[CodeGen] Check if the Decl pointer passed is null, and if so, return

early.

This is needed in a patch I plan to commit later, in which a null Decl
pointer is passed to SetLLVMFunctionAttributesForDefinition.

Relevant discussion is in http://reviews.llvm.org/D13525.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@249722 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index 40eb678d5854d02b1283fff03ba8ca481f532dae..dd8e76ec50c39b526a3a265eed295733d3105c2a 100644 (file)
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -786,6 +786,21 @@ void CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D,
   if (!hasUnwindExceptions(LangOpts))
     B.addAttribute(llvm::Attribute::NoUnwind);
 
+  if (LangOpts.getStackProtector() == LangOptions::SSPOn)
+    B.addAttribute(llvm::Attribute::StackProtect);
+  else if (LangOpts.getStackProtector() == LangOptions::SSPStrong)
+    B.addAttribute(llvm::Attribute::StackProtectStrong);
+  else if (LangOpts.getStackProtector() == LangOptions::SSPReq)
+    B.addAttribute(llvm::Attribute::StackProtectReq);
+
+  if (!D) {
+    F->addAttributes(llvm::AttributeSet::FunctionIndex,
+                     llvm::AttributeSet::get(
+                         F->getContext(),
+                         llvm::AttributeSet::FunctionIndex, B));
+    return;
+  }
+
   if (D->hasAttr<NakedAttr>()) {
     // Naked implies noinline: we should not be inlining such functions.
     B.addAttribute(llvm::Attribute::Naked);
@@ -810,13 +825,6 @@ void CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D,
   if (D->hasAttr<MinSizeAttr>())
     B.addAttribute(llvm::Attribute::MinSize);
 
-  if (LangOpts.getStackProtector() == LangOptions::SSPOn)
-    B.addAttribute(llvm::Attribute::StackProtect);
-  else if (LangOpts.getStackProtector() == LangOptions::SSPStrong)
-    B.addAttribute(llvm::Attribute::StackProtectStrong);
-  else if (LangOpts.getStackProtector() == LangOptions::SSPReq)
-    B.addAttribute(llvm::Attribute::StackProtectReq);
-
   F->addAttributes(llvm::AttributeSet::FunctionIndex,
                    llvm::AttributeSet::get(
                        F->getContext(), llvm::AttributeSet::FunctionIndex, B));