1; RUN: llc -mtriple=aarch64-none-linux-gnu -relocation-model=pic -o - %s | FileCheck %s 2; RUN: llc -mtriple=aarch64-none-linux-gnu -relocation-model=static -o - < %s | FileCheck %s 3; RUN: llc -mtriple=aarch64-none-linux-gnu -code-model=large -o - %s | FileCheck --check-prefix=CHECK-LARGE %s 4; RUN: llc -mtriple=aarch64-none-elf -code-model=tiny -o - %s | FileCheck --check-prefix=CHECK-TINY %s 5 6declare extern_weak dso_local i32 @var() 7 8define ptr @foo() { 9; The usual ADRP/ADD pair can't be used for a weak reference because it must 10; evaluate to 0 if the symbol is undefined. We use a GOT entry for PIC 11; otherwise a litpool entry. 12 ret ptr @var 13 14; CHECK: adrp x[[ADDRHI:[0-9]+]], :got:var 15; CHECK-NEXT: ldr x0, [x[[ADDRHI]], :got_lo12:var] 16 17 ; In the large model, the usual relocations are absolute and can 18 ; materialise 0. 19; CHECK-LARGE: movz x0, #:abs_g0_nc:var 20; CHECK-LARGE-NEXT: movk x0, #:abs_g1_nc:var 21; CHECK-LARGE-NEXT: movk x0, #:abs_g2_nc:var 22; CHECK-LARGE-NEXT: movk x0, #:abs_g3:var 23 24 ; In the tiny codemodel we us a got relocated LDR. 25; CHECK-TINY: ldr x0, :got:var 26} 27 28 29@arr_var = extern_weak global [10 x i32] 30 31define ptr @bar() { 32 %addr = getelementptr [10 x i32], ptr @arr_var, i32 0, i32 5 33 34; CHECK: adrp x[[ADDRHI:[0-9]+]], :got:arr_var 35; CHECK-NEXT: ldr [[BASE:x[0-9]+]], [x[[ADDRHI]], :got_lo12:arr_var] 36; CHECK-NEXT: add x0, [[BASE]], #20 37 38 ret ptr %addr 39 40 ; Note, In the large model, if dso_local, the relocations are absolute and can materialise 0. 41; CHECK-LARGE: adrp x[[ADDR:[0-9]+]], :got:arr_var 42; CHECK-LARGE-NEXT: ldr x[[ADDR]], [x[[ADDR]], :got_lo12:arr_var] 43; CHECK-LARGE-NEXT: add x0, x[[ADDR]], #20 44 45; CHECK-TINY: ldr [[BASE:x[0-9]+]], :got:arr_var 46; CHECK-TINY-NEXT: add x0, [[BASE]], #20 47} 48 49@defined_weak_var = internal unnamed_addr global i32 0 50 51define ptr @wibble() { 52 ret ptr @defined_weak_var 53 54; CHECK: adrp [[BASE:x[0-9]+]], defined_weak_var 55; CHECK-NEXT: add x0, [[BASE]], :lo12:defined_weak_var 56 57; CHECK-LARGE: movz x0, #:abs_g0_nc:defined_weak_var 58; CHECK-LARGE-NEXT: movk x0, #:abs_g1_nc:defined_weak_var 59; CHECK-LARGE-NEXT: movk x0, #:abs_g2_nc:defined_weak_var 60; CHECK-LARGE-NEXT: movk x0, #:abs_g3:defined_weak_var 61 62; CHECK-TINY: adr x0, defined_weak_var 63} 64