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llvm/llvm/test/CodeGen/ARM/indexed-mem.ll 

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=thumbv8m.main %s -o - | FileCheck %s --check-prefix=CHECK-V8M
; RUN: llc -mtriple=armv8 %s -o - | FileCheck %s  --check-prefix=CHECK-V8A

define ptr @pre_inc_ldr(ptr %base, i32 %a) {
; CHECK-V8M-LABEL: pre_inc_ldr:
; CHECK-V8M:       @ %bb.0:
; CHECK-V8M-NEXT:    ldr r2, [r0, #4]!
; CHECK-V8M-NEXT:    add r1, r2
; CHECK-V8M-NEXT:    str r1, [r0, #4]
; CHECK-V8M-NEXT:    bx lr
;
; CHECK-V8A-LABEL: pre_inc_ldr:
; CHECK-V8A:       @ %bb.0:
; CHECK-V8A-NEXT:    ldr r2, [r0, #4]!
; CHECK-V8A-NEXT:    add r1, r2, r1
; CHECK-V8A-NEXT:    str r1, [r0, #4]
; CHECK-V8A-NEXT:    bx lr
  %addr = getelementptr i32, ptr %base, i32 1
  %ld = load i32, ptr %addr
  %addr.1 = getelementptr i32, ptr %base, i32 2
  %res = add i32 %ld, %a
  store i32 %res, ptr %addr.1
  ret ptr %addr
}

define ptr @pre_dec_ldr(ptr %base, i32 %a) {
; CHECK-V8M-LABEL: pre_dec_ldr:
; CHECK-V8M:       @ %bb.0:
; CHECK-V8M-NEXT:    ldr r2, [r0, #-4]!
; CHECK-V8M-NEXT:    add r1, r2
; CHECK-V8M-NEXT:    str r1, [r0, #12]
; CHECK-V8M-NEXT:    bx lr
;
; CHECK-V8A-LABEL: pre_dec_ldr:
; CHECK-V8A:       @ %bb.0:
; CHECK-V8A-NEXT:    ldr r2, [r0, #-4]!
; CHECK-V8A-NEXT:    add r1, r2, r1
; CHECK-V8A-NEXT:    str r1, [r0, #12]
; CHECK-V8A-NEXT:    bx lr
  %addr = getelementptr i32, ptr %base, i32 -1
  %ld = load i32, ptr %addr
  %addr.1 = getelementptr i32, ptr %base, i32 2
  %res = add i32 %ld, %a
  store i32 %res, ptr %addr.1
  ret ptr %addr
}

define ptr @post_inc_ldr(ptr %base, ptr %addr.2, i32 %a) {
; CHECK-V8M-LABEL: post_inc_ldr:
; CHECK-V8M:       @ %bb.0:
; CHECK-V8M-NEXT:    ldr r3, [r0], #4
; CHECK-V8M-NEXT:    add r2, r3
; CHECK-V8M-NEXT:    str r2, [r1]
; CHECK-V8M-NEXT:    bx lr
;
; CHECK-V8A-LABEL: post_inc_ldr:
; CHECK-V8A:       @ %bb.0:
; CHECK-V8A-NEXT:    ldr r3, [r0], #4
; CHECK-V8A-NEXT:    add r2, r3, r2
; CHECK-V8A-NEXT:    str r2, [r1]
; CHECK-V8A-NEXT:    bx lr
  %ld = load i32, ptr %base
  %addr.1 = getelementptr i32, ptr %base, i32 1
  %res = add i32 %ld, %a
  store i32 %res, ptr %addr.2
  ret ptr %addr.1
}

define ptr @post_dec_ldr(ptr %base, ptr %addr.2, i32 %a) {
; CHECK-V8M-LABEL: post_dec_ldr:
; CHECK-V8M:       @ %bb.0:
; CHECK-V8M-NEXT:    ldr r3, [r0], #-4
; CHECK-V8M-NEXT:    add r2, r3
; CHECK-V8M-NEXT:    str r2, [r1]
; CHECK-V8M-NEXT:    bx lr
;
; CHECK-V8A-LABEL: post_dec_ldr:
; CHECK-V8A:       @ %bb.0:
; CHECK-V8A-NEXT:    ldr r3, [r0], #-4
; CHECK-V8A-NEXT:    add r2, r3, r2
; CHECK-V8A-NEXT:    str r2, [r1]
; CHECK-V8A-NEXT:    bx lr
  %ld = load i32, ptr %base
  %addr.1 = getelementptr i32, ptr %base, i32 -1
  %res = add i32 %ld, %a
  store i32 %res, ptr %addr.2
  ret ptr %addr.1
}

