; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=arm-unknown | FileCheck %s
; RUN: llc < %s -mtriple=armv6-unknown | FileCheck %s --check-prefix=CHECK-ARMv6
; RUN: llc < %s -mtriple=thumbv6m-none-eabi | FileCheck %s --check-prefix=CHECK-THUMBv6
; RUN: llc < %s -mtriple=thumbv7m-none-eabi | FileCheck %s --check-prefix=CHECK-THUMBv7

; ptr p; // p is 1 byte aligned
; (i32) p[0] | ((i32) p[1] << 8) | ((i32) p[2] << 16) | ((i32) p[3] << 24)
define i32 @load_i32_by_i8_unaligned(ptr %arg) {
; CHECK-LABEL: load_i32_by_i8_unaligned:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    ldrb r2, [r0, #1]
; CHECK-NEXT:    ldrb r1, [r0]
; CHECK-NEXT:    ldrb r3, [r0, #2]
; CHECK-NEXT:    ldrb r0, [r0, #3]
; CHECK-NEXT:    orr r1, r1, r2, lsl #8
; CHECK-NEXT:    orr r1, r1, r3, lsl #16
; CHECK-NEXT:    orr r0, r1, r0, lsl #24
; CHECK-NEXT:    mov pc, lr
;
; CHECK-ARMv6-LABEL: load_i32_by_i8_unaligned:
; CHECK-ARMv6:       @ %bb.0:
; CHECK-ARMv6-NEXT:    ldrb r2, [r0, #1]
; CHECK-ARMv6-NEXT:    ldrb r1, [r0]
; CHECK-ARMv6-NEXT:    ldrb r3, [r0, #2]
; CHECK-ARMv6-NEXT:    ldrb r0, [r0, #3]
; CHECK-ARMv6-NEXT:    orr r1, r1, r2, lsl #8
; CHECK-ARMv6-NEXT:    orr r1, r1, r3, lsl #16
; CHECK-ARMv6-NEXT:    orr r0, r1, r0, lsl #24
; CHECK-ARMv6-NEXT:    bx lr
;
; CHECK-THUMBv6-LABEL: load_i32_by_i8_unaligned:
; CHECK-THUMBv6:       @ %bb.0:
; CHECK-THUMBv6-NEXT:    ldrb r1, [r0]
; CHECK-THUMBv6-NEXT:    ldrb r2, [r0, #1]
; CHECK-THUMBv6-NEXT:    lsls r2, r2, #8
; CHECK-THUMBv6-NEXT:    adds r1, r2, r1
; CHECK-THUMBv6-NEXT:    ldrb r2, [r0, #2]
; CHECK-THUMBv6-NEXT:    lsls r2, r2, #16
; CHECK-THUMBv6-NEXT:    adds r1, r1, r2
; CHECK-THUMBv6-NEXT:    ldrb r0, [r0, #3]
; CHECK-THUMBv6-NEXT:    lsls r0, r0, #24
; CHECK-THUMBv6-NEXT:    adds r0, r1, r0
; CHECK-THUMBv6-NEXT:    bx lr
;
; CHECK-THUMBv7-LABEL: load_i32_by_i8_unaligned:
; CHECK-THUMBv7:       @ %bb.0:
; CHECK-THUMBv7-NEXT:    ldr r0, [r0]
; CHECK-THUMBv7-NEXT:    bx lr

  %tmp2 = load i8, ptr %arg, align 1
  %tmp3 = zext i8 %tmp2 to i32
  %tmp4 = getelementptr inbounds i8, ptr %arg, i32 1
  %tmp5 = load i8, ptr %tmp4, align 1
  %tmp6 = zext i8 %tmp5 to i32
  %tmp7 = shl nuw nsw i32 %tmp6, 8
  %tmp8 = or i32 %tmp7, %tmp3
  %tmp9 = getelementptr inbounds i8, ptr %arg, i32 2
  %tmp10 = load i8, ptr %tmp9, align 1
  %tmp11 = zext i8 %tmp10 to i32
  %tmp12 = shl nuw nsw i32 %tmp11, 16
  %tmp13 = or i32 %tmp8, %tmp12
  %tmp14 = getelementptr inbounds i8, ptr %arg, i32 3
  %tmp15 = load i8, ptr %tmp14, align 1
  %tmp16 = zext i8 %tmp15 to i32
  %tmp17 = shl nuw nsw i32 %tmp16, 24
  %tmp18 = or i32 %tmp13, %tmp17
  ret i32 %tmp18
}

; ptr p; // p is 4 byte aligned
; (i32) p[0] | ((i32) p[1] << 8) | ((i32) p[2] << 16) | ((i32) p[3] << 24)
define i32 @load_i32_by_i8_aligned(ptr %arg) {
; CHECK-LABEL: load_i32_by_i8_aligned:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    ldr r0, [r0]
; CHECK-NEXT:    mov pc, lr
;
; CHECK-ARMv6-LABEL: load_i32_by_i8_aligned:
; CHECK-ARMv6:       @ %bb.0:
; CHECK-ARMv6-NEXT:    ldr r0, [r0]
; CHECK-ARMv6-NEXT:    bx lr
;
; CHECK-THUMBv6-LABEL: load_i32_by_i8_aligned:
; CHECK-THUMBv6:       @ %bb.0:
; CHECK-THUMBv6-NEXT:    ldr r0, [r0]
; CHECK-THUMBv6-NEXT:    bx lr
;
; CHECK-THUMBv7-LABEL: load_i32_by_i8_aligned:
; CHECK-THUMBv7:       @ %bb.0:
; CHECK-THUMBv7-NEXT:    ldr r0, [r0]
; CHECK-THUMBv7-NEXT:    bx lr

  %tmp2 = load i8, ptr %arg, align 4
  %tmp3 = zext i8 %tmp2 to i32
  %tmp4 = getelementptr inbounds i8, ptr %arg, i32 1
  %tmp5 = load i8, ptr %tmp4, align 1
  %tmp6 = zext i8 %tmp5 to i32
  %tmp7 = shl nuw nsw i32 %tmp6, 8
  %tmp8 = or i32 %tmp7, %tmp3
  %tmp9 = getelementptr inbounds i8, ptr %arg, i32 2
  %tmp10 = load i8, ptr %tmp9, align 1
  %tmp11 = zext i8 %tmp10 to i32
  %tmp12 = shl nuw nsw i32 %tmp11, 16
  %tmp13 = or i32 %tmp8, %tmp12
  %tmp14 = getelementptr inbounds i8, ptr %arg, i32 3
  %tmp15 = load i8, ptr %tmp14, align 1
  %tmp16 = zext i8 %tmp15 to i32
  %tmp17 = shl nuw nsw i32 %tmp16, 24
  %tmp18 = or i32 %tmp13, %tmp17
  ret i32 %tmp18
}

