lld/test/COFF/weak-preference.test

REQUIRES: x86
RUN: split-file %s %t.dir && cd %t.dir

RUN: llvm-mc -filetype=obj -triple=x86_64-windows weak-ref.s -o weak-ref.obj
RUN: llvm-mc -filetype=obj -triple=x86_64-windows weak-def.s -o weak-def.obj

RUN: env LLD_IN_TEST=1 not lld-link -entry:entry -subsystem:console -out:test.exe weak-ref.obj weak-def.obj 2>&1 | FileCheck -check-prefix=ERR %s

ERR: error: duplicate symbol: weakfunc


Test that we get the same choice for weakfunc (pointing at the definition
in weak-def.s, not the absolute null fallback provided by weak-ref.s),
regardless of which object is linked first.

RUN: lld-link -lld-allow-duplicate-weak -entry:entry -subsystem:console -out:test.exe weak-def.obj weak-ref.obj
RUN: llvm-objdump -s test.exe | FileCheck %s
RUN: lld-link -lld-allow-duplicate-weak -entry:entry -subsystem:console -out:test.exe weak-ref.obj weak-def.obj
RUN: llvm-objdump -s test.exe | FileCheck %s

CHECK:      Contents of section .rdata:
CHECK-NEXT:  140002000 14100040 01000000

#--- weak-ref.s
	.text
	.globl	entry
entry:
	cmpq	$0, .refptr.weakfunc(%rip)
	je	.LBB0_1
	rex64 jmpq	*.refptr.weakfunc(%rip)
.LBB0_1:
	retq

	.section	.rdata$.refptr.weakfunc,"dr",discard,.refptr.weakfunc
	.globl	.refptr.weakfunc
.refptr.weakfunc:
	.quad	weakfunc

	.weak	weakfunc

#--- weak-def.s
	.section	.text$b,"xr"
	.balign	4
	.weak	weakfunc
weakfunc:
	retq