New test case. x86 isel was creating a cycle in the DAG.

llvm-svn: 28477

llvm/test/Regression/CodeGen/X86/2006-05-25-CycleInDAG.ll

+; RUN: llvm-as < %s | llc -march=x86
+
+int %test() {
+	br bool false, label %cond_next33, label %cond_true12
+
+cond_true12:
+	ret int 0
+
+cond_next33:
+	%tmp44.i = call double %foo( double 0.000000e+00, int 32 )
+	%tmp61.i = load ubyte* null
+	%tmp61.i = cast ubyte %tmp61.i to int
+	%tmp58.i = or int 0, %tmp61.i
+	%tmp62.i = or int %tmp58.i, 0
+	%tmp62.i = cast int %tmp62.i to double
+	%tmp64.i = add double %tmp62.i, %tmp44.i
+	%tmp68.i = call double %foo( double %tmp64.i, int 0 )
+	ret int 0
+}
+
+declare double %foo(double, int)