| ; RUN: opt %s -enable-new-pm=0 -analyze -divergence -use-gpu-divergence-analysis | FileCheck %s |
| ; RUN: opt %s -passes='print<divergence>' -disable-output 2>&1 | FileCheck %s |
| |
| target datalayout = "e-i64:64-v16:16-v32:32-n16:32:64" |
| target triple = "nvptx64-nvidia-cuda" |
| |
| define i32 @hidden_diverge(i32 %n, i32 %a, i32 %b) { |
| ; CHECK-LABEL: Divergence Analysis' for function 'hidden_diverge' |
| entry: |
| %tid = call i32 @llvm.nvvm.read.ptx.sreg.tid.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 i32 %phi.ipd |
| } |
| |
| declare i32 @llvm.nvvm.read.ptx.sreg.tid.x() |
| |
| !nvvm.annotations = !{!0} |
| !0 = !{i32 (i32, i32, i32)* @hidden_diverge, !"kernel", i32 1} |
