[llvm] [AMDGPU] make AMDGPUUniformIntrinsicCombine a function pass (PR #165265)

[Sameer Sahasrabuddhe via llvm-commits]

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@@ -126,6 +130,8 @@ define protected amdgpu_kernel void @trivial_waterfall_ne_zero(ptr addrspace(1)
 ; PASS-CHECK-NEXT:    br label %[[WHILE:.*]]
 ; PASS-CHECK:       [[WHILE]]:
 ; PASS-CHECK-NEXT:    [[DONE:%.*]] = phi i1 [ false, %[[ENTRY]] ], [ true, %[[IF:.*]] ]
+; PASS-CHECK-NEXT:    [[BALLOT:%.*]] = tail call i64 @llvm.amdgcn.ballot.i64(i1 [[DONE]])
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ssahasra wrote:

This should disappear if you can keep the call to `eraseFromParent()`.

https://github.com/llvm/llvm-project/pull/165265