; ptr p; // p is 4 byte aligned
; ((i32) p[0] << 24) | ((i32) p[1] << 16) | ((i32) p[2] << 8) | (i32) p[3]
define i32 @load_i32_by_i8_bswap(ptr %arg) {
; BSWAP is not supported by 32 bit target
; CHECK-LABEL: load_i32_by_i8_bswap:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    mov r1, #255
; CHECK-NEXT:    ldr r0, [r0]
; CHECK-NEXT:    orr r1, r1, #16711680
; CHECK-NEXT:    and r2, r0, r1
; CHECK-NEXT:    and r0, r1, r0, ror #24
; CHECK-NEXT:    orr r0, r0, r2, ror #8
; CHECK-NEXT:    mov pc, lr
;
; CHECK-ARMv6-LABEL: load_i32_by_i8_bswap:
; CHECK-ARMv6:       @ %bb.0:
; CHECK-ARMv6-NEXT:    ldr r0, [r0]
; CHECK-ARMv6-NEXT:    rev r0, r0
; CHECK-ARMv6-NEXT:    bx lr
;
; CHECK-THUMBv6-LABEL: load_i32_by_i8_bswap:
; CHECK-THUMBv6:       @ %bb.0:
; CHECK-THUMBv6-NEXT:    ldr r0, [r0]
; CHECK-THUMBv6-NEXT:    rev r0, r0
; CHECK-THUMBv6-NEXT:    bx lr
;
; CHECK-THUMBv7-LABEL: load_i32_by_i8_bswap:
; CHECK-THUMBv7:       @ %bb.0:
; CHECK-THUMBv7-NEXT:    ldr r0, [r0]
; CHECK-THUMBv7-NEXT:    rev r0, r0
; CHECK-THUMBv7-NEXT:    bx lr

  %tmp1 = load i8, ptr %arg, align 4
  %tmp2 = zext i8 %tmp1 to i32
  %tmp3 = shl nuw nsw i32 %tmp2, 24
  %tmp4 = getelementptr inbounds i8, ptr %arg, i32 1
  %tmp5 = load i8, ptr %tmp4, align 1
  %tmp6 = zext i8 %tmp5 to i32
  %tmp7 = shl nuw nsw i32 %tmp6, 16
  %tmp8 = or i32 %tmp7, %tmp3
  %tmp9 = getelementptr inbounds i8, ptr %arg, i32 2
  %tmp10 = load i8, ptr %tmp9, align 1
  %tmp11 = zext i8 %tmp10 to i32
  %tmp12 = shl nuw nsw i32 %tmp11, 8
  %tmp13 = or i32 %tmp8, %tmp12
  %tmp14 = getelementptr inbounds i8, ptr %arg, i32 3
  %tmp15 = load i8, ptr %tmp14, align 1
  %tmp16 = zext i8 %tmp15 to i32
  %tmp17 = or i32 %tmp13, %tmp16
  ret i32 %tmp17
}

; ptr p; // p is 8 byte aligned
; (i64) p[0] | ((i64) p[1] << 8) | ((i64) p[2] << 16) | ((i64) p[3] << 24) | ((i64) p[4] << 32) | ((i64) p[5] << 40) | ((i64) p[6] << 48) | ((i64) p[7] << 56)
define i64 @load_i64_by_i8(ptr %arg) {
; CHECK-LABEL: load_i64_by_i8:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    ldr r2, [r0]
; CHECK-NEXT:    ldr r1, [r0, #4]
; CHECK-NEXT:    mov r0, r2
; CHECK-NEXT:    mov pc, lr
;
; CHECK-ARMv6-LABEL: load_i64_by_i8:
; CHECK-ARMv6:       @ %bb.0:
; CHECK-ARMv6-NEXT:    ldrd r0, r1, [r0]
; CHECK-ARMv6-NEXT:    bx lr
;
; CHECK-THUMBv6-LABEL: load_i64_by_i8:
; CHECK-THUMBv6:       @ %bb.0:
; CHECK-THUMBv6-NEXT:    ldr r2, [r0]
; CHECK-THUMBv6-NEXT:    ldr r1, [r0, #4]
; CHECK-THUMBv6-NEXT:    mov r0, r2
; CHECK-THUMBv6-NEXT:    bx lr
;
; CHECK-THUMBv7-LABEL: load_i64_by_i8:
; CHECK-THUMBv7:       @ %bb.0:
; CHECK-THUMBv7-NEXT:    ldrd r0, r1, [r0]
; CHECK-THUMBv7-NEXT:    bx lr

  %tmp1 = load i8, ptr %arg, align 8
  %tmp2 = zext i8 %tmp1 to i64
  %tmp3 = getelementptr inbounds i8, ptr %arg, i64 1
  %tmp4 = load i8, ptr %tmp3, align 1
  %tmp5 = zext i8 %tmp4 to i64
  %tmp6 = shl nuw nsw i64 %tmp5, 8
  %tmp7 = or i64 %tmp6, %tmp2
  %tmp8 = getelementptr inbounds i8, ptr %arg, i64 2
  %tmp9 = load i8, ptr %tmp8, align 1
  %tmp10 = zext i8 %tmp9 to i64
  %tmp11 = shl nuw nsw i64 %tmp10, 16
  %tmp12 = or i64 %tmp7, %tmp11
  %tmp13 = getelementptr inbounds i8, ptr %arg, i64 3
  %tmp14 = load i8, ptr %tmp13, align 1
  %tmp15 = zext i8 %tmp14 to i64
  %tmp16 = shl nuw nsw i64 %tmp15, 24
  %tmp17 = or i64 %tmp12, %tmp16
  %tmp18 = getelementptr inbounds i8, ptr %arg, i64 4
  %tmp19 = load i8, ptr %tmp18, align 1
  %tmp20 = zext i8 %tmp19 to i64
  %tmp21 = shl nuw nsw i64 %tmp20, 32
  %tmp22 = or i64 %tmp17, %tmp21
  %tmp23 = getelementptr inbounds i8, ptr %arg, i64 5
  %tmp24 = load i8, ptr %tmp23, align 1
  %tmp25 = zext i8 %tmp24 to i64
  %tmp26 = shl nuw nsw i64 %tmp25, 40
  %tmp27 = or i64 %tmp22, %tmp26
  %tmp28 = getelementptr inbounds i8, ptr %arg, i64 6
  %tmp29 = load i8, ptr %tmp28, align 1
  %tmp30 = zext i8 %tmp29 to i64
  %tmp31 = shl nuw nsw i64 %tmp30, 48
  %tmp32 = or i64 %tmp27, %tmp31
  %tmp33 = getelementptr inbounds i8, ptr %arg, i64 7
  %tmp34 = load i8, ptr %tmp33, align 1
  %tmp35 = zext i8 %tmp34 to i64
  %tmp36 = shl nuw i64 %tmp35, 56
  %tmp37 = or i64 %tmp32, %tmp36
  ret i64 %tmp37
}

