mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-16 11:30:51 +00:00
6ff20f205b
If an otherwise weak var is actually defined in this unit, it can't be undefined at runtime so we can use normal global variable sequences (ADRP/ADD) to access it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176259 91177308-0d34-0410-b5e6-96231b3b80d8
35 lines
879 B
LLVM
35 lines
879 B
LLVM
; RUN: llc -mtriple=aarch64-none-linux-gnu -o - < %s | FileCheck %s
|
|
|
|
declare extern_weak i32 @var()
|
|
|
|
define i32()* @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 litpool entry.
|
|
ret i32()* @var
|
|
; CHECK: .LCPI0_0:
|
|
; CHECK-NEXT: .xword var
|
|
|
|
; CHECK: ldr x0, [{{x[0-9]+}}, #:lo12:.LCPI0_0]
|
|
|
|
}
|
|
|
|
|
|
@arr_var = extern_weak global [10 x i32]
|
|
|
|
define i32* @bar() {
|
|
%addr = getelementptr [10 x i32]* @arr_var, i32 0, i32 5
|
|
; CHECK: .LCPI1_0:
|
|
; CHECK-NEXT: .xword arr_var
|
|
|
|
; CHECK: ldr [[BASE:x[0-9]+]], [{{x[0-9]+}}, #:lo12:.LCPI1_0]
|
|
; CHECK: add x0, [[BASE]], #20
|
|
ret i32* %addr
|
|
}
|
|
|
|
@defined_weak_var = internal unnamed_addr global i32 0
|
|
|
|
define i32* @wibble() {
|
|
ret i32* @defined_weak_var
|
|
; CHECK: adrp [[BASE:x[0-9]+]], defined_weak_var
|
|
; CHECK: add x0, [[BASE]], #:lo12:defined_weak_var
|
|
} |