[llvm] [AMDGPU] Set hasSideEffects=0 for SALU psuedos (PR #134487)

[Pierre van Houtryve via llvm-commits]

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@@ -340,19 +340,27 @@ def S_SUB_U64_PSEUDO : SPseudoInstSI <
 
 def S_ADD_CO_PSEUDO : SPseudoInstSI <
   (outs SReg_32:$sdst, SSrc_i1:$scc_out), (ins SSrc_b32:$src0, SSrc_b32:$src1, SSrc_i1:$scc_in)
->;
+>{
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Pierre-vh wrote:

nit: use ` let hasSideEffects=0 in { .. }` to avoid repetition?

https://github.com/llvm/llvm-project/pull/134487