[llvm] [AMDGPU] Add intrinsic readanylane (PR #115696)

[Xin Russell Liu via llvm-commits]

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@@ -97,9 +98,11 @@ bool AMDGPUInstructionSelector::isVCC(Register Reg,
 
 bool AMDGPUInstructionSelector::constrainCopyLikeIntrin(MachineInstr &MI,
                                                         unsigned NewOpc) const {
+  const bool NeedExec = NewOpc != AMDGPU::SI_READANYLANE;
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GinShio wrote:

For the 1st version, it's SAlu and I thought it's uniform when defined. So...
Now, the intrinsic depends on exec.

https://github.com/llvm/llvm-project/pull/115696