commit 266c7bbbbcc4b326dea82e577de1a415d6acc23e
author Chris Lattner <sabre@nondot.org> Mon Apr 13 05:44:34 2009 +0000
committer Chris Lattner <sabre@nondot.org> Mon Apr 13 05:44:34 2009 +0000
tree e880304f13d90f5926ead058f546b05e325dd5a2
parent 2c71b8f64f571b34e8df2a83120a2e889627b8d4

Add a new "available_externally" linkage type.  This is intended
to support C99 inline, GNU extern inline, etc.  Related bugzilla's
include PR3517, PR3100, & PR2933.  Nothing uses this yet, but it
appears to work.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68940 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/AsmPrinter/AsmPrinter.cpp

diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index d19e9af..0979ced 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -443,7 +443,9 @@
   }
 
   // Ignore debug and non-emitted data.
-  if (GV->getSection() == "llvm.metadata") return true;
+  if (GV->getSection() == "llvm.metadata" ||
+      GV->hasAvailableExternallyLinkage())
+    return true;
   
   if (!GV->hasAppendingLinkage()) return false;
 

lib/CodeGen/AsmPrinter/DwarfWriter.cpp

diff --git a/lib/CodeGen/AsmPrinter/DwarfWriter.cpp b/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
index d59609b..4582f4a 100644
--- a/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
@@ -3519,6 +3519,9 @@
   ///
   void EmitEHFrame(const FunctionEHFrameInfo &EHFrameInfo) {
     Function::LinkageTypes linkage = EHFrameInfo.function->getLinkage();
+    
+    assert(!EHFrameInfo.function->hasAvailableExternallyLinkage() && 
+           "Should not emit 'available externally' functions at all");
 
     Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
 

lib/CodeGen/MachineFunction.cpp

diff --git a/lib/CodeGen/MachineFunction.cpp b/lib/CodeGen/MachineFunction.cpp
index bd7105f..18a040e 100644
--- a/lib/CodeGen/MachineFunction.cpp
+++ b/lib/CodeGen/MachineFunction.cpp
@@ -38,8 +38,14 @@
 static AnnotationID MF_AID(
   AnnotationManager::getID("CodeGen::MachineCodeForFunction"));
 
-// Out of line virtual function to home classes.
-void MachineFunctionPass::virtfn() {}
+bool MachineFunctionPass::runOnFunction(Function &F) {
+  // Do not codegen any 'available_externally' functions at all, they have
+  // definitions outside the translation unit.
+  if (F.hasAvailableExternallyLinkage())
+    return false;
+  
+  return runOnMachineFunction(MachineFunction::get(&F));
+}
 
 namespace {
   struct VISIBILITY_HIDDEN Printer : public MachineFunctionPass {