commit 72ac148d4964fbff950fe11a0eeeda73973b849b
author Chris Lattner <sabre@nondot.org> Thu Oct 16 18:29:00 2003 +0000
committer Chris Lattner <sabre@nondot.org> Thu Oct 16 18:29:00 2003 +0000
tree fde7ca11baf974328570db3b0d678d98e576fb30
parent 6b25242a4ba80e8c3a8a2664eefeba9c69814012

Add support for 'weak' linkage.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9171 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/CBackend/CBackend.cpp

diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp
index af33e4b..a34f3f7 100644
--- a/lib/Target/CBackend/CBackend.cpp
+++ b/lib/Target/CBackend/CBackend.cpp
@@ -684,6 +684,8 @@
         printType(Out, I->getType()->getElementType(), Mang->getValueName(I));
         if (I->hasLinkOnceLinkage())
           Out << " __attribute__((common))";
+        else if (I->hasWeakLinkage())
+          Out << " __attribute__((weak))";
         if (!I->getInitializer()->isNullValue()) {
           Out << " = " ;
           writeOperand(I->getInitializer());
@@ -893,6 +895,8 @@
   FunctionInnards << ")";
   // Print out the return type and the entire signature for that matter
   printType(Out, F->getReturnType(), FunctionInnards.str());
+
+  if (F->hasWeakLinkage()) Out << " __attribute((weak))";
 }
 
 void CWriter::printFunction(Function *F) {

lib/Target/CBackend/Writer.cpp

diff --git a/lib/Target/CBackend/Writer.cpp b/lib/Target/CBackend/Writer.cpp
index af33e4b..a34f3f7 100644
--- a/lib/Target/CBackend/Writer.cpp
+++ b/lib/Target/CBackend/Writer.cpp
@@ -684,6 +684,8 @@
         printType(Out, I->getType()->getElementType(), Mang->getValueName(I));
         if (I->hasLinkOnceLinkage())
           Out << " __attribute__((common))";
+        else if (I->hasWeakLinkage())
+          Out << " __attribute__((weak))";
         if (!I->getInitializer()->isNullValue()) {
           Out << " = " ;
           writeOperand(I->getInitializer());
@@ -893,6 +895,8 @@
   FunctionInnards << ")";
   // Print out the return type and the entire signature for that matter
   printType(Out, F->getReturnType(), FunctionInnards.str());
+
+  if (F->hasWeakLinkage()) Out << " __attribute((weak))";
 }
 
 void CWriter::printFunction(Function *F) {

lib/Target/X86/Printer.cpp

diff --git a/lib/Target/X86/Printer.cpp b/lib/Target/X86/Printer.cpp
index fbc6b6e..f8c006c 100644
--- a/lib/Target/X86/Printer.cpp
+++ b/lib/Target/X86/Printer.cpp
@@ -948,7 +948,8 @@
       unsigned Align = TD.getTypeAlignment(C->getType());
 
       if (C->isNullValue() && 
-          (I->hasLinkOnceLinkage() || I->hasInternalLinkage())) {
+          (I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
+           I->hasWeakLinkage() /* FIXME: Verify correct */)) {
         SwitchSection(O, CurSection, ".data");
         if (I->hasInternalLinkage())
           O << "\t.local " << name << "\n";
@@ -961,6 +962,7 @@
       } else {
         switch (I->getLinkage()) {
         case GlobalValue::LinkOnceLinkage:
+        case GlobalValue::WeakLinkage:   // FIXME: Verify correct for weak.
           // Nonnull linkonce -> weak
           O << "\t.weak " << name << "\n";
           SwitchSection(O, CurSection, "");

lib/Target/X86/X86AsmPrinter.cpp

diff --git a/lib/Target/X86/X86AsmPrinter.cpp b/lib/Target/X86/X86AsmPrinter.cpp
index fbc6b6e..f8c006c 100644
--- a/lib/Target/X86/X86AsmPrinter.cpp
+++ b/lib/Target/X86/X86AsmPrinter.cpp
@@ -948,7 +948,8 @@
       unsigned Align = TD.getTypeAlignment(C->getType());
 
       if (C->isNullValue() && 
-          (I->hasLinkOnceLinkage() || I->hasInternalLinkage())) {
+          (I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
+           I->hasWeakLinkage() /* FIXME: Verify correct */)) {
         SwitchSection(O, CurSection, ".data");
         if (I->hasInternalLinkage())
           O << "\t.local " << name << "\n";
@@ -961,6 +962,7 @@
       } else {
         switch (I->getLinkage()) {
         case GlobalValue::LinkOnceLinkage:
+        case GlobalValue::WeakLinkage:   // FIXME: Verify correct for weak.
           // Nonnull linkonce -> weak
           O << "\t.weak " << name << "\n";
           SwitchSection(O, CurSection, "");