1 files changed, 36 insertions, 0 deletions
diff --git a/test/Transforms/SimplifyCFG/ForwardSwitchConditionToPHI.ll b/test/Transforms/SimplifyCFG/ForwardSwitchConditionToPHI.ll
new file mode 100644
index 0000000..1b70c06
--- /dev/null
+++ b/test/Transforms/SimplifyCFG/ForwardSwitchConditionToPHI.ll
@@ -0,0 +1,36 @@
+; RUN: opt < %s -simplifycfg -S | \
+; RUN:   not grep " switch"
+; PR10131
+
+; ModuleID = '<stdin>'
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32"
+target triple = "i386-pc-linux-gnu"
+
+define i32 @t(i32 %m) nounwind readnone {
+entry:
+  switch i32 %m, label %sw.bb4 [
+    i32 0, label %sw.bb0
+    i32 1, label %sw.bb1
+    i32 2, label %sw.bb2
+    i32 3, label %sw.bb3
+  ]
+
+sw.bb0:                                           ; preds = %entry
+  br label %return
+
+sw.bb1:                                           ; preds = %entry
+  br label %return
+
+sw.bb2:                                           ; preds = %entry
+  br label %return
+
+sw.bb3:                                           ; preds = %entry
+  br label %return
+
+sw.bb4:                                           ; preds = %entry
+  br label %return
+
+return:                                           ; preds = %entry, %sw.bb4, %sw.bb3, %sw.bb2, %sw.bb1
+  %retval.0 = phi i32 [ 4, %sw.bb4 ], [ 3, %sw.bb3 ], [ 2, %sw.bb2 ], [ 1, %sw.bb1 ], [ 0, %sw.bb0 ]
+  ret i32 %retval.0
+}