From 06f9d4012fb8acea3e9861d5722b5965dbb724d9 Mon Sep 17 00:00:00 2001
From: Roman Divacky <rdivacky@FreeBSD.org>
Date: Tue, 1 Dec 2009 11:07:05 +0000
Subject: Update LLVM to r90226.

---
 lib/Transforms/IPO/GlobalOpt.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'lib/Transforms/IPO/GlobalOpt.cpp')

diff --git a/lib/Transforms/IPO/GlobalOpt.cpp b/lib/Transforms/IPO/GlobalOpt.cpp
index 442f2fb65528..4635d0e61c39 100644
--- a/lib/Transforms/IPO/GlobalOpt.cpp
+++ b/lib/Transforms/IPO/GlobalOpt.cpp
@@ -1898,6 +1898,15 @@ bool GlobalOpt::OptimizeGlobalVars(Module &M) {
     // Global variables without names cannot be referenced outside this module.
     if (!GV->hasName() && !GV->isDeclaration())
       GV->setLinkage(GlobalValue::InternalLinkage);
+    // Simplify the initializer.
+    if (GV->hasInitializer())
+      if (ConstantExpr *CE = dyn_cast<ConstantExpr>(GV->getInitializer())) {
+        TargetData *TD = getAnalysisIfAvailable<TargetData>();
+        Constant *New = ConstantFoldConstantExpression(CE, TD);
+        if (New && New != CE)
+          GV->setInitializer(New);
+      }
+    // Do more involved optimizations if the global is internal.
     if (!GV->isConstant() && GV->hasLocalLinkage() &&
         GV->hasInitializer())
       Changed |= ProcessInternalGlobal(GV, GVI);
-- 
cgit v1.2.3