define ptr @pre_inc_str(ptr %base, i32 %a, i32 %b) {
; CHECK-V8M-LABEL: pre_inc_str:
; CHECK-V8M:       @ %bb.0:
; CHECK-V8M-NEXT:    add r1, r2
; CHECK-V8M-NEXT:    str r1, [r0, #4]!
; CHECK-V8M-NEXT:    bx lr
;
; CHECK-V8A-LABEL: pre_inc_str:
; CHECK-V8A:       @ %bb.0:
; CHECK-V8A-NEXT:    add r1, r1, r2
; CHECK-V8A-NEXT:    str r1, [r0, #4]!
; CHECK-V8A-NEXT:    bx lr
  %addr.1 = getelementptr i32, ptr %base, i32 1
  %res = add i32 %a, %b
  store i32 %res, ptr %addr.1
  ret ptr %addr.1
}

define ptr @pre_dec_str(ptr %base, i32 %a, i32 %b) {
; CHECK-V8M-LABEL: pre_dec_str:
; CHECK-V8M:       @ %bb.0:
; CHECK-V8M-NEXT:    add r1, r2
; CHECK-V8M-NEXT:    str r1, [r0, #-4]!
; CHECK-V8M-NEXT:    bx lr
;
; CHECK-V8A-LABEL: pre_dec_str:
; CHECK-V8A:       @ %bb.0:
; CHECK-V8A-NEXT:    add r1, r1, r2
; CHECK-V8A-NEXT:    str r1, [r0, #-4]!
; CHECK-V8A-NEXT:    bx lr
  %res = add i32 %a, %b
  %addr.1 = getelementptr i32, ptr %base, i32 -1
  store i32 %res, ptr %addr.1
  ret ptr %addr.1
}

define ptr @post_inc_str(ptr %base, i32 %a, i32 %b) {
; CHECK-V8M-LABEL: post_inc_str:
; CHECK-V8M:       @ %bb.0:
; CHECK-V8M-NEXT:    add r1, r2
; CHECK-V8M-NEXT:    str r1, [r0], #4
; CHECK-V8M-NEXT:    bx lr
;
; CHECK-V8A-LABEL: post_inc_str:
; CHECK-V8A:       @ %bb.0:
; CHECK-V8A-NEXT:    add r1, r1, r2
; CHECK-V8A-NEXT:    str r1, [r0], #4
; CHECK-V8A-NEXT:    bx lr
  %addr.1 = getelementptr i32, ptr %base, i32 1
  %res = add i32 %a, %b
  store i32 %res, ptr %base
  ret ptr %addr.1
}

define ptr @post_dec_str(ptr %base, i32 %a, i32 %b) {
; CHECK-V8M-LABEL: post_dec_str:
; CHECK-V8M:       @ %bb.0:
; CHECK-V8M-NEXT:    add r1, r2
; CHECK-V8M-NEXT:    str r1, [r0], #-4
; CHECK-V8M-NEXT:    bx lr
;
; CHECK-V8A-LABEL: post_dec_str:
; CHECK-V8A:       @ %bb.0:
; CHECK-V8A-NEXT:    add r1, r1, r2
; CHECK-V8A-NEXT:    str r1, [r0], #-4
; CHECK-V8A-NEXT:    bx lr
  %addr.1 = getelementptr i32, ptr %base, i32 -1
  %res = add i32 %a, %b
  store i32 %res, ptr %base
  ret ptr %addr.1
}

; TODO: Generate ldrd
define ptr @pre_inc_ldrd(ptr %base) {
; CHECK-V8M-LABEL: pre_inc_ldrd:
; CHECK-V8M:       @ %bb.0:
; CHECK-V8M-NEXT:    ldr r1, [r0, #4]!
; CHECK-V8M-NEXT:    ldr r2, [r0, #4]
; CHECK-V8M-NEXT:    add r1, r2
; CHECK-V8M-NEXT:    str r1, [r0, #8]
; CHECK-V8M-NEXT:    bx lr
;
; CHECK-V8A-LABEL: pre_inc_ldrd:
; CHECK-V8A:       @ %bb.0:
; CHECK-V8A-NEXT:    ldr r1, [r0, #4]!
; CHECK-V8A-NEXT:    ldr r2, [r0, #4]
; CHECK-V8A-NEXT:    add r1, r1, r2
; CHECK-V8A-NEXT:    str r1, [r0, #8]
; CHECK-V8A-NEXT:    bx lr
  %addr = getelementptr i32, ptr %base, i32 1
  %addr.1 = getelementptr i32, ptr %base, i32 2
  %addr.2 = getelementptr i32, ptr %base, i32 3
  %ld = load i32, ptr %addr
  %ld.1 = load i32, ptr %addr.1
  %res = add i32 %ld, %ld.1
  store i32 %res, ptr %addr.2
  ret ptr %addr
}

