Revert "Subzero. ARM32. Initial sandboxing code."

tests_lit/assembler/arm32/sandboxing.ll

-; Tests basics and corner cases of x86-32 sandboxing, using -Om1 in
-; the hope that the output will remain stable.  When packing bundles,
-; we try to limit to a few instructions with well known sizes and
-; minimal use of registers and stack slots in the lowering sequence.
-
-; RUN: %p2i -i %s --sandbox --filetype=asm --target=arm32 --assemble \
-; RUN:   --disassemble --args -Om1 -allow-externally-defined-symbols \
-; RUN:   -ffunction-sections  | FileCheck %s
-
-declare void @call_target()
-@global_short = internal global [2 x i8] zeroinitializer
-
-; A direct call sequence uses the right mask and register-call sequence.
-define internal void @test_direct_call() {
-entry:
-  call void @call_target()
-  ret void
-}
-; CHECK-LABEL: test_direct_call
-; CHECK: nop
-; CHECK: c: {{.*}} bl {{.*}} call_target
-; CHECK-NEXT: 10:
-
-; An indirect call sequence uses the right mask and register-call sequence.
-define internal void @test_indirect_call(i32 %target) {
-entry:
-  %__1 = inttoptr i32 %target to void ()*
-  call void %__1()
-  ret void
-}
-; CHECK-LABEL: test_indirect_call
-; CHECK: ldr [[REG:.*]], [sp, 
-; CHECK-NEXT: nop
-; CHECK-NEXT: nop
-; CHECK: 18: {{.*}} bic [[REG]], [[REG]], {{.*}} 0xc000000f
-; CHECK-NEXT: blx [[REG]]
-; CHECk-NEXT: 20:
-
-; A return sequences uses the right pop / mask / jmp sequence.
-define internal void @test_ret() {
-entry:
-  ret void
-}
-; CHECK-LABEL: test_ret
-; CHECK: 0: {{.*}} bic lr, lr, {{.*}} 0xc000000f
-; CHECK-NEXT: bx lr
-
-; Bundle lock without padding.
-define internal void @bundle_lock_without_padding() {
-entry:
-  %addr_short = bitcast [2 x i8]* @global_short to i16*
-  store i16 0, i16* %addr_short, align 1
-  ret void
-}
-; CHECK-LABEL: bundle_lock_without_padding
-; CHECK: 0: {{.*}} movw
-; CHECK-NEXT: movt
-; CHECK-NEXT: movw
-; CHECK-NEXT: strh
-; CHECK-NEXT: bic lr, lr, {{.*}} 0xc000000f
-; CHECK-NEXT: {{.*}} bx lr
-
-; Bundle lock with padding.
-define internal void @bundle_lock_with_padding() {
-entry:
-  call void @call_target()
-  ; bundle boundary
-  store i16 0, i16* undef, align 1   ; 3 insts
-  store i16 0, i16* undef, align 1   ; 3 insts
-  store i16 0, i16* undef, align 1   ; 3 insts
-                                     ; SP adjustment + pop
-  ; nop
-  ; bundle boundary
-  ret void
-}
-; CHECK-LABEL: bundle_lock_with_padding
-; CHECK: 38: {{.*}} pop
-; CHECK-NEXT: nop
-; CHECK-NEXT: bic lr, lr, {{.*}} 0xc000000f
-; CHECK-NEXT: {{.*}} bx lr
-
-; Bundle lock align_to_end without any padding.
-define internal void @bundle_lock_align_to_end_padding_0() {
-entry:
-  call void @call_target()
-  ; bundle boundary
-  store i16 0, i16* undef, align 1
-  call void @call_target()
-  ; bundle boundary
-  ret void
-}
-; CHECK-LABEL: bundle_lock_align_to_end_padding_0
-; CHECK: c: {{.*}} bl {{.*}} call_target
-; CHECK-NEXT: movw
-; CHECK-NEXT: movw
-; CHECK-NEXT: strh
-; CHECK-NEXT: bl {{.*}} call_target
-; CHECK-NEXT: add
-; CHECK-NEXT: pop
-; CHECK-NEXT: bic lr, lr, {{.*}} 0xc000000f
-; CHECK-NEXT: {{.*}} bx lr
-
-; Bundle lock align_to_end with one bunch of padding.
-define internal void @bundle_lock_align_to_end_padding_1() {
-entry:
-  call void @call_target()
-  ; bundle boundary
-  store i16 0, i16* undef, align 1
-  store i16 0, i16* undef, align 1
-  ; bundle boundary
-  call void @call_target()
-  ; bundle boundary
-  ret void
-}
-; CHECK-LABEL: bundle_lock_align_to_end_padding_1
-; CHECK: c: {{.*}} bl {{.*}} call_target
-; CHECK-NEXT: movw
-; CHECK-NEXT: movw
-; CHECK-NEXT: strh
-; CHECK-NEXT: movw
-; CHECK-NEXT: movw
-; CHECK-NEXT: strh
-; CHECK-NEXT: nop
-; CHECK-NEXT: bl {{.*}} call_target
-; CHECK-NEXT: add
-; CHECK-NEXT: pop
-; CHECK-NEXT: bic lr, lr, {{.*}} 0xc000000f
-; CHECK-NEXT: {{.*}} bx lr
-
-; Bundle lock align_to_end with two bunches of padding.
-define internal void @bundle_lock_align_to_end_padding_2(i32 %target) {
-entry:
-  call void @call_target()
-  ; bundle boundary
-  %__1 = inttoptr i32 %target to void ()*
-  store i8 0, i8* undef, align 1
-  call void %__1()
-  ret void
-}
-; CHECK-LABEL: bundle_lock_align_to_end_padding_2
-; CHECK: c: {{.*}} bl {{.*}} call_target
-; CHECK-NEXT: movw
-; CHECK-NEXT: movw
-; CHECK-NEXT: strb
-; CHECK: 20: {{.*}} nop
-; CHECK-NEXT: nop
-; CHECK-NEXT: bic [[REG:r[0-9]+]], [[REG]], {{.*}} 0xc000000f
-; CHECK-NEXT: {{.*}} blx [[REG]]
-