| ; RUN: llc -mtriple=aarch64-none-linux-gnu -relocation-model=pic -o - %s | FileCheck %s |
| ; RUN: llc -mtriple=aarch64-none-linux-gnu -relocation-model=static -o - < %s | FileCheck %s |
| ; RUN: llc -mtriple=aarch64-none-linux-gnu -code-model=large -o - %s | FileCheck --check-prefix=CHECK-LARGE %s |
| ; RUN: llc -mtriple=aarch64-none-elf -code-model=tiny -o - %s | FileCheck --check-prefix=CHECK-TINY %s |
| |
| declare extern_weak dso_local i32 @var() |
| |
| define ptr @foo() { |
| ; The usual ADRP/ADD pair can't be used for a weak reference because it must |
| ; evaluate to 0 if the symbol is undefined. We use a GOT entry for PIC |
| ; otherwise a litpool entry. |
| ret ptr @var |
| |
| |
| ; CHECK: adrp x[[ADDRHI:[0-9]+]], :got:var |
| ; CHECK: ldr x0, [x[[ADDRHI]], :got_lo12:var] |
| |
| ; In the large model, the usual relocations are absolute and can |
| ; materialise 0. |
| ; CHECK-LARGE: movz x0, #:abs_g0_nc:var |
| ; CHECK-LARGE: movk x0, #:abs_g1_nc:var |
| ; CHECK-LARGE: movk x0, #:abs_g2_nc:var |
| ; CHECK-LARGE: movk x0, #:abs_g3:var |
| |
| ; In the tiny codemodel we us a got relocated LDR. |
| ; CHECK-TINY: ldr x0, :got:var |
| } |
| |
| |
| @arr_var = extern_weak global [10 x i32] |
| |
| define ptr @bar() { |
| %addr = getelementptr [10 x i32], ptr @arr_var, i32 0, i32 5 |
| |
| |
| ; CHECK: adrp x[[ADDRHI:[0-9]+]], :got:arr_var |
| ; CHECK: ldr [[BASE:x[0-9]+]], [x[[ADDRHI]], :got_lo12:arr_var] |
| ; CHECK: add x0, [[BASE]], #20 |
| |
| ret ptr %addr |
| |
| ; Note, In the large model, if dso_local, the relocations are absolute and can materialise 0. |
| ; CHECK-LARGE: adrp x[[ADDR:[0-9]+]], :got:arr_var |
| ; CHECK-LARGE-NEXT: ldr x[[ADDR]], [x[[ADDR]], :got_lo12:arr_var] |
| ; CHECK-LARGE-NEXT: add x0, x[[ADDR]], #20 |
| |
| ; CHECK-TINY: ldr [[BASE:x[0-9]+]], :got:arr_var |
| ; CHECK-TINY: add x0, [[BASE]], #20 |
| } |
| |
| @defined_weak_var = internal unnamed_addr global i32 0 |
| |
| define ptr @wibble() { |
| ret ptr @defined_weak_var |
| |
| ; CHECK: adrp [[BASE:x[0-9]+]], defined_weak_var |
| ; CHECK: add x0, [[BASE]], :lo12:defined_weak_var |
| |
| ; CHECK-LARGE: movz x0, #:abs_g0_nc:defined_weak_var |
| ; CHECK-LARGE: movk x0, #:abs_g1_nc:defined_weak_var |
| ; CHECK-LARGE: movk x0, #:abs_g2_nc:defined_weak_var |
| ; CHECK-LARGE: movk x0, #:abs_g3:defined_weak_var |
| |
| ; CHECK-TINY: adr x0, defined_weak_var |
| } |