Make sure functions containing inline asm are never inlined to avoid

duplicated labels.

gen/asmstmt.cpp

@@ -450,6 +450,9 @@ void AsmBlockStatement::toIR(IRState* p)
     LOG_SCOPE;
     Logger::println("BEGIN ASM");
 
+    // disable inlining
+    gIR->func()->setNeverInline();
+
     // create asm block structure
     assert(!p->asmBlock);
     IRAsmBlock* asmblock = new IRAsmBlock;

ir/irfunction.cpp

@@ -63,3 +63,17 @@ void IrFunction::popLabelScope()
     labelScopes.pop_back();
     nextUnique.pop();
 }
+
+void IrFunction::setNeverInline()
+{
+    llvm::FunctionNotes cur = func->getNotes();
+    assert(!(cur & llvm::FN_NOTE_AlwaysInline) && "function can't be never- and always-inline at the same time");
+    func->setNotes(cur | llvm::FN_NOTE_NoInline);
+}
+
+void IrFunction::setAlwaysInline()
+{
+    llvm::FunctionNotes cur = func->getNotes();
+    assert(!(cur & llvm::FN_NOTE_NoInline) && "function can't be never- and always-inline at the same time");
+    func->setNotes(cur | llvm::FN_NOTE_AlwaysInline);
+}

ir/irfunction.h

@@ -52,6 +52,10 @@ struct IrFunction : IrBase
 
     IrFunction(FuncDeclaration* fd);
 
+    // annotations
+    void setNeverInline();
+    void setAlwaysInline();
+
 private:
     // prefix for labels and gotos
     // used for allowing labels to be emitted twice