[llvm-branch-commits] [llvm] [DAGCombiner][GlobalISel] Prevent FMA contraction when fmul cannot be eliminated (FADD/FSUB pattern) (PR #188114)

[Matt Arsenault via llvm-branch-commits]

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@@ -6309,6 +6309,32 @@ static bool hasMoreUses(const MachineInstr &MI0, const MachineInstr &MI1,
                        MRI.use_instr_nodbg_end());
 }
 
+/// Check if all uses of a multiply can be contracted into FMA operations.
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arsenm wrote:

Does it really need to be all uses, or >= 2 uses enough? 

https://github.com/llvm/llvm-project/pull/188114