From 305b8a5f62c9d027f3d8a870fc12fc2abf69aeea Mon Sep 17 00:00:00 2001
From: Lauro Ramos Venancio <lauro.venancio@gmail.com>
Date: Wed, 25 Apr 2007 14:50:40 +0000
Subject: [PATCH] remember to emit weak reference in one more case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36438 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM/ARMAsmPrinter.cpp |  7 ++++++-
 test/CodeGen/ARM/weak2.ll        | 18 ++++++++++++++++++
 2 files changed, 24 insertions(+), 1 deletion(-)
 create mode 100644 test/CodeGen/ARM/weak2.ll

diff --git a/lib/Target/ARM/ARMAsmPrinter.cpp b/lib/Target/ARM/ARMAsmPrinter.cpp
index 6822e632824..6e9a9038dc4 100644
--- a/lib/Target/ARM/ARMAsmPrinter.cpp
+++ b/lib/Target/ARM/ARMAsmPrinter.cpp
@@ -639,8 +639,13 @@ void ARMAsmPrinter::printCPInstOperand(const MachineInstr *MI, int OpNo,
     
     if (MCPE.isMachineConstantPoolEntry())
       EmitMachineConstantPoolValue(MCPE.Val.MachineCPVal);
-    else
+    else {
       EmitGlobalConstant(MCPE.Val.ConstVal);
+      // remember to emit the weak reference
+      if (const GlobalValue *GV = dyn_cast<GlobalValue>(MCPE.Val.ConstVal))
+        if (GV->hasExternalWeakLinkage())
+          ExtWeakSymbols.insert(GV);
+    }
   }
 }
 
diff --git a/test/CodeGen/ARM/weak2.ll b/test/CodeGen/ARM/weak2.ll
new file mode 100644
index 00000000000..a57a76707ce
--- /dev/null
+++ b/test/CodeGen/ARM/weak2.ll
@@ -0,0 +1,18 @@
+; RUN: llvm-as < %s | llc -march=arm | grep .weak
+
+define i32 @f(i32 %a) {
+entry:
+	%tmp2 = icmp eq i32 %a, 0		; <i1> [#uses=1]
+	%t.0 = select i1 %tmp2, i32 (...)* null, i32 (...)* @test_weak		; <i32 (...)*> [#uses=2]
+	%tmp5 = icmp eq i32 (...)* %t.0, null		; <i1> [#uses=1]
+	br i1 %tmp5, label %UnifiedReturnBlock, label %cond_true8
+
+cond_true8:		; preds = %entry
+	%tmp10 = tail call i32 (...)* %t.0( )		; <i32> [#uses=1]
+	ret i32 %tmp10
+
+UnifiedReturnBlock:		; preds = %entry
+	ret i32 250
+}
+
+declare extern_weak i32 @test_weak(...)