Constant split values needs upper bound and lower bound check, just like any other split value.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41389 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 52 insertions, 0 deletions

diff --git a/test/Transforms/LoopIndexSplit/UpperBound-2007-08-24.ll b/test/Transforms/LoopIndexSplit/UpperBound-2007-08-24.ll
new file mode 100644
index 0000000000..c5064517dd
--- /dev/null
+++ b/test/Transforms/LoopIndexSplit/UpperBound-2007-08-24.ll
@@ -0,0 +1,52 @@
+; Split loop. Split value is a constant and greater then exit value. 
+; Check whether optimizer inserts proper checkfor split value or not.
+; RUN: llvm-as < %s | opt -loop-index-split | llvm-dis | grep select
+
+@k = external global i32		; <i32*> [#uses=2]
+
+define void @foobar(i32 %a, i32 %b) {
+entry:
+	br label %bb
+
+bb:		; preds = %cond_next16, %entry
+	%i.01.0 = phi i32 [ 0, %entry ], [ %tmp18, %cond_next16 ]		; <i32> [#uses=5]
+	%tsum.18.0 = phi i32 [ 42, %entry ], [ %tsum.013.1, %cond_next16 ]		; <i32> [#uses=3]
+	%tmp1 = icmp slt i32 %i.01.0, 500		; <i1> [#uses=1]
+	br i1 %tmp1, label %cond_true, label %cond_false
+
+cond_true:		; preds = %bb
+	%tmp4 = tail call i32 @foo( i32 %i.01.0 )		; <i32> [#uses=1]
+	%tmp6 = add i32 %tmp4, %tsum.18.0		; <i32> [#uses=2]
+	%tmp914 = load i32* @k, align 4		; <i32> [#uses=1]
+	%tmp1015 = icmp eq i32 %tmp914, 0		; <i1> [#uses=1]
+	br i1 %tmp1015, label %cond_next16, label %cond_true13
+
+cond_false:		; preds = %bb
+	%tmp8 = tail call i32 @bar( i32 %i.01.0 )		; <i32> [#uses=0]
+	%tmp9 = load i32* @k, align 4		; <i32> [#uses=1]
+	%tmp10 = icmp eq i32 %tmp9, 0		; <i1> [#uses=1]
+	br i1 %tmp10, label %cond_next16, label %cond_true13
+
+cond_true13:		; preds = %cond_false, %cond_true
+	%tsum.013.0 = phi i32 [ %tmp6, %cond_true ], [ %tsum.18.0, %cond_false ]		; <i32> [#uses=1]
+	%tmp15 = tail call i32 @bar( i32 %i.01.0 )		; <i32> [#uses=0]
+	br label %cond_next16
+
+cond_next16:		; preds = %cond_false, %cond_true, %cond_true13
+	%tsum.013.1 = phi i32 [ %tsum.013.0, %cond_true13 ], [ %tmp6, %cond_true ], [ %tsum.18.0, %cond_false ]		; <i32> [#uses=2]
+	%tmp18 = add i32 %i.01.0, 1		; <i32> [#uses=3]
+	%tmp21 = icmp slt i32 %tmp18, 100		; <i1> [#uses=1]
+	br i1 %tmp21, label %bb, label %bb24
+
+bb24:		; preds = %cond_next16
+	%tmp18.lcssa = phi i32 [ %tmp18, %cond_next16 ]		; <i32> [#uses=1]
+	%tsum.013.1.lcssa = phi i32 [ %tsum.013.1, %cond_next16 ]		; <i32> [#uses=1]
+	%tmp27 = tail call i32 @t( i32 %tmp18.lcssa, i32 %tsum.013.1.lcssa )		; <i32> [#uses=0]
+	ret void
+}
+
+declare i32 @foo(i32)
+
+declare i32 @bar(i32)
+
+declare i32 @t(i32, i32)