CodeGen: Add a target option for emitting .addrsig directives for all address-significant symbols.

Differential Revision: https://reviews.llvm.org/D48143

llvm-svn: 337331

1 files changed, 8 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 1b1edfbd154..30c95a7138d 100644
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -1529,6 +1529,14 @@ bool AsmPrinter::doFinalization(Module &M) {
     }
   }
 
+  if (TM.Options.EmitAddrsig) {
+    // Emit address-significance attributes for all globals.
+    OutStreamer->EmitAddrsig();
+    for (const GlobalValue &GV : M.global_values())
+      if (!GV.getName().startswith("llvm.") && !GV.hasAtLeastLocalUnnamedAddr())
+        OutStreamer->EmitAddrsigSym(getSymbol(&GV));
+  }
+
   // Allow the target to emit any magic that it wants at the end of the file,
   // after everything else has gone out.
   EmitEndOfAsmFile(M);