Add Om1 lowering with no optimizations

tests_lit/llvm2ice_tests/global.ll

-; RUIN: %llvm2ice -verbose inst %s | FileCheck %s
-; RUIN: %llvm2ice --verbose none %s | FileCheck --check-prefix=ERRORS %s
+; Trivial test of the use of internal versus external global
+; functions.
+
+; RUN: %llvm2ice --verbose inst %s | FileCheck %s
+; RUN: %llvm2ice --verbose none %s | FileCheck --check-prefix=ERRORS %s
 ; RUN: %llvm2iceinsts %s | %szdiff %s | FileCheck --check-prefix=DUMP %s
 
 ; Note: We don't run this test using a PNaCl bitcode file, because
 ; external globals are not in the PNaCl ABI.
 
 @intern_global = global [4 x i8] [i8 0, i8 0, i8 0, i8 12], align 4
 @extern_global = external global [4 x i8]
 
 define i32 @test_intern_global() {
 ; CHECK: define i32 @test_intern_global
 entry:
   %__1 = bitcast [4 x i8]* @intern_global to i32*
   %v0 = load i32* %__1, align 1
   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
 ; DUMP-NOT: SZ