; TODO: Generate ldrd
define ptr @pre_dec_ldrd(ptr %base) {
; CHECK-V8M-LABEL: pre_dec_ldrd:
; CHECK-V8M:       @ %bb.0:
; CHECK-V8M-NEXT:    ldr r1, [r0, #-4]!
; CHECK-V8M-NEXT:    ldr r2, [r0, #-4]
; CHECK-V8M-NEXT:    add r1, r2
; CHECK-V8M-NEXT:    str r1, [r0, #-8]
; CHECK-V8M-NEXT:    bx lr
;
; CHECK-V8A-LABEL: pre_dec_ldrd:
; CHECK-V8A:       @ %bb.0:
; CHECK-V8A-NEXT:    ldr r1, [r0, #-4]!
; CHECK-V8A-NEXT:    ldr r2, [r0, #-4]
; CHECK-V8A-NEXT:    add r1, r1, r2
; CHECK-V8A-NEXT:    str r1, [r0, #-8]
; CHECK-V8A-NEXT:    bx lr
  %addr = getelementptr i32, ptr %base, i32 -1
  %addr.1 = getelementptr i32, ptr %base, i32 -2
  %addr.2 = getelementptr i32, ptr %base, i32 -3
  %ld = load i32, ptr %addr
  %ld.1 = load i32, ptr %addr.1
  %res = add i32 %ld, %ld.1
  store i32 %res, ptr %addr.2
  ret ptr %addr
}

; TODO: Generate post inc
define ptr @post_inc_ldrd(ptr %base, ptr %addr.3) {
; CHECK-V8M-LABEL: post_inc_ldrd:
; CHECK-V8M:       @ %bb.0:
; CHECK-V8M-NEXT:    ldrd r2, r3, [r0], #8
; CHECK-V8M-NEXT:    add r2, r3
; CHECK-V8M-NEXT:    str r2, [r1]
; CHECK-V8M-NEXT:    bx lr
;
; CHECK-V8A-LABEL: post_inc_ldrd:
; CHECK-V8A:       @ %bb.0:
; CHECK-V8A-NEXT:    ldrd r2, r3, [r0]
; CHECK-V8A-NEXT:    add r0, r0, #8
; CHECK-V8A-NEXT:    add r2, r2, r3
; CHECK-V8A-NEXT:    str r2, [r1]
; CHECK-V8A-NEXT:    bx lr
  %ld = load i32, ptr %base
  %addr.1 = getelementptr i32, ptr %base, i32 1
  %ld.1 = load i32, ptr %addr.1
  %addr.2 = getelementptr i32, ptr %base, i32 2
  %res = add i32 %ld, %ld.1
  store i32 %res, ptr %addr.3
  ret ptr %addr.2
}

define ptr @pre_inc_str_multi(ptr %base) {
; CHECK-V8M-LABEL: pre_inc_str_multi:
; CHECK-V8M:       @ %bb.0:
; CHECK-V8M-NEXT:    ldrd r1, r2, [r0]
; CHECK-V8M-NEXT:    add r1, r2
; CHECK-V8M-NEXT:    str r1, [r0, #8]!
; CHECK-V8M-NEXT:    bx lr
;
; CHECK-V8A-LABEL: pre_inc_str_multi:
; CHECK-V8A:       @ %bb.0:
; CHECK-V8A-NEXT:    ldrd r2, r3, [r0]
; CHECK-V8A-NEXT:    add r1, r2, r3
; CHECK-V8A-NEXT:    str r1, [r0, #8]!
; CHECK-V8A-NEXT:    bx lr
  %addr.1 = getelementptr i32, ptr %base, i32 1
  %ld = load i32, ptr %base
  %ld.1 = load i32, ptr %addr.1
  %res = add i32 %ld, %ld.1
  %addr.2 = getelementptr i32, ptr %base, i32 2
  store i32 %res, ptr %addr.2
  ret ptr %addr.2
}

