,6 +7892,79 @@ static Instruction *foldFCmpReciprocalAndZero(FCmpInst &I, Instruction *LHSI,
   return new FCmpInst(Pred, LHSI->getOperand(1), RHSC, "", &I);
 }
 
+// Fold trunc(x) < constant --> x < constant if possible.
----------------
arsenm wrote:

fptrunc, not trunc 

https://github.com/llvm/llvm-project/pull/99475