New testcase for testing constant pointers to globals

llvm-svn: 784

llvm/test/Feature/constpointer.ll

+; This testcase is primarily used for testing that global values can be used as 
+; constant pointer initializers.  This is tricky because they can be forward
+; declared and involves an icky bytecode encoding.  There is no meaningful 
+; optimization that can be performed on this file, it is just here to test 
+; assembly and disassembly.
+;
+
+
+%t3 = global int * %t1           ;; Forward reference
+%t1 = global int 4
+%t2 = global int * %t1
+
+global float * %0                ;; Forward numeric reference
+global float * %0                ;; Duplicate forward numeric reference
+global float 0.0
+global float * %0                ;; Numeric reference
+
+
+%fptr = global void() * %f       ;; Forward ref method defn
+declare void "f"()               ;; External method
+
+implementation
+