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-rw-r--r--lib/Transforms/IPO/SimplifyLibCalls.cpp6
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/Transforms/IPO/SimplifyLibCalls.cpp b/lib/Transforms/IPO/SimplifyLibCalls.cpp
index 79cdf28e0a..9f9c52788b 100644
--- a/lib/Transforms/IPO/SimplifyLibCalls.cpp
+++ b/lib/Transforms/IPO/SimplifyLibCalls.cpp
@@ -178,8 +178,10 @@ public:
// 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