; ptr p; // p is 8 byte aligned
; ((i64) p[0] << 56) | ((i64) p[1] << 48) | ((i64) p[2] << 40) | ((i64) p[3] << 32) | ((i64) p[4] << 24) | ((i64) p[5] << 16) | ((i64) p[6] << 8) | (i64) p[7]
define i64 @load_i64_by_i8_bswap(ptr %arg) {
; CHECK-LABEL: load_i64_by_i8_bswap:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    mov r2, #255
; CHECK-NEXT:    ldr r1, [r0]
; CHECK-NEXT:    ldr r0, [r0, #4]
; CHECK-NEXT:    orr r2, r2, #16711680
; CHECK-NEXT:    and r3, r0, r2
; CHECK-NEXT:    and r0, r2, r0, ror #24
; CHECK-NEXT:    orr r0, r0, r3, ror #8
; CHECK-NEXT:    and r3, r1, r2
; CHECK-NEXT:    and r1, r2, r1, ror #24
; CHECK-NEXT:    orr r1, r1, r3, ror #8
; CHECK-NEXT:    mov pc, lr
;
; CHECK-ARMv6-LABEL: load_i64_by_i8_bswap:
; CHECK-ARMv6:       @ %bb.0:
; CHECK-ARMv6-NEXT:    ldrd r2, r3, [r0]
; CHECK-ARMv6-NEXT:    rev r0, r3
; CHECK-ARMv6-NEXT:    rev r1, r2
; CHECK-ARMv6-NEXT:    bx lr
;
; CHECK-THUMBv6-LABEL: load_i64_by_i8_bswap:
; CHECK-THUMBv6:       @ %bb.0:
; CHECK-THUMBv6-NEXT:    ldr r1, [r0]
; CHECK-THUMBv6-NEXT:    ldr r0, [r0, #4]
; CHECK-THUMBv6-NEXT:    rev r0, r0
; CHECK-THUMBv6-NEXT:    rev r1, r1
; CHECK-THUMBv6-NEXT:    bx lr
;
; CHECK-THUMBv7-LABEL: load_i64_by_i8_bswap:
; CHECK-THUMBv7:       @ %bb.0:
; CHECK-THUMBv7-NEXT:    ldrd r1, r0, [r0]
; CHECK-THUMBv7-NEXT:    rev r0, r0
; CHECK-THUMBv7-NEXT:    rev r1, r1
; CHECK-THUMBv7-NEXT:    bx lr

  %tmp1 = load i8, ptr %arg, align 8
  %tmp2 = zext i8 %tmp1 to i64
  %tmp3 = shl nuw i64 %tmp2, 56
  %tmp4 = getelementptr inbounds i8, ptr %arg, i64 1
  %tmp5 = load i8, ptr %tmp4, align 1
  %tmp6 = zext i8 %tmp5 to i64
  %tmp7 = shl nuw nsw i64 %tmp6, 48
  %tmp8 = or i64 %tmp7, %tmp3
  %tmp9 = getelementptr inbounds i8, ptr %arg, i64 2
  %tmp10 = load i8, ptr %tmp9, align 1
  %tmp11 = zext i8 %tmp10 to i64
  %tmp12 = shl nuw nsw i64 %tmp11, 40
  %tmp13 = or i64 %tmp8, %tmp12
  %tmp14 = getelementptr inbounds i8, ptr %arg, i64 3
  %tmp15 = load i8, ptr %tmp14, align 1
  %tmp16 = zext i8 %tmp15 to i64
  %tmp17 = shl nuw nsw i64 %tmp16, 32
  %tmp18 = or i64 %tmp13, %tmp17
  %tmp19 = getelementptr inbounds i8, ptr %arg, i64 4
  %tmp20 = load i8, ptr %tmp19, align 1
  %tmp21 = zext i8 %tmp20 to i64
  %tmp22 = shl nuw nsw i64 %tmp21, 24
  %tmp23 = or i64 %tmp18, %tmp22
  %tmp24 = getelementptr inbounds i8, ptr %arg, i64 5
  %tmp25 = load i8, ptr %tmp24, align 1
  %tmp26 = zext i8 %tmp25 to i64
  %tmp27 = shl nuw nsw i64 %tmp26, 16
  %tmp28 = or i64 %tmp23, %tmp27
  %tmp29 = getelementptr inbounds i8, ptr %arg, i64 6
  %tmp30 = load i8, ptr %tmp29, align 1
  %tmp31 = zext i8 %tmp30 to i64
  %tmp32 = shl nuw nsw i64 %tmp31, 8
  %tmp33 = or i64 %tmp28, %tmp32
  %tmp34 = getelementptr inbounds i8, ptr %arg, i64 7
  %tmp35 = load i8, ptr %tmp34, align 1
  %tmp36 = zext i8 %tmp35 to i64
  %tmp37 = or i64 %tmp33, %tmp36
  ret i64 %tmp37
}

; ptr p; // p[1] is 4 byte aligned
; (i32) p[1] | ((i32) p[2] << 8) | ((i32) p[3] << 16) | ((i32) p[4] << 24)
define i32 @load_i32_by_i8_nonzero_offset(ptr %arg) {
; CHECK-LABEL: load_i32_by_i8_nonzero_offset:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    ldr r0, [r0, #1]
; CHECK-NEXT:    mov pc, lr
;
; CHECK-ARMv6-LABEL: load_i32_by_i8_nonzero_offset:
; CHECK-ARMv6:       @ %bb.0:
; CHECK-ARMv6-NEXT:    ldr r0, [r0, #1]
; CHECK-ARMv6-NEXT:    bx lr
;
; CHECK-THUMBv6-LABEL: load_i32_by_i8_nonzero_offset:
; CHECK-THUMBv6:       @ %bb.0:
; CHECK-THUMBv6-NEXT:    movs r1, #1
; CHECK-THUMBv6-NEXT:    ldr r0, [r0, r1]
; CHECK-THUMBv6-NEXT:    bx lr
;
; CHECK-THUMBv7-LABEL: load_i32_by_i8_nonzero_offset:
; CHECK-THUMBv7:       @ %bb.0:
; CHECK-THUMBv7-NEXT:    ldr.w r0, [r0, #1]
; CHECK-THUMBv7-NEXT:    bx lr


  %tmp1 = getelementptr inbounds i8, ptr %arg, i32 1
  %tmp2 = load i8, ptr %tmp1, align 4
  %tmp3 = zext i8 %tmp2 to i32
  %tmp4 = getelementptr inbounds i8, ptr %arg, i32 2
  %tmp5 = load i8, ptr %tmp4, align 1
  %tmp6 = zext i8 %tmp5 to i32
  %tmp7 = shl nuw nsw i32 %tmp6, 8
  %tmp8 = or i32 %tmp7, %tmp3
  %tmp9 = getelementptr inbounds i8, ptr %arg, i32 3
  %tmp10 = load i8, ptr %tmp9, align 1
  %tmp11 = zext i8 %tmp10 to i32
  %tmp12 = shl nuw nsw i32 %tmp11, 16
  %tmp13 = or i32 %tmp8, %tmp12
  %tmp14 = getelementptr inbounds i8, ptr %arg, i32 4
  %tmp15 = load i8, ptr %tmp14, align 1
  %tmp16 = zext i8 %tmp15 to i32
  %tmp17 = shl nuw nsw i32 %tmp16, 24
  %tmp18 = or i32 %tmp13, %tmp17
  ret i32 %tmp18
}

