xref: /aosp_15_r20/external/llvm/test/CodeGen/AArch64/arm64-elf-globals.ll (revision 9880d6810fe72a1726cb53787c6711e909410d58)

; RUN: llc -mtriple=arm64-linux-gnu -o - %s -mcpu=cyclone | FileCheck %s
; RUN: llc -mtriple=arm64-linux-gnu -o - %s -O0 -mcpu=cyclone | FileCheck %s --check-prefix=CHECK-FAST
; RUN: llc -mtriple=arm64-linux-gnu -relocation-model=pic -o - %s -mcpu=cyclone | FileCheck %s --check-prefix=CHECK-PIC
; RUN: llc -mtriple=arm64-linux-gnu -O0 -relocation-model=pic -o - %s -mcpu=cyclone | FileCheck %s --check-prefix=CHECK-FAST-PIC

@var8 = external global i8, align 1
@var16 = external global i16, align 2
@var32 = external global i32, align 4
@var64 = external global i64, align 8

define i8 @test_i8(i8 %new) {
  %val = load i8, i8* @var8, align 1
  store i8 %new, i8* @var8
  ret i8 %val
; CHECK-LABEL: test_i8:
; CHECK: adrp x[[HIREG:[0-9]+]], var8
; CHECK: ldrb {{w[0-9]+}}, [x[[HIREG]], :lo12:var8]
; CHECK: strb {{w[0-9]+}}, [x[[HIREG]], :lo12:var8]

; CHECK-PIC-LABEL: test_i8:
; CHECK-PIC: adrp x[[HIREG:[0-9]+]], :got:var8
; CHECK-PIC: ldr x[[VAR_ADDR:[0-9]+]], [x[[HIREG]], :got_lo12:var8]
; CHECK-PIC: ldrb {{w[0-9]+}}, [x[[VAR_ADDR]]]

; CHECK-FAST: adrp x[[HIREG:[0-9]+]], var8
; CHECK-FAST: ldrb {{w[0-9]+}}, [x[[HIREG]], :lo12:var8]

; CHECK-FAST-PIC: adrp x[[HIREG:[0-9]+]], :got:var8
; CHECK-FAST-PIC: ldr x[[VARADDR:[0-9]+]], [x[[HIREG]], :got_lo12:var8]
; CHECK-FAST-PIC: ldr {{w[0-9]+}}, [x[[VARADDR]]]
}

define i16 @test_i16(i16 %new) {
  %val = load i16, i16* @var16, align 2
  store i16 %new, i16* @var16
  ret i16 %val
; CHECK-LABEL: test_i16:
; CHECK: adrp x[[HIREG:[0-9]+]], var16
; CHECK: ldrh {{w[0-9]+}}, [x[[HIREG]], :lo12:var16]
; CHECK: strh {{w[0-9]+}}, [x[[HIREG]], :lo12:var16]

; CHECK-FAST: adrp x[[HIREG:[0-9]+]], var16
; CHECK-FAST: ldrh {{w[0-9]+}}, [x[[HIREG]], :lo12:var16]
}

define i32 @test_i32(i32 %new) {
  %val = load i32, i32* @var32, align 4
  store i32 %new, i32* @var32
  ret i32 %val
; CHECK-LABEL: test_i32:
; CHECK: adrp x[[HIREG:[0-9]+]], var32
; CHECK: ldr {{w[0-9]+}}, [x[[HIREG]], :lo12:var32]
; CHECK: str {{w[0-9]+}}, [x[[HIREG]], :lo12:var32]

; CHECK-FAST: adrp x[[HIREG:[0-9]+]], var32
; CHECK-FAST: add {{x[0-9]+}}, x[[HIREG]], :lo12:var32
}

define i64 @test_i64(i64 %new) {
  %val = load i64, i64* @var64, align 8
  store i64 %new, i64* @var64
  ret i64 %val
; CHECK-LABEL: test_i64:
; CHECK: adrp x[[HIREG:[0-9]+]], var64
; CHECK: ldr {{x[0-9]+}}, [x[[HIREG]], :lo12:var64]
; CHECK: str {{x[0-9]+}}, [x[[HIREG]], :lo12:var64]

; CHECK-FAST: adrp x[[HIREG:[0-9]+]], var64
; CHECK-FAST: add {{x[0-9]+}}, x[[HIREG]], :lo12:var64
}

define i64* @test_addr() {
  ret i64* @var64
; CHECK-LABEL: test_addr:
; CHECK: adrp [[HIREG:x[0-9]+]], var64
; CHECK: add x0, [[HIREG]], :lo12:var64

; CHECK-FAST: adrp [[HIREG:x[0-9]+]], var64
; CHECK-FAST: add x0, [[HIREG]], :lo12:var64
}

@hiddenvar = hidden global i32 0, align 4
@protectedvar = protected global i32 0, align 4

define i32 @test_vis() {
  %lhs = load i32, i32* @hiddenvar, align 4
  %rhs = load i32, i32* @protectedvar, align 4
  %ret = add i32 %lhs, %rhs
  ret i32 %ret
; CHECK-PIC: adrp {{x[0-9]+}}, hiddenvar
; CHECK-PIC: ldr {{w[0-9]+}}, [{{x[0-9]+}}, :lo12:hiddenvar]
; CHECK-PIC: adrp {{x[0-9]+}}, protectedvar
; CHECK-PIC: ldr {{w[0-9]+}}, [{{x[0-9]+}}, :lo12:protectedvar]
}

@var_default = external global [2 x i32]

define i32 @test_default_align() {
  %addr = getelementptr [2 x i32], [2 x i32]* @var_default, i32 0, i32 0
  %val = load i32, i32* %addr
  ret i32 %val
; CHECK-LABEL: test_default_align:
; CHECK: adrp x[[HIREG:[0-9]+]], var_default
; CHECK: ldr w0, [x[[HIREG]], :lo12:var_default]
}

define i64 @test_default_unaligned() {
  %addr = bitcast [2 x i32]* @var_default to i64*
  %val = load i64, i64* %addr
  ret i64 %val
; CHECK-LABEL: test_default_unaligned:
; CHECK: adrp [[HIREG:x[0-9]+]], var_default
; CHECK: add x[[ADDR:[0-9]+]], [[HIREG]], :lo12:var_default
; CHECK: ldr x0, [x[[ADDR]]]
}