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

RUN: llvm-mc -filetype=obj -triple=x86_64-windows chain-bad.s -o chain-bad.obj
RUN: llvm-mc -filetype=obj -triple=x86_64-windows chain-bad2.s -o chain-bad2.obj
RUN: llvm-mc -filetype=obj -triple=x86_64-windows globals-bad.s -o globals-bad.obj
RUN: llvm-mc -filetype=obj -triple=x86_64-windows chain-good.s -o chain-good.obj
RUN: llvm-mc -filetype=obj -triple=x86_64-windows chain-good2.s -o chain-good2.obj
RUN: llvm-mc -filetype=obj -triple=x86_64-windows globals-good.s -o globals-good.obj

Temporary anti-dependency chains are allowed as long as they are broken by non-alias symbols.

RUN: lld-link -machine:amd64 -dll -noentry -out:test.dll chain-good.obj globals-good.obj
RUN: lld-link -machine:amd64 -dll -noentry -out:test.dll chain-good2.obj globals-good.obj

Chaining of anti-dependency symbols is not allowed.

RUN: not lld-link -machine:amd64 -dll -noentry -out:test.dll chain-bad.obj globals-bad.obj 2>&1 \
RUN:              | FileCheck -check-prefix=ANTIDEP %s
RUN: not lld-link -machine:amd64 -dll -noentry -out:test.dll chain-bad2.obj globals-bad.obj 2>&1 \
RUN:              | FileCheck -check-prefix=ANTIDEP %s

ANTIDEP:      lld-link: error: undefined symbol: sym
ANTIDEP-NEXT: >>> referenced by chain-bad

#--- chain-bad.s
    .weak_anti_dep sym
.set sym,sym2
    .weak_anti_dep sym2
.set sym2,sym3

#--- chain-bad2.s
    .weak_anti_dep sym2
.set sym2,sym3
    .weak sym
.set sym,sym2

#--- globals-bad.s
    .section .test,"r"
    .global sym3
.set sym3,3

#--- chain-good.s
    .weak_anti_dep sym
.set sym,sym2
    .weak_anti_dep sym2
.set sym2,sym3
    .weak_anti_dep sym3
.set sym3,sym4
    .weak_anti_dep sym4

#--- chain-good2.s
    .weak_anti_dep sym
.set sym,sym2
    .weak_anti_dep sym2
.set sym2,sym3
    .weak_anti_dep sym3
.set sym3,weak_sym
    .weak weak_sym
.set weak_sym,sym4
    .weak_anti_dep sym4

#--- globals-good.s
    .section .test,"r"
    .global sym2
.set sym2,2
    .global sym4
.set sym4,4