From aac1bfb99a7a43ce145748f41f64f970f5499de6 Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Thu, 27 Aug 2009 17:55:13 +0000
Subject: [PATCH] Teach getUnderlyingObject and skipPointerCasts about
 GlobalAliases.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80265 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/VMCore/Value.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/VMCore/Value.cpp b/lib/VMCore/Value.cpp
index 34291b9d728..f6740626096 100644
--- a/lib/VMCore/Value.cpp
+++ b/lib/VMCore/Value.cpp
@@ -340,6 +340,10 @@ Value *Value::stripPointerCasts() {
       V = GEP->getPointerOperand();
     } else if (Operator::getOpcode(V) == Instruction::BitCast) {
       V = cast<Operator>(V)->getOperand(0);
+    } else if (GlobalAlias *GA = dyn_cast<GlobalAlias>(V)) {
+      if (GA->mayBeOverridden())
+        return V;
+      V = GA->getAliasee();
     } else {
       return V;
     }
@@ -357,6 +361,10 @@ Value *Value::getUnderlyingObject() {
       V = GEP->getPointerOperand();
     } else if (Operator::getOpcode(V) == Instruction::BitCast) {
       V = cast<Operator>(V)->getOperand(0);
+    } else if (GlobalAlias *GA = dyn_cast<GlobalAlias>(V)) {
+      if (GA->mayBeOverridden())
+        return V;
+      V = GA->getAliasee();
     } else {
       return V;
     }