From bc1f989e3c58b24faf37a149a1ede294483b09b8 Mon Sep 17 00:00:00 2001
From: Matthijs Kooijman <matthijs@stdin.nl>
Date: Thu, 17 Jul 2008 11:59:53 +0000
Subject: [PATCH] Make GlobalOpt preserve address spaces when scalar replacing
 aggregate globals.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53716 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/IPO/GlobalOpt.cpp              |  6 ++--
 .../GlobalOpt/2008-07-17-addrspace.ll         | 28 +++++++++++++++++++
 2 files changed, 32 insertions(+), 2 deletions(-)
 create mode 100644 test/Transforms/GlobalOpt/2008-07-17-addrspace.ll

diff --git a/lib/Transforms/IPO/GlobalOpt.cpp b/lib/Transforms/IPO/GlobalOpt.cpp
index 5c96317a8a5..c3a21b42389 100644
--- a/lib/Transforms/IPO/GlobalOpt.cpp
+++ b/lib/Transforms/IPO/GlobalOpt.cpp
@@ -486,7 +486,8 @@ static GlobalVariable *SRAGlobal(GlobalVariable *GV, const TargetData &TD) {
                                                GlobalVariable::InternalLinkage,
                                                In, GV->getName()+"."+utostr(i),
                                                (Module *)NULL,
-                                               GV->isThreadLocal());
+                                               GV->isThreadLocal(),
+                                               GV->getType()->getAddressSpace());
       Globals.insert(GV, NGV);
       NewGlobals.push_back(NGV);
       
@@ -520,7 +521,8 @@ static GlobalVariable *SRAGlobal(GlobalVariable *GV, const TargetData &TD) {
                                                GlobalVariable::InternalLinkage,
                                                In, GV->getName()+"."+utostr(i),
                                                (Module *)NULL,
-                                               GV->isThreadLocal());
+                                               GV->isThreadLocal(),
+                                               GV->getType()->getAddressSpace());
       Globals.insert(GV, NGV);
       NewGlobals.push_back(NGV);
       
diff --git a/test/Transforms/GlobalOpt/2008-07-17-addrspace.ll b/test/Transforms/GlobalOpt/2008-07-17-addrspace.ll
new file mode 100644
index 00000000000..fd9d0885f27
--- /dev/null
+++ b/test/Transforms/GlobalOpt/2008-07-17-addrspace.ll
@@ -0,0 +1,28 @@
+; This test lets globalopt split the global struct and array into different
+; values. This used to crash, because globalopt forgot to put the new var in the
+; same address space as the old one.
+
+; RUN: llvm-as < %s | opt -globalopt | llvm-dis > %t
+; Check that the new global values still have their address space
+; RUN: cat %t | grep global.*addrspace
+
+@struct = internal global { i32, i32 } zeroinitializer addrspace(1)
+@array = internal global [ 2 x i32 ] zeroinitializer addrspace(1)
+
+define i32 @foo() {
+  %A = load i32 addrspace(1) * getelementptr ({ i32, i32 } addrspace(1) * @struct, i32 0, i32 0)
+  %B = load i32 addrspace(1) * getelementptr ([ 2 x i32 ] addrspace(1) * @array, i32 0, i32 0)
+  ; Use the loaded values, so they won't get removed completely
+  %R = add i32 %A, %B
+  ret i32 %R
+}
+
+; We put stores in a different function, so that the global variables won't get
+; optimized away completely.
+define void @bar(i32 %R) {
+  store i32 %R, i32 addrspace(1) * getelementptr ([ 2 x i32 ] addrspace(1) * @array, i32 0, i32 0)
+  store i32 %R, i32 addrspace(1) * getelementptr ({ i32, i32 } addrspace(1) * @struct, i32 0, i32 0)
+  ret void
+}
+
+