[CodeGen] Require a name for a block addr target

Summary:
A block address may be used in inline assembly. In which case it
requires a name so that the asm parser has something to parse. Creating
a name for every block address is a large hammer, but is necessary
because at the point when a temp symbol is created we don't necessarily
know if it's used in inline asm. This ensures that it exists regardless.

Reviewers: nickdesaulniers, craig.topper

Subscribers: nathanchance, javed.absar, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D65352

llvm-svn: 368478

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/MachineModuleInfo.cpp b/llvm/lib/CodeGen/MachineModuleInfo.cpp
index 6ac9d3dfc2e..3dca5a619bc 100644
--- a/llvm/lib/CodeGen/MachineModuleInfo.cpp
+++ b/llvm/lib/CodeGen/MachineModuleInfo.cpp
@@ -121,7 +121,7 @@ ArrayRef<MCSymbol *> MMIAddrLabelMap::getAddrLabelSymbolToEmit(BasicBlock *BB) {
   BBCallbacks.back().setMap(this);
   Entry.Index = BBCallbacks.size() - 1;
   Entry.Fn = BB->getParent();
-  Entry.Symbols.push_back(Context.createTempSymbol());
+  Entry.Symbols.push_back(Context.createTempSymbol(!BB->hasAddressTaken()));
   return Entry.Symbols;
 }