1; RUN: llc -mtriple=arm64-none-linux-gnu -relocation-model=pic -o - < %s | FileCheck %s 2; RUN: llc -mtriple=arm64-none-linux-gnu -relocation-model=static -o - < %s | FileCheck --check-prefix=CHECK-STATIC %s 3; RUN: llc -mtriple=arm64-none-linux-gnu -code-model=large -o - < %s | FileCheck --check-prefix=CHECK-LARGE %s 4 5declare extern_weak i32 @var() 6 7define i32()* @foo() { 8; The usual ADRP/ADD pair can't be used for a weak reference because it must 9; evaluate to 0 if the symbol is undefined. We use a GOT entry for PIC 10; otherwise a litpool entry. 11 ret i32()* @var 12 13; CHECK: adrp x[[VAR:[0-9]+]], :got:var 14; CHECK: ldr x0, [x[[VAR]], :got_lo12:var] 15 16; CHECK-STATIC: .LCPI0_0: 17; CHECK-STATIC-NEXT: .xword var 18; CHECK-STATIC: adrp x[[VAR:[0-9]+]], .LCPI0_0 19; CHECK-STATIC: ldr x0, [x[[VAR]], :lo12:.LCPI0_0] 20 21 ; In the large model, the usual relocations are absolute and can 22 ; materialise 0. 23; CHECK-LARGE: movz x0, #:abs_g3:var 24; CHECK-LARGE: movk x0, #:abs_g2_nc:var 25; CHECK-LARGE: movk x0, #:abs_g1_nc:var 26; CHECK-LARGE: movk x0, #:abs_g0_nc:var 27} 28 29 30@arr_var = extern_weak global [10 x i32] 31 32define i32* @bar() { 33 %addr = getelementptr [10 x i32], [10 x i32]* @arr_var, i32 0, i32 5 34; CHECK: adrp x[[ARR_VAR_HI:[0-9]+]], :got:arr_var 35; CHECK: ldr [[ARR_VAR:x[0-9]+]], [x[[ARR_VAR_HI]], :got_lo12:arr_var] 36; CHECK: add x0, [[ARR_VAR]], #20 37 ret i32* %addr 38 39; CHECK-STATIC: .LCPI1_0: 40; CHECK-STATIC-NEXT: .xword arr_var 41; CHECK-STATIC: ldr [[BASE:x[0-9]+]], [{{x[0-9]+}}, :lo12:.LCPI1_0] 42; CHECK-STATIC: add x0, [[BASE]], #20 43 44 ; In the large model, the usual relocations are absolute and can 45 ; materialise 0. 46; CHECK-LARGE: movz [[ARR_VAR:x[0-9]+]], #:abs_g3:arr_var 47; CHECK-LARGE: movk [[ARR_VAR]], #:abs_g2_nc:arr_var 48; CHECK-LARGE: movk [[ARR_VAR]], #:abs_g1_nc:arr_var 49; CHECK-LARGE: movk [[ARR_VAR]], #:abs_g0_nc:arr_var 50} 51 52@defined_weak_var = internal unnamed_addr global i32 0 53 54define i32* @wibble() { 55 ret i32* @defined_weak_var 56; CHECK: adrp [[BASE:x[0-9]+]], defined_weak_var 57; CHECK: add x0, [[BASE]], :lo12:defined_weak_var 58 59; CHECK-STATIC: adrp [[BASE:x[0-9]+]], defined_weak_var 60; CHECK-STATIC: add x0, [[BASE]], :lo12:defined_weak_var 61 62; CHECK-LARGE: movz x0, #:abs_g3:defined_weak_var 63; CHECK-LARGE: movk x0, #:abs_g2_nc:defined_weak_var 64; CHECK-LARGE: movk x0, #:abs_g1_nc:defined_weak_var 65; CHECK-LARGE: movk x0, #:abs_g0_nc:defined_weak_var 66} 67