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Emit data or code export directives based on the type.

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Currently we look at the Aliasee to decide what type of export
directive to use. It seems better to use the type of the alias
directly. This is similar to how we handle the alias having the
same address but other attributes (linkage, visibility) from the
aliasee.

With this patch it is now possible to do things like

target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc"
@foo = global [6 x i8] c"\B8*\00\00\00\C3", section ".text", align 16
@f = dllexport alias i32 (), [6 x i8]* @foo
!llvm.module.flags = !{!0}
!0 = metadata !{i32 6, metadata !"Linker Options", metadata !1}
!1 = metadata !{metadata !2, metadata !3}
!2 = metadata !{metadata !"/DEFAULTLIB:libcmt.lib"}
!3 = metadata !{metadata !"/DEFAULTLIB:oldnames.lib"}

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209600 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2014-05-25 12:49:07 +00:00
parent fba226fc52
commit c385367909
2 changed files with 7 additions and 7 deletions
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10
lib/Target/X86/X86AsmPrinter.cpp
View File

@ -670,16 +670,12 @@ void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
DLLExportedGlobals.push_back(getSymbol(&Global));
for (const auto &Alias : M.aliases()) {
const GlobalValue *GV = &Alias;
if (!GV->hasDLLExportStorageClass())
if (!Alias.hasDLLExportStorageClass())
continue;
while (const GlobalAlias *A = dyn_cast<GlobalAlias>(GV))
GV = A->getAliasee();
if (isa<Function>(GV))
if (Alias.getType()->getElementType()->isFunctionTy())
DLLExportedFns.push_back(getSymbol(&Alias));
else if (isa<GlobalVariable>(GV))
else
DLLExportedGlobals.push_back(getSymbol(&Alias));
}

4
test/CodeGen/X86/dllexport-x86_64.ll
View File

@ -72,6 +72,8 @@ define weak_odr dllexport void @weak1() {
; CHECK: weak_alias = f1
@weak_alias = dllexport alias weak_odr void()* @f1
@blob = global [6 x i8] c"\B8*\00\00\00\C3", section ".text", align 16
@blob_alias = dllexport alias i32 (), [6 x i8]* @blob
; CHECK: .section .drectve
; WIN32: /EXPORT:Var1,DATA"
@ -88,6 +90,7 @@ define weak_odr dllexport void @weak1() {
; WIN32: /EXPORT:alias2"
; WIN32: /EXPORT:alias3"
; WIN32: /EXPORT:weak_alias"
; WIN32: /EXPORT:blob_alias"
; MINGW: -export:Var1,data"
; MINGW: -export:Var2,data"
; MINGW: -export:Var3,data"
@ -102,3 +105,4 @@ define weak_odr dllexport void @weak1() {
; MINGW: -export:alias2"
; MINGW: -export:alias3"
; MINGW: -export:weak_alias"
; MINGW: -export:blob_alias"