Introduce model of global initializers in Subzero.

tests_lit/llvm2ice_tests/global.ll

Index: tests_lit/llvm2ice_tests/global.ll
diff --git a/tests_lit/llvm2ice_tests/global.ll b/tests_lit/llvm2ice_tests/global.ll
index 2b1d1e29cd8cbb1fe559335d8e2705ae94d7499f..dd8d55fda3b0819fded78cced6d7e945436af384 100644
--- a/tests_lit/llvm2ice_tests/global.ll
+++ b/tests_lit/llvm2ice_tests/global.ll
@@ -5,8 +5,8 @@
 ; RUN: %lc2i -i %s --args --verbose inst | FileCheck %s
 ; RUN: %lc2i -i %s --args --verbose none | FileCheck --check-prefix=ERRORS %s
 
+; Note: PNaCl ABI Doesn't allow external globals. Hence, not tested.
 @intern_global = internal global [4 x i8] c"\00\00\00\0C", align 4
-@extern_global = external global [4 x i8]
 
 define i32 @test_intern_global() {
 ; CHECK: define i32 @test_intern_global
@@ -16,12 +16,4 @@ entry:
   ret i32 %v0
 }
 
-define i32 @test_extern_global() {
-; CHECK: define i32 @test_extern_global
-entry:
-  %__1 = bitcast [4 x i8]* @extern_global to i32*
-  %v0 = load i32* %__1, align 1
-  ret i32 %v0
-}
-
 ; ERRORS-NOT: ICE translation error