new testcase

llvm-svn: 27981

llvm/test/Regression/Transforms/IndVarsSimplify/complex-scev.ll

@@ -0,0 +1,28 @@
+; The i induction variable looks like a wrap-around, but it really is just
+; a simple affine IV.  Make sure that indvars eliminates it.
+
+; RUN: llvm-as < %s | opt -indvars | llvm-dis | grep phi | wc -l | grep 1
+
+void %foo() {
+entry:
+	br label %bb6
+
+bb6:		; preds = %cond_true, %entry
+	%j.0 = phi int [ 1, %entry ], [ %tmp5, %cond_true ]		; <int> [#uses=3]
+	%i.0 = phi int [ 0, %entry ], [ %j.0, %cond_true ]		; <int> [#uses=1]
+	%tmp7 = call int (...)* %foo2( )		; <int> [#uses=1]
+	%tmp = setne int %tmp7, 0		; <bool> [#uses=1]
+	br bool %tmp, label %cond_true, label %return
+
+cond_true:		; preds = %bb6
+	%tmp2 = call int (...)* %bar( int %i.0, int %j.0 )		; <int> [#uses=0]
+	%tmp5 = add int %j.0, 1		; <int> [#uses=1]
+	br label %bb6
+
+return:		; preds = %bb6
+	ret void
+}
+
+declare int %bar(...)
+
+declare int %foo2(...)