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diff --git a/test/Integer/constexpr_bt.ll b/test/Integer/constexpr_bt.ll
new file mode 100644
index 00000000000..fc8b06d4f40
--- /dev/null
+++ b/test/Integer/constexpr_bt.ll
@@ -0,0 +1,84 @@
+; RUN: llvm-as %s -o - | llvm-dis > %t1.ll
+; RUN: llvm-as %t1.ll -o - | llvm-dis > %t2.ll
+; RUN: diff %t1.ll %t2.ll
+
+
+; This testcase is for testing expressions constructed from
+; constant values, including constant pointers to globals.
+;
+
+;;-------------------------------
+;; Test constant cast expressions
+;;-------------------------------
+
+global i63 u0x00001     ; hexadecimal unsigned integer constants
+global i63  s0x012312   ; hexadecimal signed integer constants
+
+@t2 = global i33* @t1                             ;; Forward reference without cast
+@t3 = global i33* bitcast (i33* @t1 to i33*)       ;; Forward reference with cast
+@t1 = global i33 4                                ;; i32* @0
+@t4 = global i33** bitcast (i33** @t3 to i33**)     ;; Cast of a previous cast
+@t5 = global i33** @t3                           ;; Reference to a previous cast
+@t6 = global i33*** @t4
+@t7 = global float* inttoptr (i32 12345678 to float*) ;; Cast ordinary value to ptr
+@t9 = global i33 fptosi (float sitofp (i33 8 to float) to i33) ;; Nested cast expression
+
+
+global i32* bitcast (float* @4 to i32*)   ;; Forward numeric reference
+global float* @4                       ;; Duplicate forward numeric reference
+global float 0.0
+
+
+;;---------------------------------------------------
+;; Test constant getelementpr expressions for arrays
+;;---------------------------------------------------
+
+@array  = constant [2 x i33] [ i33 12, i33 52 ]
+@arrayPtr = global i33* getelementptr ([2 x i33]* @array, i64 0, i64 0)    ;; i33* &@array[0][0]
+@arrayPtr5 = global i33** getelementptr (i33** @arrayPtr, i64 5)    ;; i33* &@arrayPtr[5]
+
+@somestr = constant [11x i8] c"hello world"
+@char5  = global i8* getelementptr([11x i8]* @somestr, i64 0, i64 5)
+
+;; cast of getelementptr
+@char8a = global i33* bitcast (i8* getelementptr([11x i8]* @somestr, i64 0, i64 8) to i33*)
+
+;; getelementptr containing casts
+@char8b = global i8* getelementptr([11x i8]* @somestr, i64 sext (i8 0 to i64), i64 sext (i8 8 to i64))
+
+;;-------------------------------------------------------
+;; TODO: Test constant getelementpr expressions for structures
+;;-------------------------------------------------------
+
+%SType  = type { i33 , {float, {i8} }, i64 } ;; struct containing struct
+%SAType = type { i33 , {[2x float], i64} } ;; struct containing array
+
+@S1 = global %SType* null			;; Global initialized to NULL
+@S2c = constant %SType { i33 1, {float,{i8}} {float 2.0, {i8} {i8 3}}, i64 4}
+
+@S3c = constant %SAType { i33 1, {[2x float], i64} {[2x float] [float 2.0, float 3.0], i64 4} }
+
+@S1ptr = global %SType** @S1		    ;; Ref. to global S1
+@S2  = global %SType* @S2c		    ;; Ref. to constant S2
+@S3  = global %SAType* @S3c		    ;; Ref. to constant S3
+
+					    ;; Pointer to float (**@S1).1.0
+@S1fld1a = global float* getelementptr (%SType* @S2c, i64 0, i32 1, i32 0)
+					    ;; Another ptr to the same!
+@S1fld1b = global float* getelementptr (%SType* @S2c, i64 0, i32 1, i32 0)
+
+@S1fld1bptr = global float** @S1fld1b	    ;; Ref. to previous pointer
+
+					    ;; Pointer to i8 (**@S2).1.1.0
+@S2fld3 = global i8* getelementptr (%SType* @S2c, i64 0, i32 1, i32 1, i32 0) 
+
+					    ;; Pointer to float (**@S2).1.0[0]
+;@S3fld3 = global float* getelementptr (%SAType** @S3, i64 0, i64 0, i32 1, i32 0, i64 0) 
+
+;;---------------------------------------------------------
+;; TODO: Test constant expressions for unary and binary operators
+;;---------------------------------------------------------
+
+;;---------------------------------------------------
+
+