Adding dllimport, dllexport and external weak linkage types.

DLL* linkages got full (I hope) codegeneration support in C & both x86
assembler backends.
External weak linkage added for future use, we don't provide any
codegeneration, etc. support for it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30374 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 3 deletions

diff --git a/lib/VMCore/Mangler.cpp b/lib/VMCore/Mangler.cpp
index 8715498b9c..b3211a3153 100644
--- a/lib/VMCore/Mangler.cpp
+++ b/lib/VMCore/Mangler.cpp
@@ -162,11 +162,16 @@ void Mangler::InsertName(GlobalValue *GV,
     ExistingValue = GV;
   } else {
     // If GV is external but the existing one is static, mangle the existing one
-    if (GV->hasExternalLinkage() && !ExistingValue->hasExternalLinkage()) {
+    if ((GV->hasExternalLinkage() || GV->hasDLLImportLinkage()) &&
+        !(ExistingValue->hasExternalLinkage() || ExistingValue->hasDLLImportLinkage())) {
       MangledGlobals.insert(ExistingValue);
       ExistingValue = GV;
-    } else if (GV->hasExternalLinkage() && ExistingValue->hasExternalLinkage()&&
-               GV->isExternal() && ExistingValue->isExternal()) {
+    } else if ((GV->hasExternalLinkage() ||
+                GV->hasDLLImportLinkage()) &&
+               (ExistingValue->hasExternalLinkage() ||
+                ExistingValue->hasDLLImportLinkage()) &&
+               GV->isExternal() &&
+               ExistingValue->isExternal()) {
       // If the two globals both have external inkage, and are both external,
       // don't mangle either of them, we just have some silly type mismatch.
     } else {