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COFF: Implement DLL symbol exports for bitcode files. 

Differential Revision: http://reviews.llvm.org/D10530

llvm-svn: 239994
This commit is contained in:
Peter Collingbourne 2015-06-18 05:22:15 +00:00
parent ae7fa78e91
commit 8b2492f2a0
3 changed files with 42 additions and 0 deletions
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8
lld/COFF/InputFiles.cpp
View File

@ -269,6 +269,14 @@ std::error_code BitcodeFile::parse() {
bool Replaceable = (SymbolDef == LTO_SYMBOL_DEFINITION_TENTATIVE ||
(Attrs & LTO_SYMBOL_COMDAT));
SymbolBodies.push_back(new (Alloc) DefinedBitcode(SymName, Replaceable));
const llvm::GlobalValue *GV = M->getSymbolGV(I);
if (GV && GV->hasDLLExportStorageClass()) {
Directives += " /export:";
Directives += SymName;
if (!GV->getValueType()->isFunctionTy())
Directives += ",data";
}
}
}

18
lld/test/COFF/Inputs/export.ll Normal file
View File

@ -0,0 +1,18 @@
target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc"
define void @_DllMainCRTStartup() {
ret void
}
define void @exportfn1() {
ret void
}
define void @exportfn2() {
ret void
}
define dllexport void @exportfn3() {
ret void
}

16
lld/test/COFF/dll.test
View File

@ -10,10 +10,26 @@ EXPORT: Ordinal RVA Name
EXPORT-NEXT: 0 0
EXPORT-NEXT: 1 0x1008 exportfn1
EXPORT-NEXT: 2 0x1010 exportfn2
EXPORT-NEXT: 3 0x1010 exportfn3
# RUN: llvm-as -o %t.lto.obj %p/Inputs/export.ll
# RUN: lld -flavor link2 /out:%t.lto.dll /dll %t.lto.obj /export:exportfn1 /export:exportfn2
# RUN: llvm-objdump -p %t.lto.dll | FileCheck -check-prefix=EXPORT-LTO %s
EXPORT-LTO: Export Table:
EXPORT-LTO: DLL name: dll.test.tmp.lto.dll
EXPORT-LTO: Ordinal RVA Name
EXPORT-LTO-NEXT: 0 0
EXPORT-LTO-NEXT: 1 0x1010 exportfn1
EXPORT-LTO-NEXT: 2 0x1020 exportfn2
EXPORT-LTO-NEXT: 3 0x1030 exportfn3
# RUN: yaml2obj < %p/Inputs/import.yaml > %t2.obj
# RUN: lld -flavor link2 /out:%t2.exe %t2.obj %t.lib
# RUN: llvm-readobj -coff-imports %t2.exe | FileCheck -check-prefix=IMPORT %s
# RUN: lld -flavor link2 /out:%t2.lto.exe %t2.obj %t.lto.lib
# RUN: llvm-readobj -coff-imports %t2.lto.exe | FileCheck -check-prefix=IMPORT %s
IMPORT: Symbol: exportfn1
IMPORT: Symbol: exportfn2