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.
llvm-svn: 30374
diff --git a/llvm/lib/Transforms/IPO/SimplifyLibCalls.cpp b/llvm/lib/Transforms/IPO/SimplifyLibCalls.cpp
index 79cdf28..9f9c527 100644
--- a/llvm/lib/Transforms/IPO/SimplifyLibCalls.cpp
+++ b/llvm/lib/Transforms/IPO/SimplifyLibCalls.cpp
@@ -178,8 +178,10 @@
// All the "well-known" functions are external and have external linkage
// because they live in a runtime library somewhere and were (probably)
// not compiled by LLVM. So, we only act on external functions that
- // have external linkage and non-empty uses.
- if (!FI->isExternal() || !FI->hasExternalLinkage() || FI->use_empty())
+ // have external or dllimport linkage and non-empty uses.
+ if (!FI->isExternal() ||
+ !(FI->hasExternalLinkage() || FI->hasDLLImportLinkage()) ||
+ FI->use_empty())
continue;
// Get the optimization class that pertains to this function