From 4e0b6b4bf0f6c190868b1d3d4385be88a4598d7e Mon Sep 17 00:00:00 2001
From: Christian Kamm <kamm@incasoftware.de>
Date: Mon, 8 Sep 2008 20:38:55 +0200
Subject: [PATCH] Make sure functions containing inline asm are never inlined
 to avoid duplicated labels.

---
 gen/asmstmt.cpp   |  3 +++
 ir/irfunction.cpp | 14 ++++++++++++++
 ir/irfunction.h   |  4 ++++
 3 files changed, 21 insertions(+)

diff --git a/gen/asmstmt.cpp b/gen/asmstmt.cpp
index c62a1d2a..e9ce04c3 100644
--- a/gen/asmstmt.cpp
+++ b/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;
diff --git a/ir/irfunction.cpp b/ir/irfunction.cpp
index aeeb048d..dbb96ba9 100644
--- a/ir/irfunction.cpp
+++ b/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);
+}
diff --git a/ir/irfunction.h b/ir/irfunction.h
index a08d7f22..7f569163 100644
--- a/ir/irfunction.h
+++ b/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