Add passes for applying SFI sandboxing at the LLVM IR level

test/Transforms/NaCl/flatten-globals.ll

 ; RUN: opt -flatten-globals %s -S | FileCheck %s
 ; RUN: opt -flatten-globals %s -S | FileCheck %s -check-prefix=CLEANED
 
 target datalayout = "p:32:32:32"
 
 
 ; Check simple cases
 
 @var_i32 = global i32 258
 ; CHECK: @var_i32 = global [4 x i8] c"\02\01\00\00"
@@ skipping 132 matching lines @@
 
 @block_addr = global i8* blockaddress(@func_with_block, %label)
 ; CHECK: @block_addr = global i32 ptrtoint (i8* blockaddress(@func_with_block, %label) to i32)
 
 @vector_reloc = global <2 x i32*> <i32* @var1, i32* @var1>
 ; CHECK: global <{ i32, i32 }> <{ i32 ptrtoint ([4 x i8]* @var1 to i32), i32 ptrtoint ([4 x i8]* @var1 to i32) }>
 
 
 ; Global references with addends
 
+@reloc_addend_add = global i32 add (i32 ptrtoint (%ptrs1* @ptrs1 to i32), i32 8)
+; CHECK: global i32 add (i32 ptrtoint (<{ i32, [8 x i8] }>* @ptrs1 to i32), i32 8)
+
 @reloc_addend = global i32* getelementptr (%ptrs1* @ptrs1, i32 0, i32 2)
 ; CHECK: @reloc_addend = global i32 add (i32 ptrtoint (<{ i32, [8 x i8] }>* @ptrs1 to i32), i32 8)
 
 @negative_addend = global %ptrs1* getelementptr (%ptrs1* @ptrs1, i32 -1)
 ; CHECK: @negative_addend = global i32 add (i32 ptrtoint (<{ i32, [8 x i8] }>* @ptrs1 to i32), i32 -12)
 
 @const_ptr = global i32* getelementptr (%ptrs1* null, i32 0, i32 2)
 ; CHECK: @const_ptr = global [4 x i8] c"\08\00\00\00"
 
 @int_to_ptr = global i32* inttoptr (i16 260 to i32*)
@@ skipping 35 matching lines @@
 }
 ; CHECK: define i32* @get_address() {
 ; CHECK-NEXT: ret i32* bitcast ([4 x i8]* @var_i32 to i32*)
 
 
 define void @func_with_block() {
   br label %label
 label:
   ret void
 }