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-none-eabi -code-model=tiny -o - %s | FileCheck --check-prefix=CHECK-TINY %s 5 6declare extern_weak dso_local i32 @var() 7 8define i32()* @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 i32()* @var 13 14 15; CHECK: adrp x[[ADDRHI:[0-9]+]], :got:var 16; CHECK: ldr x0, [x[[ADDRHI]], :got_lo12:var] 17 18 ; In the large model, the usual relocations are absolute and can 19 ; materialise 0. 20; CHECK-LARGE: movz x0, #:abs_g0_nc:var 21; CHECK-LARGE: movk x0, #:abs_g1_nc:var 22; CHECK-LARGE: movk x0, #:abs_g2_nc:var 23; CHECK-LARGE: movk x0, #:abs_g3:var 24 25 ; In the tiny codemodel we us a got relocated LDR. 26; CHECK-TINY: ldr x0, :got: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 35 36; CHECK: adrp x[[ADDRHI:[0-9]+]], :got:arr_var 37; CHECK: ldr [[BASE:x[0-9]+]], [x[[ADDRHI]], :got_lo12:arr_var] 38; CHECK: add x0, [[BASE]], #20 39 40 ret i32* %addr 41 42 ; Note, In the large model, if dso_local, the relocations are absolute and can materialise 0. 43; CHECK-LARGE: adrp x[[ADDR:[0-9]+]], :got:arr_var 44; CHECK-LARGE-NEXT: ldr x[[ADDR]], [x[[ADDR]], :got_lo12:arr_var] 45; CHECK-LARGE-NEXT: add x0, x[[ADDR]], #20 46 47; CHECK-TINY: ldr [[BASE:x[0-9]+]], :got:arr_var 48; CHECK-TINY: add x0, [[BASE]], #20 49} 50 51@defined_weak_var = internal unnamed_addr global i32 0 52 53define i32* @wibble() { 54 ret i32* @defined_weak_var 55 56; CHECK: adrp [[BASE:x[0-9]+]], defined_weak_var 57; CHECK: add x0, [[BASE]], :lo12:defined_weak_var 58 59; CHECK-LARGE: movz x0, #:abs_g0_nc:defined_weak_var 60; CHECK-LARGE: movk x0, #:abs_g1_nc:defined_weak_var 61; CHECK-LARGE: movk x0, #:abs_g2_nc:defined_weak_var 62; CHECK-LARGE: movk x0, #:abs_g3:defined_weak_var 63 64; CHECK-TINY: adr x0, defined_weak_var 65} 66