| ; RUN: opt -mtriple amdgcn-unknown-amdhsa -analyze -divergence -use-gpu-divergence-analysis %s | FileCheck %s |
| |
| define amdgpu_kernel void @hidden_diverge(i32 %n, i32 %a, i32 %b) #0 { |
| ; CHECK-LABEL: Printing analysis 'Legacy Divergence Analysis' for function 'hidden_diverge' |
| entry: |
| %tid = call i32 @llvm.amdgcn.workitem.id.x() |
| %cond.var = icmp slt i32 %tid, 0 |
| br i1 %cond.var, label %B, label %C ; divergent |
| ; CHECK: DIVERGENT: br i1 %cond.var, |
| B: |
| %cond.uni = icmp slt i32 %n, 0 |
| br i1 %cond.uni, label %C, label %merge ; uniform |
| ; CHECK-NOT: DIVERGENT: br i1 %cond.uni, |
| C: |
| %phi.var.hidden = phi i32 [ 1, %entry ], [ 2, %B ] |
| ; CHECK: DIVERGENT: %phi.var.hidden = phi i32 |
| br label %merge |
| merge: |
| %phi.ipd = phi i32 [ %a, %B ], [ %b, %C ] |
| ; CHECK: DIVERGENT: %phi.ipd = phi i32 |
| ret void |
| } |
| |
| declare i32 @llvm.amdgcn.workitem.id.x() #0 |
| |
| attributes #0 = { nounwind readnone } |