; ptr p; // p[-4] is 4 byte aligned
; (i32) p[-4] | ((i32) p[-3] << 8) | ((i32) p[-2] << 16) | ((i32) p[-1] << 24)
define i32 @load_i32_by_i8_neg_offset(ptr %arg) {
; CHECK-LABEL: load_i32_by_i8_neg_offset:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    ldr r0, [r0, #-4]
; CHECK-NEXT:    mov pc, lr
;
; CHECK-ARMv6-LABEL: load_i32_by_i8_neg_offset:
; CHECK-ARMv6:       @ %bb.0:
; CHECK-ARMv6-NEXT:    ldr r0, [r0, #-4]
; CHECK-ARMv6-NEXT:    bx lr
;
; CHECK-THUMBv6-LABEL: load_i32_by_i8_neg_offset:
; CHECK-THUMBv6:       @ %bb.0:
; CHECK-THUMBv6-NEXT:    subs r0, r0, #4
; CHECK-THUMBv6-NEXT:    ldr r0, [r0]
; CHECK-THUMBv6-NEXT:    bx lr
;
; CHECK-THUMBv7-LABEL: load_i32_by_i8_neg_offset:
; CHECK-THUMBv7:       @ %bb.0:
; CHECK-THUMBv7-NEXT:    ldr r0, [r0, #-4]
; CHECK-THUMBv7-NEXT:    bx lr


  %tmp1 = getelementptr inbounds i8, ptr %arg, i32 -4
  %tmp2 = load i8, ptr %tmp1, align 4
  %tmp3 = zext i8 %tmp2 to i32
  %tmp4 = getelementptr inbounds i8, ptr %arg, i32 -3
  %tmp5 = load i8, ptr %tmp4, align 1
  %tmp6 = zext i8 %tmp5 to i32
  %tmp7 = shl nuw nsw i32 %tmp6, 8
  %tmp8 = or i32 %tmp7, %tmp3
  %tmp9 = getelementptr inbounds i8, ptr %arg, i32 -2
  %tmp10 = load i8, ptr %tmp9, align 1
  %tmp11 = zext i8 %tmp10 to i32
  %tmp12 = shl nuw nsw i32 %tmp11, 16
  %tmp13 = or i32 %tmp8, %tmp12
  %tmp14 = getelementptr inbounds i8, ptr %arg, i32 -1
  %tmp15 = load i8, ptr %tmp14, align 1
  %tmp16 = zext i8 %tmp15 to i32
  %tmp17 = shl nuw nsw i32 %tmp16, 24
  %tmp18 = or i32 %tmp13, %tmp17
  ret i32 %tmp18
}

; ptr p; // p[1] is 4 byte aligned
; (i32) p[4] | ((i32) p[3] << 8) | ((i32) p[2] << 16) | ((i32) p[1] << 24)
define i32 @load_i32_by_i8_nonzero_offset_bswap(ptr %arg) {
; CHECK-LABEL: load_i32_by_i8_nonzero_offset_bswap:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    mov r1, #255
; CHECK-NEXT:    ldr r0, [r0, #1]
; CHECK-NEXT:    orr r1, r1, #16711680
; CHECK-NEXT:    and r2, r0, r1
; CHECK-NEXT:    and r0, r1, r0, ror #24
; CHECK-NEXT:    orr r0, r0, r2, ror #8
; CHECK-NEXT:    mov pc, lr
;
; CHECK-ARMv6-LABEL: load_i32_by_i8_nonzero_offset_bswap:
; CHECK-ARMv6:       @ %bb.0:
; CHECK-ARMv6-NEXT:    ldr r0, [r0, #1]
; CHECK-ARMv6-NEXT:    rev r0, r0
; CHECK-ARMv6-NEXT:    bx lr
;
; CHECK-THUMBv6-LABEL: load_i32_by_i8_nonzero_offset_bswap:
; CHECK-THUMBv6:       @ %bb.0:
; CHECK-THUMBv6-NEXT:    movs r1, #1
; CHECK-THUMBv6-NEXT:    ldr r0, [r0, r1]
; CHECK-THUMBv6-NEXT:    rev r0, r0
; CHECK-THUMBv6-NEXT:    bx lr
;
; CHECK-THUMBv7-LABEL: load_i32_by_i8_nonzero_offset_bswap:
; CHECK-THUMBv7:       @ %bb.0:
; CHECK-THUMBv7-NEXT:    ldr.w r0, [r0, #1]
; CHECK-THUMBv7-NEXT:    rev r0, r0
; CHECK-THUMBv7-NEXT:    bx lr


  %tmp1 = getelementptr inbounds i8, ptr %arg, i32 4
  %tmp2 = load i8, ptr %tmp1, align 1
  %tmp3 = zext i8 %tmp2 to i32
  %tmp4 = getelementptr inbounds i8, ptr %arg, i32 3
  %tmp5 = load i8, ptr %tmp4, align 1
  %tmp6 = zext i8 %tmp5 to i32
  %tmp7 = shl nuw nsw i32 %tmp6, 8
  %tmp8 = or i32 %tmp7, %tmp3
  %tmp9 = getelementptr inbounds i8, ptr %arg, i32 2
  %tmp10 = load i8, ptr %tmp9, align 1
  %tmp11 = zext i8 %tmp10 to i32
  %tmp12 = shl nuw nsw i32 %tmp11, 16
  %tmp13 = or i32 %tmp8, %tmp12
  %tmp14 = getelementptr inbounds i8, ptr %arg, i32 1
  %tmp15 = load i8, ptr %tmp14, align 4
  %tmp16 = zext i8 %tmp15 to i32
  %tmp17 = shl nuw nsw i32 %tmp16, 24
  %tmp18 = or i32 %tmp13, %tmp17
  ret i32 %tmp18
}

