diff --git a/test/Transforms/InstCombine/2006-12-23-Select-Cmp-Cmp.ll b/test/Transforms/InstCombine/2006-12-23-Select-Cmp-Cmp.ll
new file mode 100644
index 00000000000..80e31a727d1
--- /dev/null
+++ b/test/Transforms/InstCombine/2006-12-23-Select-Cmp-Cmp.ll
@@ -0,0 +1,33 @@
+; For PR1065. This causes an assertion in instcombine if a select with two cmp
+; operands is encountered.
+; RUN: llvm-as < %s | opt -instcombine -disable-output
+; ModuleID = 'PR1065.bc'
+target datalayout = "e-p:32:32"
+target endian = little
+target pointersize = 32
+target triple = "i686-pc-linux-gnu"
+	%struct.internal_state = type { int }
+	%struct.mng_data = type { uint, sbyte*, uint, uint, uint, uint, uint, uint, uint, uint, uint, ubyte, uint, uint, uint, sbyte, uint, uint, uint, uint, ushort, ushort, ushort, sbyte, sbyte, double, double, double, sbyte, sbyte, sbyte, sbyte, uint, uint, uint, uint, int, sbyte, int, int, sbyte*, sbyte* (uint)*, void (sbyte*, uint)*, void (sbyte*, sbyte*, uint)*, sbyte (%struct.mng_data*)*, sbyte (%struct.mng_data*)*, sbyte (%struct.mng_data*, sbyte*, uint, uint*)*, sbyte (%struct.mng_data*, sbyte*, uint, uint*)*, sbyte (%struct.mng_data*, int, sbyte, int, uint, int, int, sbyte*)*, sbyte (%struct.mng_data*, int, int, sbyte*)*, sbyte (%struct.mng_data*, uint, uint)*, sbyte (%struct.mng_data*, ubyte, sbyte*, sbyte*, sbyte*, sbyte*)*, sbyte (%struct.mng_data*)*, sbyte (%struct.mng_data*, sbyte*)*, sbyte (%struct.mng_data*, sbyte*)*, sbyte (%struct.mng_data*, uint, uint)*, sbyte (%struct.mng_data*, int, uint, sbyte*)*, sbyte (%struct.mng_data*, ubyte, ubyte, uint, uint)*, sbyte* (%struct.mng_data*, uint)*, sbyte* (%struct.mng_data*, uint)*, sbyte* (%struct.mng_data*, uint)*, sbyte (%struct.mng_data*, uint, uint, uint, uint)*, uint (%struct.mng_data*)*, sbyte (%struct.mng_data*, uint)*, sbyte (%struct.mng_data*, uint)*, sbyte (%struct.mng_data*, uint, uint, uint, uint, uint, uint, uint, uint)*, sbyte (%struct.mng_data*, ubyte)*, sbyte (%struct.mng_data*, uint, sbyte*)*, sbyte (%struct.mng_data*, uint, sbyte, sbyte*)*, sbyte, int, uint, sbyte*, sbyte*, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, uint, uint, ubyte, ubyte, ubyte, ubyte, ubyte, uint, sbyte, sbyte, sbyte, uint, ubyte*, uint, ubyte*, uint, sbyte, ubyte, sbyte, uint, ubyte*, ubyte*, uint, uint, ubyte*, ubyte*, %struct.mng_pushdata*, %struct.mng_pushdata*, %struct.mng_pushdata*, %struct.mng_pushdata*, sbyte, sbyte, int, uint, ubyte*, sbyte, sbyte, uint, uint, uint, uint, uint, uint, sbyte, sbyte, sbyte, sbyte, int, int, sbyte*, uint, uint, uint, sbyte, sbyte, uint, uint, uint, uint, sbyte, sbyte, ubyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, uint, sbyte*, sbyte*, sbyte*, uint, sbyte*, sbyte*, sbyte*, sbyte*, sbyte*, %struct.mng_savedata*, uint, uint, uint, uint, sbyte, int, int, int, int, int, int, int, int, int, int, int, int, uint, uint, uint, uint, ubyte*, ubyte*, ubyte*, sbyte, sbyte, int, int, int, int, int, int, int, int, int, sbyte*, sbyte*, sbyte*, sbyte*, sbyte*, sbyte*, [256 x ubyte], double, void ()*, void ()*, void ()*, void ()*, void ()*, void ()*, void ()*, void ()*, void ()*, void ()*, void ()*, void ()*, ushort, sbyte, ubyte, sbyte, ubyte, sbyte, int, int, sbyte, int, int, int, int, ushort, ushort, ushort, ubyte, ushort, ubyte, int, int, uint, uint, ubyte, uint, uint, sbyte, int, int, int, int, ubyte, uint, uint, sbyte, int, int, int, int, uint, sbyte, uint, ubyte, ushort, ushort, ushort, short, uint, [256 x %struct.mng_palette8e], uint, [256 x ubyte], uint, uint, uint, uint, uint, uint, uint, uint, uint, ubyte, uint, sbyte*, ushort, ushort, ushort, sbyte*, ubyte, ubyte, uint, uint, uint, uint, sbyte, void ()*, void ()*, void ()*, void ()*, void ()*, void ()*, sbyte*, ubyte, ubyte, ubyte, uint, sbyte*, sbyte*, ushort, ushort, ushort, ushort, int, int, sbyte*, %struct.z_stream, int, int, int, int, int, uint, sbyte, sbyte, [256 x uint], sbyte }
+	%struct.mng_palette8e = type { ubyte, ubyte, ubyte }
+	%struct.mng_pushdata = type { sbyte*, sbyte*, uint, sbyte, ubyte*, uint }
+	%struct.mng_savedata = type { sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, sbyte, ushort, ushort, ushort, ubyte, ushort, ubyte, ubyte, uint, uint, sbyte, int, int, int, int, uint, [256 x %struct.mng_palette8e], uint, [256 x ubyte], uint, uint, uint, uint, uint, uint, uint, uint, uint, ubyte, uint, sbyte*, ushort, ushort, ushort }
+	%struct.z_stream = type { ubyte*, uint, uint, ubyte*, uint, uint, sbyte*, %struct.internal_state*, sbyte* (sbyte*, uint, uint)*, void (sbyte*, sbyte*)*, sbyte*, int, uint, uint }
+
+implementation   ; Functions:
+
+void %mng_write_basi() {
+entry:
+	%tmp = load ubyte* null		; <ubyte> [#uses=1]
+	%tmp = icmp ugt ubyte %tmp, 8		; <bool> [#uses=1]
+	%tmp = load ushort* null		; <ushort> [#uses=2]
+	%tmp3 = icmp eq ushort %tmp, 255		; <bool> [#uses=1]
+	%tmp7 = icmp eq ushort %tmp, -1		; <bool> [#uses=1]
+	%bOpaque.0.in = select bool %tmp, bool %tmp7, bool %tmp3		; <bool> [#uses=1]
+	br bool %bOpaque.0.in, label %cond_next90, label %bb95
+
+cond_next90:		; preds = %entry
+	ret void
+
+bb95:		; preds = %entry
+	ret void
+}