1 files changed, 78 insertions, 0 deletions
diff --git a/llvm/test/Analysis/PhiValues/big_phi.ll b/llvm/test/Analysis/PhiValues/big_phi.ll
new file mode 100644
index 00000000000..6f13098db60
--- /dev/null
+++ b/llvm/test/Analysis/PhiValues/big_phi.ll
@@ -0,0 +1,78 @@
+; RUN: opt < %s -passes='print<phi-values>' -disable-output 2>&1 | FileCheck %s
+
+; This test has a phi with a large number of incoming values that are all the
+; same phi, and that phi depends on this phi. This is to check that phi values
+; analysis doesn't repeatedly add a phis values to itself until it segfaults.
+
+; CHECK-LABEL: PHI Values for function: fn
+define void @fn(i8* %arg) {
+entry:
+  br label %for.body
+
+for.body:
+; CHECK: PHI %phi1 has values:
+; CHECK-DAG: i8* %arg
+; CHECK-DAG: i8* undef
+  %phi1 = phi i8* [ %arg, %entry ], [ %phi2, %end ]
+  switch i32 undef, label %end [
+    i32 1, label %bb1
+    i32 2, label %bb2
+    i32 3, label %bb3
+    i32 4, label %bb4
+    i32 5, label %bb5
+    i32 6, label %bb6
+    i32 7, label %bb7
+    i32 8, label %bb8
+    i32 9, label %bb9
+    i32 10, label %bb10
+    i32 11, label %bb11
+    i32 12, label %bb12
+    i32 13, label %bb13
+  ]
+
+bb1:
+  br label %end
+
+bb2:
+  br label %end
+
+bb3:
+  br label %end
+
+bb4:
+  br label %end
+
+bb5:
+  br label %end
+
+bb6:
+  br label %end
+
+bb7:
+  br label %end
+
+bb8:
+  br label %end
+
+bb9:
+  br label %end
+
+bb10:
+  br label %end
+
+bb11:
+  br label %end
+
+bb12:
+  br label %end
+
+bb13:
+  br label %end
+
+end:
+; CHECK: PHI %phi2 has values:
+; CHECK-DAG: i8* %arg
+; CHECK-DAG: i8* undef
+  %phi2 = phi i8* [ %phi1, %for.body ], [ %phi1, %bb1 ], [ %phi1, %bb2 ], [ %phi1, %bb3 ], [ %phi1, %bb4 ], [ %phi1, %bb5 ], [ %phi1, %bb6 ], [ %phi1, %bb7 ], [ undef, %bb8 ], [ %phi1, %bb9 ], [ %phi1, %bb10 ], [ %phi1, %bb11 ], [ %phi1, %bb12 ], [ %phi1, %bb13 ]
+  br label %for.body
+}