; ptr p; // p[-4] is 4 byte aligned
; (i32) p[-1] | ((i32) p[-2] << 8) | ((i32) p[-3] << 16) | ((i32) p[-4] << 24)
define i32 @load_i32_by_i8_neg_offset_bswap(ptr %arg) {
; CHECK-LABEL: load_i32_by_i8_neg_offset_bswap:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    mov r1, #255
; CHECK-NEXT:    ldr r0, [r0, #-4]
; CHECK-NEXT:    orr r1, r1, #16711680
; CHECK-NEXT:    and r2, r0, r1
; CHECK-NEXT:    and r0, r1, r0, ror #24
; CHECK-NEXT:    orr r0, r0, r2, ror #8
; CHECK-NEXT:    mov pc, lr
;
; CHECK-ARMv6-LABEL: load_i32_by_i8_neg_offset_bswap:
; CHECK-ARMv6:       @ %bb.0:
; CHECK-ARMv6-NEXT:    ldr r0, [r0, #-4]
; CHECK-ARMv6-NEXT:    rev r0, r0
; CHECK-ARMv6-NEXT:    bx lr
;
; CHECK-THUMBv6-LABEL: load_i32_by_i8_neg_offset_bswap:
; CHECK-THUMBv6:       @ %bb.0:
; CHECK-THUMBv6-NEXT:    subs r0, r0, #4
; CHECK-THUMBv6-NEXT:    ldr r0, [r0]
; CHECK-THUMBv6-NEXT:    rev r0, r0
; CHECK-THUMBv6-NEXT:    bx lr
;
; CHECK-THUMBv7-LABEL: load_i32_by_i8_neg_offset_bswap:
; CHECK-THUMBv7:       @ %bb.0:
; CHECK-THUMBv7-NEXT:    ldr r0, [r0, #-4]
; CHECK-THUMBv7-NEXT:    rev r0, r0
; CHECK-THUMBv7-NEXT:    bx lr


  %tmp1 = getelementptr inbounds i8, ptr %arg, i32 -1
  %tmp2 = load i8, ptr %tmp1, align 1
  %tmp3 = zext i8 %tmp2 to i32
  %tmp4 = getelementptr inbounds i8, ptr %arg, i32 -2
  %tmp5 = load i8, ptr %tmp4, align 1
  %tmp6 = zext i8 %tmp5 to i32
  %tmp7 = shl nuw nsw i32 %tmp6, 8
  %tmp8 = or i32 %tmp7, %tmp3
  %tmp9 = getelementptr inbounds i8, ptr %arg, i32 -3
  %tmp10 = load i8, ptr %tmp9, align 1
  %tmp11 = zext i8 %tmp10 to i32
  %tmp12 = shl nuw nsw i32 %tmp11, 16
  %tmp13 = or i32 %tmp8, %tmp12
  %tmp14 = getelementptr inbounds i8, ptr %arg, i32 -4
  %tmp15 = load i8, ptr %tmp14, align 4
  %tmp16 = zext i8 %tmp15 to i32
  %tmp17 = shl nuw nsw i32 %tmp16, 24
  %tmp18 = or i32 %tmp13, %tmp17
  ret i32 %tmp18
}

declare i16 @llvm.bswap.i16(i16)

; ptr p; // p is 4 byte aligned
; (i32) bswap(p[1]) | (i32) bswap(p[0] << 16)
define i32 @load_i32_by_bswap_i16(ptr %arg) {
; CHECK-LABEL: load_i32_by_bswap_i16:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    mov r1, #255
; CHECK-NEXT:    ldr r0, [r0]
; CHECK-NEXT:    orr r1, r1, #16711680
; CHECK-NEXT:    and r2, r0, r1
; CHECK-NEXT:    and r0, r1, r0, ror #24
; CHECK-NEXT:    orr r0, r0, r2, ror #8
; CHECK-NEXT:    mov pc, lr
;
; CHECK-ARMv6-LABEL: load_i32_by_bswap_i16:
; CHECK-ARMv6:       @ %bb.0:
; CHECK-ARMv6-NEXT:    ldr r0, [r0]
; CHECK-ARMv6-NEXT:    rev r0, r0
; CHECK-ARMv6-NEXT:    bx lr
;
; CHECK-THUMBv6-LABEL: load_i32_by_bswap_i16:
; CHECK-THUMBv6:       @ %bb.0:
; CHECK-THUMBv6-NEXT:    ldr r0, [r0]
; CHECK-THUMBv6-NEXT:    rev r0, r0
; CHECK-THUMBv6-NEXT:    bx lr
;
; CHECK-THUMBv7-LABEL: load_i32_by_bswap_i16:
; CHECK-THUMBv7:       @ %bb.0:
; CHECK-THUMBv7-NEXT:    ldr r0, [r0]
; CHECK-THUMBv7-NEXT:    rev r0, r0
; CHECK-THUMBv7-NEXT:    bx lr


  %tmp1 = load i16, ptr %arg, align 4
  %tmp11 = call i16 @llvm.bswap.i16(i16 %tmp1)
  %tmp2 = zext i16 %tmp11 to i32
  %tmp3 = getelementptr inbounds i16, ptr %arg, i32 1
  %tmp4 = load i16, ptr %tmp3, align 1
  %tmp41 = call i16 @llvm.bswap.i16(i16 %tmp4)
  %tmp5 = zext i16 %tmp41 to i32
  %tmp6 = shl nuw nsw i32 %tmp2, 16
  %tmp7 = or i32 %tmp6, %tmp5
  ret i32 %tmp7
}

; ptr p;
; (i32) p[0] | (sext(p[1] << 16) to i32)
define i32 @load_i32_by_sext_i16(ptr %arg) {
; CHECK-LABEL: load_i32_by_sext_i16:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    ldr r0, [r0]
; CHECK-NEXT:    mov pc, lr
;
; CHECK-ARMv6-LABEL: load_i32_by_sext_i16:
; CHECK-ARMv6:       @ %bb.0:
; CHECK-ARMv6-NEXT:    ldr r0, [r0]
; CHECK-ARMv6-NEXT:    bx lr
;
; CHECK-THUMBv6-LABEL: load_i32_by_sext_i16:
; CHECK-THUMBv6:       @ %bb.0:
; CHECK-THUMBv6-NEXT:    ldr r0, [r0]
; CHECK-THUMBv6-NEXT:    bx lr
;
; CHECK-THUMBv7-LABEL: load_i32_by_sext_i16:
; CHECK-THUMBv7:       @ %bb.0:
; CHECK-THUMBv7-NEXT:    ldr r0, [r0]
; CHECK-THUMBv7-NEXT:    bx lr
  %tmp1 = load i16, ptr %arg, align 4
  %tmp2 = zext i16 %tmp1 to i32
  %tmp3 = getelementptr inbounds i16, ptr %arg, i32 1
  %tmp4 = load i16, ptr %tmp3, align 1
  %tmp5 = sext i16 %tmp4 to i32
  %tmp6 = shl nuw nsw i32 %tmp5, 16
  %tmp7 = or i32 %tmp6, %tmp2
  ret i32 %tmp7
}

; ptr arg; i32 i;
; p = arg + 12;
; (i32) p[i] | ((i32) p[i + 1] << 8) | ((i32) p[i + 2] << 16) | ((i32) p[i + 3] << 24)
define i32 @load_i32_by_i8_base_offset_index(ptr %arg, i32 %i) {
; CHECK-LABEL: load_i32_by_i8_base_offset_index:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    add r0, r0, r1
; CHECK-NEXT:    ldr r0, [r0, #12]
; CHECK-NEXT:    mov pc, lr
;
; CHECK-ARMv6-LABEL: load_i32_by_i8_base_offset_index:
; CHECK-ARMv6:       @ %bb.0:
; CHECK-ARMv6-NEXT:    add r0, r0, r1
; CHECK-ARMv6-NEXT:    ldr r0, [r0, #12]
; CHECK-ARMv6-NEXT:    bx lr
;
; CHECK-THUMBv6-LABEL: load_i32_by_i8_base_offset_index:
; CHECK-THUMBv6:       @ %bb.0:
; CHECK-THUMBv6-NEXT:    adds r0, r0, r1
; CHECK-THUMBv6-NEXT:    ldr r0, [r0, #12]
; CHECK-THUMBv6-NEXT:    bx lr
;
; CHECK-THUMBv7-LABEL: load_i32_by_i8_base_offset_index:
; CHECK-THUMBv7:       @ %bb.0:
; CHECK-THUMBv7-NEXT:    add r0, r1
; CHECK-THUMBv7-NEXT:    ldr r0, [r0, #12]
; CHECK-THUMBv7-NEXT:    bx lr

