1; RUN: opt -mtriple amdgcn-unknown-amdhsa -analyze -divergence -use-gpu-divergence-analysis %s | FileCheck %s 2 3; CHECK: bb3: 4; CHECK: DIVERGENT: %Guard.bb4 = phi i1 [ true, %bb1 ], [ false, %bb2 ] 5; CHECK: DIVERGENT: br i1 %Guard.bb4, label %bb4, label %bb5 6 7; Function Attrs: nounwind readnone speculatable 8declare i32 @llvm.amdgcn.workitem.id.x() #0 9 10define protected amdgpu_kernel void @test() { 11bb0: 12 %tid.x = call i32 @llvm.amdgcn.workitem.id.x() 13 %i5 = icmp eq i32 %tid.x, -1 14 br label %bb1 15 16bb1: ; preds = %bb2, %bb0 17 %lsr.iv = phi i32 [ 7, %bb0 ], [ %lsr.iv.next, %bb2 ] 18 br i1 %i5, label %bb2, label %bb3 19 20bb2: ; preds = %bb1 21 %lsr.iv.next = add nsw i32 %lsr.iv, -1 22 %i14 = icmp eq i32 %lsr.iv.next, 0 23 br i1 %i14, label %bb3, label %bb1 24 25bb3: ; preds = %bb2, %bb1 26 %Guard.bb4 = phi i1 [ true, %bb1 ], [ false, %bb2 ] 27 br i1 %Guard.bb4, label %bb4, label %bb5 28 29bb4: ; preds = %bb3 30 br label %bb5 31 32bb5: ; preds = %bb3, %bb4 33 ret void 34} 35 36attributes #0 = { nounwind readnone speculatable } 37