llvm-project

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# REQUIRES: x86
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## Test creating a DLL and linking against the DLL without using an import
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## library.
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## Explicitly creating an import library but naming it differently than the
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## DLL, to avoid any risk of implicitly referencing it instead of the DLL
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## itself.
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## Linking the executable with -opt:noref, to make sure that we don't
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## pull in more import entries than what's needed, even if not running GC.
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# RUN: split-file %s %t.dir
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# RUN: llvm-mc -filetype=obj -triple=x86_64-windows-gnu %t.dir/lib.s -o %t.lib.o
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# RUN: lld-link -noentry -dll -def:%t.dir/lib.def %t.lib.o -out:%t.lib.dll -implib:%t.implib.lib
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# RUN: llvm-mc -filetype=obj -triple=x86_64-windows-gnu %t.dir/main.s -o %t.main.o
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# RUN: lld-link -lldmingw %t.main.o -out:%t.main.exe %t.lib.dll -opt:noref -verbose 2>&1 | FileCheck --check-prefix=LOG %s
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# RUN: llvm-readobj --coff-imports %t.main.exe | FileCheck %s
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#--- lib.s
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.text
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.global func1
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func1:
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  ret
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.global func2
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func2:
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  ret
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.global func3
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func3:
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  ret
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.data
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.global variable
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variable:
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  .int 42
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#--- lib.def
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EXPORTS
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func1
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func2
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func3
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variable
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#--- main.s
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.text
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.global mainCRTStartup
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mainCRTStartup:
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  call func2
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  movq .refptr.variable(%rip), %rax
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  movl (%rax), %eax
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  ret
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.section .rdata$.refptr.variable,"dr",discard,.refptr.variable
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.globl .refptr.variable
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.refptr.variable:
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  .quad variable
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# CHECK:      Import {
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# CHECK-NEXT:   Name: link-dll.s.tmp.lib.dll
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# CHECK-NEXT:   ImportLookupTableRVA:
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# CHECK-NEXT:   ImportAddressTableRVA
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# CHECK-NEXT:   Symbol: func2
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# CHECK-NEXT:   Symbol: variable
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# CHECK-NEXT: }
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# LOG: Automatically importing variable from link-dll.s.tmp.lib.dll
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