define ptr @pre_dec_str_multi(ptr %base) {
; CHECK-V8M-LABEL: pre_dec_str_multi:
; CHECK-V8M:       @ %bb.0:
; CHECK-V8M-NEXT:    ldrd r1, r2, [r0]
; CHECK-V8M-NEXT:    add r1, r2
; CHECK-V8M-NEXT:    str r1, [r0, #-4]!
; CHECK-V8M-NEXT:    bx lr
;
; CHECK-V8A-LABEL: pre_dec_str_multi:
; CHECK-V8A:       @ %bb.0:
; CHECK-V8A-NEXT:    ldrd r2, r3, [r0]
; CHECK-V8A-NEXT:    add r1, r2, r3
; CHECK-V8A-NEXT:    str r1, [r0, #-4]!
; CHECK-V8A-NEXT:    bx lr
  %addr.1 = getelementptr i32, ptr %base, i32 1
  %ld = load i32, ptr %base
  %ld.1 = load i32, ptr %addr.1
  %res = add i32 %ld, %ld.1
  %addr.2 = getelementptr i32, ptr %base, i32 -1
  store i32 %res, ptr %addr.2
  ret ptr %addr.2
}

define ptr @illegal_pre_inc_store_1(ptr %base) {
; CHECK-V8M-LABEL: illegal_pre_inc_store_1:
; CHECK-V8M:       @ %bb.0: @ %entry
; CHECK-V8M-NEXT:    str r0, [r0, #8]
; CHECK-V8M-NEXT:    adds r0, #8
; CHECK-V8M-NEXT:    bx lr
;
; CHECK-V8A-LABEL: illegal_pre_inc_store_1:
; CHECK-V8A:       @ %bb.0: @ %entry
; CHECK-V8A-NEXT:    str r0, [r0, #8]
; CHECK-V8A-NEXT:    add r0, r0, #8
; CHECK-V8A-NEXT:    bx lr
entry:
  %ptr.to.use = getelementptr i32, ptr %base, i32 2
  %ptr.to.store = ptrtoint ptr %base to i32
  store i32 %ptr.to.store, ptr %ptr.to.use, align 4
  ret ptr %ptr.to.use
}

define ptr @legal_pre_inc_store_needs_copy_1(ptr %base) {
; CHECK-V8M-LABEL: legal_pre_inc_store_needs_copy_1:
; CHECK-V8M:       @ %bb.0: @ %entry
; CHECK-V8M-NEXT:    add.w r1, r0, #8
; CHECK-V8M-NEXT:    str r1, [r0, #8]
; CHECK-V8M-NEXT:    mov r0, r1
; CHECK-V8M-NEXT:    bx lr
;
; CHECK-V8A-LABEL: legal_pre_inc_store_needs_copy_1:
; CHECK-V8A:       @ %bb.0: @ %entry
; CHECK-V8A-NEXT:    add r1, r0, #8
; CHECK-V8A-NEXT:    str r1, [r0, #8]
; CHECK-V8A-NEXT:    mov r0, r1
; CHECK-V8A-NEXT:    bx lr
entry:
  %ptr.to.use = getelementptr i32, ptr %base, i32 2
  %ptr.to.store = ptrtoint ptr %ptr.to.use to i32
  store i32 %ptr.to.store, ptr %ptr.to.use, align 4
  ret ptr %ptr.to.use
}

define ptr @legal_pre_inc_store_needs_copy_2(i32 %base) {
; CHECK-V8M-LABEL: legal_pre_inc_store_needs_copy_2:
; CHECK-V8M:       @ %bb.0: @ %entry
; CHECK-V8M-NEXT:    str r0, [r0, #8]
; CHECK-V8M-NEXT:    adds r0, #8
; CHECK-V8M-NEXT:    bx lr
;
; CHECK-V8A-LABEL: legal_pre_inc_store_needs_copy_2:
; CHECK-V8A:       @ %bb.0: @ %entry
; CHECK-V8A-NEXT:    str r0, [r0, #8]
; CHECK-V8A-NEXT:    add r0, r0, #8
; CHECK-V8A-NEXT:    bx lr
entry:
  %ptr = inttoptr i32 %base to ptr
  %ptr.to.use = getelementptr i32, ptr %ptr, i32 2
  store i32 %base, ptr %ptr.to.use, align 4
  ret ptr %ptr.to.use
}