[LLVMgold] Don't set undefined symbol as prevailing
Differential revision: https://reviews.llvm.org/D41113
llvm-svn: 320794
diff --git a/llvm/lib/LTO/LTO.cpp b/llvm/lib/LTO/LTO.cpp
index 9c73779..d6b50f5 100644
--- a/llvm/lib/LTO/LTO.cpp
+++ b/llvm/lib/LTO/LTO.cpp
@@ -416,8 +416,11 @@
auto &GlobalRes = GlobalResolutions[Sym.getName()];
GlobalRes.UnnamedAddr &= Sym.isUnnamedAddr();
- if (Res.Prevailing)
+ if (Res.Prevailing) {
+ assert((GlobalRes.IRName.empty() || !Sym.getIRName().empty()) &&
+ "Overriding existing resolution with undefined asm symbol");
GlobalRes.IRName = Sym.getIRName();
+ }
// Set the partition to external if we know it is re-defined by the linker
// with -defsym or -wrap options, used elsewhere, e.g. it is visible to a