  %tmp = add nuw nsw i32 %i, 3
  %tmp2 = add nuw nsw i32 %i, 2
  %tmp3 = add nuw nsw i32 %i, 1
  %tmp4 = getelementptr inbounds i8, ptr %arg, i64 12
  %tmp5 = zext i32 %i to i64
  %tmp6 = getelementptr inbounds i8, ptr %tmp4, i64 %tmp5
  %tmp7 = load i8, ptr %tmp6, align 4
  %tmp8 = zext i8 %tmp7 to i32
  %tmp9 = zext i32 %tmp3 to i64
  %tmp10 = getelementptr inbounds i8, ptr %tmp4, i64 %tmp9
  %tmp11 = load i8, ptr %tmp10, align 1
  %tmp12 = zext i8 %tmp11 to i32
  %tmp13 = shl nuw nsw i32 %tmp12, 8
  %tmp14 = or i32 %tmp13, %tmp8
  %tmp15 = zext i32 %tmp2 to i64
  %tmp16 = getelementptr inbounds i8, ptr %tmp4, i64 %tmp15
  %tmp17 = load i8, ptr %tmp16, align 1
  %tmp18 = zext i8 %tmp17 to i32
  %tmp19 = shl nuw nsw i32 %tmp18, 16
  %tmp20 = or i32 %tmp14, %tmp19
  %tmp21 = zext i32 %tmp to i64
  %tmp22 = getelementptr inbounds i8, ptr %tmp4, i64 %tmp21
  %tmp23 = load i8, ptr %tmp22, align 1
  %tmp24 = zext i8 %tmp23 to i32
  %tmp25 = shl nuw i32 %tmp24, 24
  %tmp26 = or i32 %tmp20, %tmp25
  ret i32 %tmp26
}

; ptr arg; i32 i;
; p = arg + 12;
; (i32) p[i + 1] | ((i32) p[i + 2] << 8) | ((i32) p[i + 3] << 16) | ((i32) p[i + 4] << 24)
define i32 @load_i32_by_i8_base_offset_index_2(ptr %arg, i32 %i) {
; CHECK-LABEL: load_i32_by_i8_base_offset_index_2:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    add r0, r1, r0
; CHECK-NEXT:    ldr r0, [r0, #13]
; CHECK-NEXT:    mov pc, lr
;
; CHECK-ARMv6-LABEL: load_i32_by_i8_base_offset_index_2:
; CHECK-ARMv6:       @ %bb.0:
; CHECK-ARMv6-NEXT:    add r0, r1, r0
; CHECK-ARMv6-NEXT:    ldr r0, [r0, #13]
; CHECK-ARMv6-NEXT:    bx lr
;
; CHECK-THUMBv6-LABEL: load_i32_by_i8_base_offset_index_2:
; CHECK-THUMBv6:       @ %bb.0:
; CHECK-THUMBv6-NEXT:    adds r0, r1, r0
; CHECK-THUMBv6-NEXT:    movs r1, #13
; CHECK-THUMBv6-NEXT:    ldr r0, [r0, r1]
; CHECK-THUMBv6-NEXT:    bx lr
;
; CHECK-THUMBv7-LABEL: load_i32_by_i8_base_offset_index_2:
; CHECK-THUMBv7:       @ %bb.0:
; CHECK-THUMBv7-NEXT:    add r0, r1
; CHECK-THUMBv7-NEXT:    ldr.w r0, [r0, #13]
; CHECK-THUMBv7-NEXT:    bx lr
  %tmp = add nuw nsw i32 %i, 4
  %tmp2 = add nuw nsw i32 %i, 3
  %tmp3 = add nuw nsw i32 %i, 2
  %tmp4 = getelementptr inbounds i8, ptr %arg, i64 12
  %tmp5 = add nuw nsw i32 %i, 1
  %tmp27 = zext i32 %tmp5 to i64
  %tmp28 = getelementptr inbounds i8, ptr %tmp4, i64 %tmp27
  %tmp29 = load i8, ptr %tmp28, align 4
  %tmp30 = zext i8 %tmp29 to i32
  %tmp31 = zext i32 %tmp3 to i64
  %tmp32 = getelementptr inbounds i8, ptr %tmp4, i64 %tmp31
  %tmp33 = load i8, ptr %tmp32, align 1
  %tmp34 = zext i8 %tmp33 to i32
  %tmp35 = shl nuw nsw i32 %tmp34, 8
  %tmp36 = or i32 %tmp35, %tmp30
  %tmp37 = zext i32 %tmp2 to i64
  %tmp38 = getelementptr inbounds i8, ptr %tmp4, i64 %tmp37
  %tmp39 = load i8, ptr %tmp38, align 1
  %tmp40 = zext i8 %tmp39 to i32
  %tmp41 = shl nuw nsw i32 %tmp40, 16
  %tmp42 = or i32 %tmp36, %tmp41
  %tmp43 = zext i32 %tmp to i64
  %tmp44 = getelementptr inbounds i8, ptr %tmp4, i64 %tmp43
  %tmp45 = load i8, ptr %tmp44, align 1
  %tmp46 = zext i8 %tmp45 to i32
  %tmp47 = shl nuw i32 %tmp46, 24
  %tmp48 = or i32 %tmp42, %tmp47
  ret i32 %tmp48
}

; ptr p; // p is 2 byte aligned
; (i32) p[0] | ((i32) p[1] << 8)
define i32 @zext_load_i32_by_i8(ptr %arg) {
; CHECK-LABEL: zext_load_i32_by_i8:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    ldrh r0, [r0]
; CHECK-NEXT:    mov pc, lr
;
; CHECK-ARMv6-LABEL: zext_load_i32_by_i8:
; CHECK-ARMv6:       @ %bb.0:
; CHECK-ARMv6-NEXT:    ldrh r0, [r0]
; CHECK-ARMv6-NEXT:    bx lr
;
; CHECK-THUMBv6-LABEL: zext_load_i32_by_i8:
; CHECK-THUMBv6:       @ %bb.0:
; CHECK-THUMBv6-NEXT:    ldrh r0, [r0]
; CHECK-THUMBv6-NEXT:    bx lr
;
; CHECK-THUMBv7-LABEL: zext_load_i32_by_i8:
; CHECK-THUMBv7:       @ %bb.0:
; CHECK-THUMBv7-NEXT:    ldrh r0, [r0]
; CHECK-THUMBv7-NEXT:    bx lr

