New testcase for a switch lowering bug.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30141 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/Generic/2006-09-06-SwitchLowering.ll b/test/CodeGen/Generic/2006-09-06-SwitchLowering.ll
new file mode 100644 (file)
index 0000000..29b81bb
--- /dev/null
+++ b/test/CodeGen/Generic/2006-09-06-SwitchLowering.ll
@@ -0,0 +1,96 @@
+; RUN: llvm-as < %s | llc
+
+void %foo() {
+       br label %cond_true813.i
+
+cond_true813.i:                ; preds = %0
+       br bool false, label %cond_true818.i, label %cond_next1146.i
+
+cond_true818.i:                ; preds = %cond_true813.i
+       br bool false, label %recog_memoized.exit52, label %cond_next1146.i
+
+recog_memoized.exit52:         ; preds = %cond_true818.i
+       switch int 0, label %bb886.i.preheader [
+                int 0, label %bb907.i
+                int 44, label %bb866.i
+                int 103, label %bb874.i
+                int 114, label %bb874.i
+       ]
+
+bb857.i:               ; preds = %bb886.i, %bb866.i
+       %tmp862.i494.24 = phi sbyte* [ null, %bb866.i ], [ %tmp862.i494.26, %bb886.i ]          ; <sbyte*> [#uses=4]
+       switch int 0, label %bb886.i.preheader [
+                int 0, label %bb907.i
+                int 44, label %bb866.i
+                int 103, label %bb874.i
+                int 114, label %bb874.i
+       ]
+
+bb866.i.loopexit:              ; preds = %bb874.i
+       br label %bb866.i
+
+bb866.i.loopexit31:            ; preds = %cond_true903.i
+       br label %bb866.i
+
+bb866.i:               ; preds = %bb866.i.loopexit31, %bb866.i.loopexit, %bb857.i, %recog_memoized.exit52
+       br bool false, label %bb907.i, label %bb857.i
+
+bb874.i.preheader.loopexit:            ; preds = %cond_true903.i, %cond_true903.i
+       ret void
+
+bb874.i:               ; preds = %bb857.i, %bb857.i, %recog_memoized.exit52, %recog_memoized.exit52
+       %tmp862.i494.25 = phi sbyte* [ %tmp862.i494.24, %bb857.i ], [ %tmp862.i494.24, %bb857.i ], [ undef, %recog_memoized.exit52 ], [ undef, %recog_memoized.exit52 ]         ; <sbyte*> [#uses=1]
+       switch int 0, label %bb886.i.preheader.loopexit [
+                int 0, label %bb907.i
+                int 44, label %bb866.i.loopexit
+                int 103, label %bb874.i.backedge
+                int 114, label %bb874.i.backedge
+       ]
+
+bb874.i.backedge:              ; preds = %bb874.i, %bb874.i
+       ret void
+
+bb886.i.preheader.loopexit:            ; preds = %bb874.i
+       ret void
+
+bb886.i.preheader:             ; preds = %bb857.i, %recog_memoized.exit52
+       %tmp862.i494.26 = phi sbyte* [ undef, %recog_memoized.exit52 ], [ %tmp862.i494.24, %bb857.i ]           ; <sbyte*> [#uses=1]
+       br label %bb886.i
+
+bb886.i:               ; preds = %cond_true903.i, %bb886.i.preheader
+       br bool false, label %bb857.i, label %cond_true903.i
+
+cond_true903.i:                ; preds = %bb886.i
+       switch int 0, label %bb886.i [
+                int 0, label %bb907.i
+                int 44, label %bb866.i.loopexit31
+                int 103, label %bb874.i.preheader.loopexit
+                int 114, label %bb874.i.preheader.loopexit
+       ]
+
+bb907.i:               ; preds = %cond_true903.i, %bb874.i, %bb866.i, %bb857.i, %recog_memoized.exit52
+       %tmp862.i494.0 = phi sbyte* [ %tmp862.i494.24, %bb857.i ], [ null, %bb866.i ], [ undef, %recog_memoized.exit52 ], [ %tmp862.i494.25, %bb874.i ], [ null, %cond_true903.i ]              ; <sbyte*> [#uses=1]
+       br bool false, label %cond_next1146.i, label %cond_true910.i
+
+cond_true910.i:                ; preds = %bb907.i
+       ret void
+
+cond_next1146.i:               ; preds = %bb907.i, %cond_true818.i, %cond_true813.i
+       %tmp862.i494.1 = phi sbyte* [ %tmp862.i494.0, %bb907.i ], [ undef, %cond_true818.i ], [ undef, %cond_true813.i ]                ; <sbyte*> [#uses=0]
+       ret void
+
+bb2060.i:              ; No predecessors!
+       br bool false, label %cond_true2064.i, label %bb2067.i
+
+cond_true2064.i:               ; preds = %bb2060.i
+       unreachable
+
+bb2067.i:              ; preds = %bb2060.i
+       ret void
+
+cond_next3473:         ; No predecessors!
+       ret void
+
+cond_next3521:         ; No predecessors!
+       ret void
+}