[llvm] [AMDGPU] Enable CSE in the GlobalISel post-legalizer combiner (PR #217258)

[Matt Arsenault via llvm-commits]

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@@ -8288,14 +8286,20 @@ bool AMDGPULegalizerInfo::legalizeIntrinsic(LegalizerHelper &Helper,
 
       MachineBasicBlock *CondBrTarget = BrCond->getOperand(1).getMBB();
       Register Reg = MI.getOperand(2).getReg();
+      Register NewReg = MRI.createVirtualRegister(
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arsenm wrote:

Same 

https://github.com/llvm/llvm-project/pull/217258