llvm-6502/test/CodeGen/AArch64/extern-weak.ll

; 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]

}
Implement external weak (ELF) symbols on AArch64 Weakly defined symbols should evaluate to 0 if they're undefined at link-time. This is impossible to do with the usual address generation patterns, so we should use a literal pool entry to materlialise the address. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174518 91177308-0d34-0410-b5e6-96231b3b80d8 2013-02-06 16:43:33 +00:00			`; 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`
AArch64: remove ConstantIsland pass & put literals in separate section. This implements the review suggestion to simplify the AArch64 backend. If we later discover that we really need the extra complexity of the ConstantIslands pass for performance reasons it can be resurrected. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175258 91177308-0d34-0410-b5e6-96231b3b80d8 2013-02-15 09:33:43 +00:00
			`; CHECK: ldr x0, [{{x[0-9]+}}, #:lo12:.LCPI0_0]`

Implement external weak (ELF) symbols on AArch64 Weakly defined symbols should evaluate to 0 if they're undefined at link-time. This is impossible to do with the usual address generation patterns, so we should use a literal pool entry to materlialise the address. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174518 91177308-0d34-0410-b5e6-96231b3b80d8 2013-02-06 16:43:33 +00:00			`}`