llvm/test/CodeGen/ARM/execute-only.ll

; RUN: llc -mtriple=thumbv8m.base-eabi -mattr=+execute-only %s -o - | FileCheck --check-prefix=CHECK --check-prefix=CHECK-T2BASE %s
; RUN: llc -mtriple=thumbv8m.base-eabi -mcpu=cortex-m23 -mattr=+execute-only %s -o - | FileCheck --check-prefix=CHECK --check-prefix=CHECK-T2BASE %s
; RUN: llc -mtriple=thumbv7m-eabi      -mattr=+execute-only %s -o - | FileCheck --check-prefix=CHECK --check-prefix=CHECK-T2 %s
; RUN: llc -mtriple=thumbv8m.main-eabi -mattr=+execute-only %s -o - | FileCheck --check-prefix=CHECK --check-prefix=CHECK-T2 %s
; RUN: llc -mtriple=thumbv6m-eabi -mattr=+execute-only %s -o - | FileCheck --check-prefix=CHECK-T1 %s

; CHECK-NOT: {{^ *}}.text{{$}}
; CHECK: .section .text,"axy",%progbits,unique,0

@var = global i32 0

define i32 @global() minsize {
; CHECK-LABEL: global:
; CHECK: movw [[GLOBDEST:r[0-9]+]], :lower16:var
; CHECK-NEXT: movt [[GLOBDEST]], :upper16:var
; CHECK-T1-LABEL: global:
; CHECK-T1: movs [[GLOBDEST:r[0-9]+]], :upper8_15:var
; CHECK-T1-NEXT: lsls [[GLOBDEST]], [[GLOBDEST]], #8
; CHECK-T1-NEXT: adds [[GLOBDEST]], :upper0_7:var
; CHECK-T1-NEXT: lsls [[GLOBDEST]], [[GLOBDEST]], #8
; CHECK-T1-NEXT: adds [[GLOBDEST]], :lower8_15:var
; CHECK-T1-NEXT: lsls [[GLOBDEST]], [[GLOBDEST]], #8
; CHECK-T1-NEXT: adds [[GLOBDEST]], :lower0_7:var

  %val = load i32, ptr @var
  ret i32 %val
}

define i32 @jump_table(i32 %c, i32 %a, i32 %b) #0 {
; CHECK-LABEL: jump_table:
; CHECK-T2: adr.w   [[REG_JT:r[0-9]+]], .LJTI1_0
; CHECK-T2: add.w   [[REG_ENTRY:r[0-9]+]], [[REG_JT]], {{r[0-9]+}}, lsl #2
; CHECK-T2: mov     pc, [[REG_ENTRY]]

; CHECK-T2BASE: lsls    [[REG_OFFSET:r[0-9]+]], {{r[0-9]+}}, #2
; CHECK-T2BASE: adr     [[REG_JT:r[0-9]+]], .LJTI1_0
; CHECK-T2BASE: adds    [[REG_ENTRY:r[0-9]+]], [[REG_JT]], [[REG_OFFSET]]
; CHECK-T2BASE: mov     pc, [[REG_ENTRY]]

; CHECK-LABEL: .LJTI1_0:
; CHECK-NEXT: b.w
; CHECK-NEXT: b.w
; CHECK-NEXT: b.w
; CHECK-NEXT: b.w
; CHECK-NEXT: b.w
; CHECK-NEXT: b.w

; CHECK-T1-LABEL: jump_table:
; CHECK-T1:      lsls [[REG_OFFSET:r[0-9]+]], {{r[0-9]+}}, #2
; CHECK-T1-NEXT: movs [[REG_JT:r[0-9]+]], :upper8_15:.LJTI1_0
; CHECK-T1-NEXT: lsls [[REG_JT]], [[REG_JT]], #8
; CHECK-T1-NEXT: adds [[REG_JT]], :upper0_7:.LJTI1_0
; CHECK-T1-NEXT: lsls [[REG_JT]], [[REG_JT]], #8
; CHECK-T1-NEXT: adds [[REG_JT]], :lower8_15:.LJTI1_0
; CHECK-T1-NEXT: lsls [[REG_JT]], [[REG_JT]], #8
; CHECK-T1-NEXT: adds [[REG_JT]], :lower0_7:.LJTI1_0
; CHECK-T1-NEXT: ldr  [[REG_ENTRY:r[0-9]+]], [[[REG_JT]], [[REG_OFFSET]]]
; CHECK-T1-NEXT: mov  pc, [[REG_ENTRY]]
; CHECK-T1:      .section .rodata,"a",%progbits
; CHECK-T1-NEXT: .p2align 2, 0x0
; CHECK-T1-NEXT: .type	.LJTI1_0,%object
; CHECK-T1-NEXT: .LJTI1_0:
; CHECK-T1-NEXT: .long
; CHECK-T1-NEXT: .long
; CHECK-T1-NEXT: .long
; CHECK-T1-NEXT: .long
; CHECK-T1-NEXT: .long
; CHECK-T1-NEXT: .long

