Allow ability to name unnamed global addresses in Subzero.

tests_lit/reader_tests/unnamed.ll

+; Tests that we name unnamed global addresses.
+
+; RUN: llvm-as < %s | pnacl-freeze \
+; RUN:              | %llvm2ice -notranslate -verbose=inst -build-on-read \
+; RUN:                -allow-pnacl-reader-error-recovery \
+; RUN:              | FileCheck %s
+
+; RUN: llvm-as < %s | pnacl-freeze \
+; RUN:              | %llvm2ice -notranslate -verbose=inst -build-on-read \
+; RUN:                -default-function-prefix=h -default-global-prefix=g \
+; RUN:                -allow-pnacl-reader-error-recovery \
+; RUN:              | FileCheck --check-prefix=BAD %s
+
+; TODO(kschimpf) Check global variable declarations, once generated.
+
+@0 = internal global [4 x i8] zeroinitializer, align 4
+@1 = internal constant [10 x i8] c"Some stuff", align 1
+@g = internal global [4 x i8] zeroinitializer, align 4
+
+; BAD: Warning: Default global prefix 'g' conflicts with name 'g'.
+
+define i32 @2(i32 %v) {
+  ret i32 %v
+}
+
+; CHECK:      define i32 @Function(i32 %__0) {
+; CHECK-NEXT: __0:
+; CHECK-NEXT:   ret i32 %__0
+; CHECK-NEXT: }
+
+define void @hg() {
+  ret void
+}
+
+; BAD: Warning: Default function prefix 'h' conflicts with name 'hg'.
+
+; CHECK-NEXT: define void @hg() {
+; CHECK-NEXT: __0:
+; CHECK-NEXT:   ret void
+; CHECK-NEXT: }
+
+define void @3() {
+  ret void
+}
+
+; CHECK-NEXT: define void @Function1() {
+; CHECK-NEXT: __0:
+; CHECK-NEXT:   ret void
+; CHECK-NEXT: }