  %tmp2 = load i8, ptr %arg, align 2
  %tmp3 = zext i8 %tmp2 to i32
  %tmp4 = getelementptr inbounds i8, ptr %arg, i32 1
  %tmp5 = load i8, ptr %tmp4, align 1
  %tmp6 = zext i8 %tmp5 to i32
  %tmp7 = shl nuw nsw i32 %tmp6, 8
  %tmp8 = or i32 %tmp7, %tmp3
  ret i32 %tmp8
}

; ptr p; // p is 2 byte aligned
; ((i32) p[0] << 8) | ((i32) p[1] << 16)
define i32 @zext_load_i32_by_i8_shl_8(ptr %arg) {
; CHECK-LABEL: zext_load_i32_by_i8_shl_8:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    ldrb r1, [r0]
; CHECK-NEXT:    ldrb r0, [r0, #1]
; CHECK-NEXT:    lsl r0, r0, #16
; CHECK-NEXT:    orr r0, r0, r1, lsl #8
; CHECK-NEXT:    mov pc, lr
;
; CHECK-ARMv6-LABEL: zext_load_i32_by_i8_shl_8:
; CHECK-ARMv6:       @ %bb.0:
; CHECK-ARMv6-NEXT:    ldrb r1, [r0]
; CHECK-ARMv6-NEXT:    ldrb r0, [r0, #1]
; CHECK-ARMv6-NEXT:    lsl r0, r0, #16
; CHECK-ARMv6-NEXT:    orr r0, r0, r1, lsl #8
; CHECK-ARMv6-NEXT:    bx lr
;
; CHECK-THUMBv6-LABEL: zext_load_i32_by_i8_shl_8:
; CHECK-THUMBv6:       @ %bb.0:
; CHECK-THUMBv6-NEXT:    ldrb r1, [r0]
; CHECK-THUMBv6-NEXT:    lsls r1, r1, #8
; CHECK-THUMBv6-NEXT:    ldrb r0, [r0, #1]
; CHECK-THUMBv6-NEXT:    lsls r0, r0, #16
; CHECK-THUMBv6-NEXT:    adds r0, r0, r1
; CHECK-THUMBv6-NEXT:    bx lr
;
; CHECK-THUMBv7-LABEL: zext_load_i32_by_i8_shl_8:
; CHECK-THUMBv7:       @ %bb.0:
; CHECK-THUMBv7-NEXT:    ldrb r1, [r0]
; CHECK-THUMBv7-NEXT:    ldrb r0, [r0, #1]
; CHECK-THUMBv7-NEXT:    lsls r0, r0, #16
; CHECK-THUMBv7-NEXT:    orr.w r0, r0, r1, lsl #8
; CHECK-THUMBv7-NEXT:    bx lr

  %tmp2 = load i8, ptr %arg, align 2
  %tmp3 = zext i8 %tmp2 to i32
  %tmp30 = shl nuw nsw i32 %tmp3, 8
  %tmp4 = getelementptr inbounds i8, ptr %arg, i32 1
  %tmp5 = load i8, ptr %tmp4, align 1
  %tmp6 = zext i8 %tmp5 to i32
  %tmp7 = shl nuw nsw i32 %tmp6, 16
  %tmp8 = or i32 %tmp7, %tmp30
  ret i32 %tmp8
}

; ptr p; // p is 2 byte aligned
; ((i32) p[0] << 16) | ((i32) p[1] << 24)
define i32 @zext_load_i32_by_i8_shl_16(ptr %arg) {
; CHECK-LABEL: zext_load_i32_by_i8_shl_16:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    ldrb r1, [r0]
; CHECK-NEXT:    ldrb r0, [r0, #1]
; CHECK-NEXT:    lsl r0, r0, #24
; CHECK-NEXT:    orr r0, r0, r1, lsl #16
; CHECK-NEXT:    mov pc, lr
;
; CHECK-ARMv6-LABEL: zext_load_i32_by_i8_shl_16:
; CHECK-ARMv6:       @ %bb.0:
; CHECK-ARMv6-NEXT:    ldrb r1, [r0]
; CHECK-ARMv6-NEXT:    ldrb r0, [r0, #1]
; CHECK-ARMv6-NEXT:    lsl r0, r0, #24
; CHECK-ARMv6-NEXT:    orr r0, r0, r1, lsl #16
; CHECK-ARMv6-NEXT:    bx lr
;
; CHECK-THUMBv6-LABEL: zext_load_i32_by_i8_shl_16:
; CHECK-THUMBv6:       @ %bb.0:
; CHECK-THUMBv6-NEXT:    ldrb r1, [r0]
; CHECK-THUMBv6-NEXT:    lsls r1, r1, #16
; CHECK-THUMBv6-NEXT:    ldrb r0, [r0, #1]
; CHECK-THUMBv6-NEXT:    lsls r0, r0, #24
; CHECK-THUMBv6-NEXT:    adds r0, r0, r1
; CHECK-THUMBv6-NEXT:    bx lr
;
; CHECK-THUMBv7-LABEL: zext_load_i32_by_i8_shl_16:
; CHECK-THUMBv7:       @ %bb.0:
; CHECK-THUMBv7-NEXT:    ldrb r1, [r0]
; CHECK-THUMBv7-NEXT:    ldrb r0, [r0, #1]
; CHECK-THUMBv7-NEXT:    lsls r0, r0, #24
; CHECK-THUMBv7-NEXT:    orr.w r0, r0, r1, lsl #16
; CHECK-THUMBv7-NEXT:    bx lr

  %tmp2 = load i8, ptr %arg, align 2
  %tmp3 = zext i8 %tmp2 to i32
  %tmp30 = shl nuw nsw i32 %tmp3, 16
  %tmp4 = getelementptr inbounds i8, ptr %arg, i32 1
  %tmp5 = load i8, ptr %tmp4, align 1
  %tmp6 = zext i8 %tmp5 to i32
  %tmp7 = shl nuw nsw i32 %tmp6, 24
  %tmp8 = or i32 %tmp7, %tmp30
  ret i32 %tmp8
}

