1 files changed, 32 insertions, 0 deletions
diff --git a/llvm/test/Transforms/IndVarSimplify/2008-10-03-CouldNotCompute.ll b/llvm/test/Transforms/IndVarSimplify/2008-10-03-CouldNotCompute.ll
new file mode 100644
index 00000000000..c78188d4d22
--- /dev/null
+++ b/llvm/test/Transforms/IndVarSimplify/2008-10-03-CouldNotCompute.ll
@@ -0,0 +1,32 @@
+; RUN: llvm-as < %s | opt -indvars
+; PR2857
+
+@foo = external global i32		; <i32*> [#uses=1]
+
+define void @test(i32 %n, i32 %arg) {
+entry:
+	br i1 false, label %bb.nph, label %return
+
+bb.nph:		; preds = %entry
+	%0 = load i32* @foo, align 4		; <i32> [#uses=1]
+	%1 = sext i32 %0 to i64		; <i64> [#uses=1]
+	br label %bb
+
+bb:		; preds = %bb, %bb.nph
+	%.in = phi i32 [ %2, %bb ], [ %n, %bb.nph ]		; <i32> [#uses=1]
+	%val.02 = phi i64 [ %5, %bb ], [ 0, %bb.nph ]		; <i64> [#uses=2]
+	%result.01 = phi i64 [ %4, %bb ], [ 0, %bb.nph ]		; <i64> [#uses=1]
+	%2 = add i32 %.in, -1		; <i32> [#uses=2]
+	%3 = mul i64 %1, %val.02		; <i64> [#uses=1]
+	%4 = add i64 %3, %result.01		; <i64> [#uses=2]
+	%5 = add i64 %val.02, 1		; <i64> [#uses=1]
+	%6 = icmp sgt i32 %2, 0		; <i1> [#uses=1]
+	br i1 %6, label %bb, label %bb3.bb4_crit_edge
+
+bb3.bb4_crit_edge:		; preds = %bb
+	%.lcssa = phi i64 [ %4, %bb ]		; <i64> [#uses=0]
+	ret void
+
+return:		; preds = %entry
+	ret void
+}