entry:
  switch i32 %c, label %return [
    i32 1, label %sw.bb
    i32 2, label %sw.bb1
    i32 3, label %sw.bb3
    i32 4, label %sw.bb4
    i32 5, label %sw.bb6
    i32 6, label %sw.bb8
  ]

sw.bb:                                            ; preds = %entry
  %add = add nsw i32 %a, 6
  br label %return

sw.bb1:                                           ; preds = %entry
  %add2 = add nsw i32 %a, 4
  br label %return

sw.bb3:                                           ; preds = %entry
  %sub = add nsw i32 %a, -3
  br label %return

sw.bb4:                                           ; preds = %entry
  %add5 = add nsw i32 %b, 5
  br label %return

sw.bb6:                                           ; preds = %entry
  %add7 = add nsw i32 %a, 1
  br label %return

sw.bb8:                                           ; preds = %entry
  %add9 = add nsw i32 %a, 2
  br label %return

return:                                           ; preds = %entry, %sw.bb8, %sw.bb6, %sw.bb4, %sw.bb3, %sw.bb1, %sw.bb
  %retval.0 = phi i32 [ %add9, %sw.bb8 ], [ %add7, %sw.bb6 ], [ %add5, %sw.bb4 ], [ %sub, %sw.bb3 ], [ %add2, %sw.bb1 ], [ %add, %sw.bb ], [ 0, %entry ]
  ret i32 %retval.0
}

@.str = private unnamed_addr constant [4 x i8] c"FOO\00", align 1

define hidden ptr @string_literal() {
entry:
; CHECK-LABEL: string_literal:
; CHECK: movw [[STRLIT:r[0-9]+]], :lower16:.L.str
; CHECK-NEXT: movt [[STRLIT]], :upper16:.L.str
; CHECK-T1-LABEL: string_literal:
; CHECK-T1: movs [[STRLIT:r[0-9]+]], :upper8_15:.L.str
; CHECK-T1-NEXT: lsls [[STRLIT]], [[STRLIT]], #8
; CHECK-T1-NEXT: adds [[STRLIT]], :upper0_7:.L.str
; CHECK-T1-NEXT: lsls [[STRLIT]], [[STRLIT]], #8
; CHECK-T1-NEXT: adds [[STRLIT]], :lower8_15:.L.str
; CHECK-T1-NEXT: lsls [[STRLIT]], [[STRLIT]], #8
; CHECK-T1-NEXT: adds [[STRLIT]], :lower0_7:.L.str

    ret ptr @.str
}

@external_global = external global i32
define i32 @test_external_global() {
entry:
; CHECK-LABEL: external_global:
; CHECK: movw [[EXTGLOB:r[0-9]+]], :lower16:external_global
; CHECK-NEXT: movt [[EXTGLOB]], :upper16:external_global
; CHECK-T1-LABEL: external_global:
; CHECK-T1: movs [[EXTGLOB:r[0-9]+]], :upper8_15:external_global
; CHECK-T1-NEXT: lsls [[EXTGLOB]], [[EXTGLOB]], #8
; CHECK-T1-NEXT: adds [[EXTGLOB]], :upper0_7:external_global
; CHECK-T1-NEXT: lsls [[EXTGLOB]], [[EXTGLOB]], #8
; CHECK-T1-NEXT: adds [[EXTGLOB]], :lower8_15:external_global
; CHECK-T1-NEXT: lsls [[EXTGLOB]], [[EXTGLOB]], #8
; CHECK-T1-NEXT: adds [[EXTGLOB]], :lower0_7:external_global

