commit 6dff814cdfc896d68a978e0c0910f0333000d2cf
author Rafael Espindola <rafael.espindola@gmail.com> Thu Jun 25 20:10:45 2015 +0000
committer Rafael Espindola <rafael.espindola@gmail.com> Thu Jun 25 20:10:45 2015 +0000
tree a8e9fad47f95b6562d42f52ff9befa73c18712ee
parent b7e8ef005fb3d20d82a06a2393275da823081236

Diagnose undefined temporary symbols.

We already disallowed

.global .Lfoo

so this is reasonable.

This is a small cherry pick from r240130.

llvm-svn: 240681

llvm/lib/MC/ELFObjectWriter.cpp

diff --git a/llvm/lib/MC/ELFObjectWriter.cpp b/llvm/lib/MC/ELFObjectWriter.cpp
index db9c759..9252621 100644
--- a/llvm/lib/MC/ELFObjectWriter.cpp
+++ b/llvm/lib/MC/ELFObjectWriter.cpp
@@ -787,10 +787,15 @@
                     Renames.count(&Symbol)))
       continue;
 
+    if (Symbol.isTemporary() && Symbol.isUndefined())
+      Ctx.reportFatalError(SMLoc(), "Undefined temporary");
+
     ELFSymbolData MSD;
     MSD.Symbol = cast<MCSymbolELF>(&Symbol);
 
     bool Local = Symbol.getBinding() == ELF::STB_LOCAL;
+    assert(Local || !Symbol.isTemporary());
+
     if (Symbol.isAbsolute()) {
       MSD.SectionIndex = ELF::SHN_ABS;
     } else if (Symbol.isCommon()) {