New test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36379 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/LoopStrengthReduce/2007-04-23-UseIterator.ll b/test/Transforms/LoopStrengthReduce/2007-04-23-UseIterator.ll
new file mode 100644 (file)
index 0000000..2d2dade
--- /dev/null
+++ b/test/Transforms/LoopStrengthReduce/2007-04-23-UseIterator.ll
@@ -0,0 +1,71 @@
+; RUN: llvm-as < %s | opt -loop-reduce -disable-output
+
+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"
+
+target triple = "i686-apple-darwin9"
+
+define i8* @foo( i8* %ABC) {
+entry:
+       switch i8 0, label %bb129 [
+                i8 0, label %UnifiedReturnBlock
+                i8 9, label %UnifiedReturnBlock
+                i8 32, label %UnifiedReturnBlock
+                i8 35, label %UnifiedReturnBlock
+                i8 37, label %bb16.preheader
+       ]
+
+bb16.preheader:                ; preds = %entry
+       br label %bb16
+
+bb16:          ; preds = %cond_next102, %bb16.preheader
+       %indvar = phi i32 [ %indvar.next, %cond_next102 ], [ 0, %bb16.preheader ]               ; <i32> [#uses=2]
+       %ABC.2146.0.rec = mul i32 %indvar, 3            ; <i32> [#uses=1]
+       br i1 false, label %UnifiedReturnBlock.loopexit, label %cond_next102
+
+cond_next102:          ; preds = %bb16
+       %tmp138145.rec = add i32 %ABC.2146.0.rec, 3             ; <i32> [#uses=1]
+       %tmp138145 = getelementptr i8* %ABC, i32 %tmp138145.rec         ; <i8*> [#uses=4]
+       %indvar.next = add i32 %indvar, 1               ; <i32> [#uses=1]
+       switch i8 0, label %bb129.loopexit [
+                i8 0, label %UnifiedReturnBlock.loopexit
+                i8 9, label %UnifiedReturnBlock.loopexit
+                i8 32, label %UnifiedReturnBlock.loopexit
+                i8 35, label %UnifiedReturnBlock.loopexit
+                i8 37, label %bb16
+       ]
+
+bb129.loopexit:                ; preds = %cond_next102
+       br label %bb129
+
+bb129:         ; preds = %bb129.loopexit, %entry
+       ret i8* null
+
+UnifiedReturnBlock.loopexit:           ; preds = %cond_next102, %cond_next102, %cond_next102, %cond_next102, %bb16
+       %UnifiedRetVal.ph = phi i8* [ %tmp138145, %cond_next102 ], [ %tmp138145, %cond_next102 ], [ %tmp138145, %cond_next102 ], [ %tmp138145, %cond_next102 ], [ null, %bb16 ]         ; <i8*> [#uses=0]
+       br label %UnifiedReturnBlock
+
+UnifiedReturnBlock:            ; preds = %UnifiedReturnBlock.loopexit, %entry, %entry, %entry, %entry
+       ret i8* null
+}
+
+define i8* @bar() {
+entry:
+       switch i8 0, label %bb158 [
+                i8 37, label %bb74
+                i8 58, label %cond_true
+                i8 64, label %bb11
+       ]
+
+bb11:          ; preds = %entry
+       ret i8* null
+
+cond_true:             ; preds = %entry
+       ret i8* null
+
+bb74:          ; preds = %entry
+       ret i8* null
+
+bb158:         ; preds = %entry
+       ret i8* null
+}
+