  %v = load i32, ptr @external_global
  ret i32 %v
}

define i32 @test_imm() {
entry:
; CHECK-LABEL: test_imm:
; CHECK: movw [[IMMDEST:r[0-9]+]], #13124
; CHECK-NEXT: movt [[IMMDEST]], #4386
; CHECK-NEXT: bx lr
; CHECK-T1-LABEL: test_imm:
; CHECK-T1: movs [[IMMDEST:r[0-9]+]], #17
; CHECK-T1-NEXT: lsls [[IMMDEST]], [[IMMDEST]], #8
; CHECK-T1-NEXT: adds [[IMMDEST]], #34
; CHECK-T1-NEXT: lsls [[IMMDEST]], [[IMMDEST]], #8
; CHECK-T1-NEXT: adds [[IMMDEST]], #51
; CHECK-T1-NEXT: lsls [[IMMDEST]], [[IMMDEST]], #8
; CHECK-T1-NEXT: adds [[IMMDEST]], #68
; CHECK-T1-NEXT: bx lr

  ret i32 u0x11223344
}

define i32 @test_imm_high_half() {
entry:
; CHECK-LABEL: test_imm_high_half:
; CHECK-T2BASE: movw [[IMMDEST:r[0-9]+]], #0
; CHECK-T2: movs [[IMMDEST:r[0-9]+]], #0
; CHECK-NEXT: movt [[IMMDEST]], #4386
; CHECK-NEXT: bx lr
; CHECK-T1-LABEL: test_imm_high_half:
; CHECK-T1: movs [[IMMDEST:r[0-9]+]], #17
; CHECK-T1-NEXT: lsls [[IMMDEST]], [[IMMDEST]], #8
; CHECK-T1-NEXT: adds [[IMMDEST]], #34
; CHECK-T1-NEXT: lsls [[IMMDEST]], [[IMMDEST]], #16
; CHECK-T1-NEXT: bx lr

  ret i32 u0x11220000
}

define i32 @test_imm_low_half() {
; CHECK-LABEL: test_imm_low_half:
; CHECK: movw [[IMMDEST:r[0-9]+]], #13124
; CHECK-NEXT: bx lr
; CHECK-T1-LABEL: test_imm_low_half:
; CHECK-T1: movs [[IMMDEST]], #51
; CHECK-T1-NEXT: lsls [[IMMDEST]], [[IMMDEST]], #8
; CHECK-T1-NEXT: adds [[IMMDEST]], #68
; CHECK-T1-NEXT: bx lr

entry:
  ret i32 u0x3344
}

define i32 @test_imm_middle_bytes() {
; CHECK-LABEL: test_imm_middle_bytes:
; CHECK: movw [[IMMDEST:r[0-9]+]], #13056
; CHECK-NEXT: movt [[IMMDEST]], #34
; CHECK-NEXT: bx lr
; CHECK-T1-LABEL: test_imm_middle_bytes:
; CHECK-T1: movs [[IMMDEST]], #34
; CHECK-T1-NEXT: lsls [[IMMDEST]], [[IMMDEST]], #8
; CHECK-T1-NEXT: adds [[IMMDEST]], #51
; CHECK-T1-NEXT: lsls [[IMMDEST]], [[IMMDEST]], #8
; CHECK-T1-NEXT: bx lr

  ret i32 u0x223300
}

; This struct is sized so that the byval call does an inline memcpy of
; 0x10001 bytes.
%struct.struct_t = type { [65553 x i8] }
@byval_arg = global %struct.struct_t zeroinitializer
declare void @byval_fn(ptr byval(%struct.struct_t))

define void @test_byval_call() {
entry:
; CHECK-LABEL: test_byval_call:
; CHECK-T2BASE: movw [[BYVAL_CPYSIZE:r[0-9]+]], #1
; CHECK-T2: movs [[BYVAL_CPYSIZE:r[0-9]+]], #1
; CHECK: movt [[BYVAL_CPYSIZE]], #1
; CHECK-T1-LABEL: test_byval_call:
; CHECK-T1: movs [[BYVAL_CPYSIZE:r[0-9]+]], #1
; CHECK-T1: lsls [[BYVAL_CPYSIZE]], [[BYVAL_CPYSIZE]], #16
; CHECK-T1: adds [[BYVAL_CPYSIZE]], #1

  call void @byval_fn(ptr byval(%struct.struct_t) @byval_arg)
  ret void
}