[llvm] relaxed simd fma (PR #147487)

[Luke Lau via llvm-commits]

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@@ -1542,6 +1542,29 @@ defm "" : SIMDMADD<F32x4, 0x105, 0x106, [HasRelaxedSIMD]>;
 defm "" : SIMDMADD<F64x2, 0x107, 0x108, [HasRelaxedSIMD]>;
 defm "" : SIMDMADD<F16x8, 0x14e, 0x14f, [HasFP16]>;
 
+def fmul_fast : PatFrag<(ops node:$a, node:$b), (fmul node:$a, node:$b),[{
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lukel97 wrote:

Actually it looks like ARMInstrInfo.td also defines fadd_contract. Maybe we should move that definition  into include/llvm/Target/TargetSelectionDAG.td + copy it for fmul_contract, that way we can share it between targets?

https://github.com/llvm/llvm-project/pull/147487