[DivergenceAnalysis] fix a bug in computing influence regions

[oota-llvm.git] / test / Analysis / DivergenceAnalysis / NVPTX / diverge.ll

diff --git a/test/Analysis/DivergenceAnalysis/NVPTX/diverge.ll b/test/Analysis/DivergenceAnalysis/NVPTX/diverge.ll
index 9dd3d557f8cd3fec197a9fef5b31e9c03cf5356d..fc63038e77cc1ad65cac410e697c8747773c0fd0 100644 (file)
--- a/test/Analysis/DivergenceAnalysis/NVPTX/diverge.ll
+++ b/test/Analysis/DivergenceAnalysis/NVPTX/diverge.ll
@@ -185,14 +185,35 @@ else:
   ret i32 1
 }
 
+; Verifies sync-dependence is computed correctly in the absense of loops.
+define i32 @sync_no_loop(i32 %arg) {
+entry:
+  %0 = add i32 %arg, 1
+  %tid = call i32 @llvm.nvvm.read.ptx.sreg.tid.x()
+  %1 = icmp sge i32 %tid, 10
+  br i1 %1, label %bb1, label %bb2
+
+bb1:
+  br label %bb3
+
+bb2:
+  br label %bb3
+
+bb3:
+  %2 = add i32 %0, 2
+  ; CHECK-NOT: DIVERGENT: %2
+  ret i32 %2
+}
+
 declare i32 @llvm.nvvm.read.ptx.sreg.tid.x()
 declare i32 @llvm.nvvm.read.ptx.sreg.tid.y()
 declare i32 @llvm.nvvm.read.ptx.sreg.tid.z()
 declare i32 @llvm.ptx.read.laneid()
 
-!nvvm.annotations = !{!0, !1, !2, !3, !4}
+!nvvm.annotations = !{!0, !1, !2, !3, !4, !5}
 !0 = !{i32 (i32, i32, i32)* @no_diverge, !"kernel", i32 1}
 !1 = !{i32 (i32, i32)* @sync, !"kernel", i32 1}
 !2 = !{i32 (i32, i32, i32)* @mixed, !"kernel", i32 1}
 !3 = !{i32 ()* @loop, !"kernel", i32 1}
 !4 = !{i32 (i1)* @unstructured_loop, !"kernel", i32 1}
+!5 = !{i32 (i32)* @sync_no_loop, !"kernel", i32 1}