; ptr p; // p is 2 byte aligned
; (i32) p[1] | ((i32) p[0] << 8)
define i32 @zext_load_i32_by_i8_bswap(ptr %arg) {
; CHECK-LABEL: zext_load_i32_by_i8_bswap:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    ldrb r1, [r0]
; CHECK-NEXT:    ldrb r0, [r0, #1]
; CHECK-NEXT:    orr r0, r0, r1, lsl #8
; CHECK-NEXT:    mov pc, lr
;
; CHECK-ARMv6-LABEL: zext_load_i32_by_i8_bswap:
; CHECK-ARMv6:       @ %bb.0:
; CHECK-ARMv6-NEXT:    ldrh r0, [r0]
; CHECK-ARMv6-NEXT:    rev16 r0, r0
; CHECK-ARMv6-NEXT:    bx lr
;
; CHECK-THUMBv6-LABEL: zext_load_i32_by_i8_bswap:
; CHECK-THUMBv6:       @ %bb.0:
; CHECK-THUMBv6-NEXT:    ldrh r0, [r0]
; CHECK-THUMBv6-NEXT:    rev16 r0, r0
; CHECK-THUMBv6-NEXT:    bx lr
;
; CHECK-THUMBv7-LABEL: zext_load_i32_by_i8_bswap:
; CHECK-THUMBv7:       @ %bb.0:
; CHECK-THUMBv7-NEXT:    ldrh r0, [r0]
; CHECK-THUMBv7-NEXT:    rev16 r0, r0
; CHECK-THUMBv7-NEXT:    bx lr

  %tmp1 = getelementptr inbounds i8, ptr %arg, i32 1
  %tmp2 = load i8, ptr %tmp1, align 1
  %tmp3 = zext i8 %tmp2 to i32
  %tmp5 = load i8, ptr %arg, align 2
  %tmp6 = zext i8 %tmp5 to i32
  %tmp7 = shl nuw nsw i32 %tmp6, 8
  %tmp8 = or i32 %tmp7, %tmp3
  ret i32 %tmp8
}

; ptr p; // p is 2 byte aligned
; ((i32) p[1] << 8) | ((i32) p[0] << 16)
define i32 @zext_load_i32_by_i8_bswap_shl_8(ptr %arg) {
; CHECK-LABEL: zext_load_i32_by_i8_bswap_shl_8:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    ldrb r1, [r0]
; CHECK-NEXT:    ldrb r0, [r0, #1]
; CHECK-NEXT:    lsl r1, r1, #16
; CHECK-NEXT:    orr r0, r1, r0, lsl #8
; CHECK-NEXT:    mov pc, lr
;
; CHECK-ARMv6-LABEL: zext_load_i32_by_i8_bswap_shl_8:
; CHECK-ARMv6:       @ %bb.0:
; CHECK-ARMv6-NEXT:    ldrb r1, [r0]
; CHECK-ARMv6-NEXT:    ldrb r0, [r0, #1]
; CHECK-ARMv6-NEXT:    lsl r1, r1, #16
; CHECK-ARMv6-NEXT:    orr r0, r1, r0, lsl #8
; CHECK-ARMv6-NEXT:    bx lr
;
; CHECK-THUMBv6-LABEL: zext_load_i32_by_i8_bswap_shl_8:
; CHECK-THUMBv6:       @ %bb.0:
; CHECK-THUMBv6-NEXT:    ldrb r1, [r0, #1]
; CHECK-THUMBv6-NEXT:    lsls r1, r1, #8
; CHECK-THUMBv6-NEXT:    ldrb r0, [r0]
; CHECK-THUMBv6-NEXT:    lsls r0, r0, #16
; CHECK-THUMBv6-NEXT:    adds r0, r0, r1
; CHECK-THUMBv6-NEXT:    bx lr
;
; CHECK-THUMBv7-LABEL: zext_load_i32_by_i8_bswap_shl_8:
; CHECK-THUMBv7:       @ %bb.0:
; CHECK-THUMBv7-NEXT:    ldrb r1, [r0]
; CHECK-THUMBv7-NEXT:    ldrb r0, [r0, #1]
; CHECK-THUMBv7-NEXT:    lsls r1, r1, #16
; CHECK-THUMBv7-NEXT:    orr.w r0, r1, r0, lsl #8
; CHECK-THUMBv7-NEXT:    bx lr

  %tmp1 = getelementptr inbounds i8, ptr %arg, i32 1
  %tmp2 = load i8, ptr %tmp1, align 1
  %tmp3 = zext i8 %tmp2 to i32
  %tmp30 = shl nuw nsw i32 %tmp3, 8
  %tmp5 = load i8, ptr %arg, align 2
  %tmp6 = zext i8 %tmp5 to i32
  %tmp7 = shl nuw nsw i32 %tmp6, 16
  %tmp8 = or i32 %tmp7, %tmp30
  ret i32 %tmp8
}

; ptr p; // p is 2 byte aligned
; ((i32) p[1] << 16) | ((i32) p[0] << 24)
define i32 @zext_load_i32_by_i8_bswap_shl_16(ptr %arg) {
; CHECK-LABEL: zext_load_i32_by_i8_bswap_shl_16:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    ldrb r1, [r0]
; CHECK-NEXT:    ldrb r0, [r0, #1]
; CHECK-NEXT:    lsl r1, r1, #24
; CHECK-NEXT:    orr r0, r1, r0, lsl #16
; CHECK-NEXT:    mov pc, lr
;
; CHECK-ARMv6-LABEL: zext_load_i32_by_i8_bswap_shl_16:
; CHECK-ARMv6:       @ %bb.0:
; CHECK-ARMv6-NEXT:    ldrb r1, [r0]
; CHECK-ARMv6-NEXT:    ldrb r0, [r0, #1]
; CHECK-ARMv6-NEXT:    lsl r1, r1, #24
; CHECK-ARMv6-NEXT:    orr r0, r1, r0, lsl #16
; CHECK-ARMv6-NEXT:    bx lr
;
; CHECK-THUMBv6-LABEL: zext_load_i32_by_i8_bswap_shl_16:
; CHECK-THUMBv6:       @ %bb.0:
; CHECK-THUMBv6-NEXT:    ldrb r1, [r0, #1]
; CHECK-THUMBv6-NEXT:    lsls r1, r1, #16
; CHECK-THUMBv6-NEXT:    ldrb r0, [r0]
; CHECK-THUMBv6-NEXT:    lsls r0, r0, #24
; CHECK-THUMBv6-NEXT:    adds r0, r0, r1
; CHECK-THUMBv6-NEXT:    bx lr
;
; CHECK-THUMBv7-LABEL: zext_load_i32_by_i8_bswap_shl_16:
; CHECK-THUMBv7:       @ %bb.0:
; CHECK-THUMBv7-NEXT:    ldrb r1, [r0]
; CHECK-THUMBv7-NEXT:    ldrb r0, [r0, #1]
; CHECK-THUMBv7-NEXT:    lsls r1, r1, #24
; CHECK-THUMBv7-NEXT:    orr.w r0, r1, r0, lsl #16
; CHECK-THUMBv7-NEXT:    bx lr

  %tmp1 = getelementptr inbounds i8, ptr %arg, i32 1
  %tmp2 = load i8, ptr %tmp1, align 1
  %tmp3 = zext i8 %tmp2 to i32
  %tmp30 = shl nuw nsw i32 %tmp3, 16
  %tmp5 = load i8, ptr %arg, align 2
  %tmp6 = zext i8 %tmp5 to i32
  %tmp7 = shl nuw nsw i32 %tmp6, 24
  %tmp8 = or i32 %tmp7, %tmp30
  ret i32 %tmp8
}