yaxunl created this revision.
Herald added subscribers: t-tye, tpr, dstuttard, wdng, kzhuravl.

amdgcn target requires global variable to stay in global or constant address 
space.
In C or C++ global variables are emitted in the default (generic) address space
which the amdgcn backend cannot handle.

This patch emits global variables in global or constant address space and cast
them to generic address space, in a similar approach as CUDA.

It also fixes pointer size and metadata issue so that standard initializer list 
is
supported.

This patch was originally part of https://reviews.llvm.org/D33706.


https://reviews.llvm.org/D33842

Files:
  lib/Basic/Targets.cpp
  lib/CodeGen/CGExpr.cpp
  lib/CodeGen/CodeGenModule.cpp
  lib/CodeGen/TargetInfo.cpp
  test/CodeGen/address-space.c
  test/CodeGen/default-address-space.c
  test/CodeGenCXX/amdgcn-automatic-variable.cpp
  test/CodeGenCXX/cxx0x-initializer-stdinitializerlist.cpp

Index: test/CodeGenCXX/cxx0x-initializer-stdinitializerlist.cpp
===================================================================
--- test/CodeGenCXX/cxx0x-initializer-stdinitializerlist.cpp
+++ test/CodeGenCXX/cxx0x-initializer-stdinitializerlist.cpp
@@ -1,4 +1,5 @@
-// RUN: %clang_cc1 -std=c++11 -triple x86_64-none-linux-gnu -emit-llvm -o - %s | FileCheck %s
+// RUN1: %clang_cc1 -std=c++11 -triple x86_64-none-linux-gnu -emit-llvm -o - %s | FileCheck -check-prefixes=X86,CHECK %s
+// RUN: %clang_cc1 -std=c++11 -triple amdgcn-amd-amdhsa-amdgiz -DNO_TLS -emit-llvm -o - %s | FileCheck -check-prefixes=AMD,CHECK %s
 
 namespace std {
   typedef decltype(sizeof(int)) size_t;
@@ -46,62 +47,82 @@
   wantslist1(std::initializer_list<destroyme1>);
   ~wantslist1();
 };
-
-// CHECK: @_ZGR15globalInitList1_ = internal constant [3 x i32] [i32 1, i32 2, i32 3]
-// CHECK: @globalInitList1 = global %{{[^ ]+}} { i32* getelementptr inbounds ([3 x i32], [3 x i32]* @_ZGR15globalInitList1_, i32 0, i32 0), i{{32|64}} 3 }
+// X86: @_ZGR15globalInitList1_ = internal constant [3 x i32] [i32 1, i32 2, i32 3]
+// X86: @globalInitList1 = global %{{[^ ]+}} { i32* getelementptr inbounds ([3 x i32], [3 x i32]* @_ZGR15globalInitList1_, i32 0, i32 0), i{{32|64}} 3 }
+// AMD: @_ZGR15globalInitList1_ = internal addrspace(1) constant [3 x i32] [i32 1, i32 2, i32 3]
+// AMD: @globalInitList1 = addrspace(1) global %{{[^ ]+}} { i32* addrspacecast (i32 addrspace(1)* getelementptr inbounds ([3 x i32], [3 x i32] addrspace(1)* @_ZGR15globalInitList1_, i32 0, i32 0) to i32*), i{{32|64}} 3 }
 std::initializer_list<int> globalInitList1 = {1, 2, 3};
 
+#ifndef NO_TLS
 namespace thread_local_global_array {
   // FIXME: We should be able to constant-evaluate this even though the
   // initializer is not a constant expression (pointers to thread_local
   // objects aren't really a problem).
   //
-  // CHECK: @_ZN25thread_local_global_array1xE = thread_local global
-  // CHECK: @_ZGRN25thread_local_global_array1xE_ = internal thread_local constant [4 x i32] [i32 1, i32 2, i32 3, i32 4]
+  // X86: @_ZN25thread_local_global_array1xE = thread_local global
+  // X86: @_ZGRN25thread_local_global_array1xE_ = internal thread_local constant [4 x i32] [i32 1, i32 2, i32 3, i32 4]
   std::initializer_list<int> thread_local x = { 1, 2, 3, 4 };
 }
-
-// CHECK: @globalInitList2 = global %{{[^ ]+}} zeroinitializer
-// CHECK: @_ZGR15globalInitList2_ = internal global [2 x %[[WITHARG:[^ ]*]]] zeroinitializer
-
-// CHECK: @_ZN15partly_constant1kE = global i32 0, align 4
-// CHECK: @_ZN15partly_constant2ilE = global {{.*}} null, align 8
-// CHECK: @[[PARTLY_CONSTANT_OUTER:_ZGRN15partly_constant2ilE.*]] = internal global {{.*}} zeroinitializer, align 8
-// CHECK: @[[PARTLY_CONSTANT_INNER:_ZGRN15partly_constant2ilE.*]] = internal global [3 x {{.*}}] zeroinitializer, align 8
-// CHECK: @[[PARTLY_CONSTANT_FIRST:_ZGRN15partly_constant2ilE.*]] = internal constant [3 x i32] [i32 1, i32 2, i32 3], align 4
-// CHECK: @[[PARTLY_CONSTANT_SECOND:_ZGRN15partly_constant2ilE.*]] = internal global [2 x i32] zeroinitializer, align 4
-// CHECK: @[[PARTLY_CONSTANT_THIRD:_ZGRN15partly_constant2ilE.*]] = internal constant [4 x i32] [i32 5, i32 6, i32 7, i32 8], align 4
-
-// CHECK: @[[REFTMP1:.*]] = private constant [2 x i32] [i32 42, i32 43], align 4
-// CHECK: @[[REFTMP2:.*]] = private constant [3 x %{{.*}}] [%{{.*}} { i32 1 }, %{{.*}} { i32 2 }, %{{.*}} { i32 3 }], align 4
+#endif
+
+// X86: @globalInitList2 = global %{{[^ ]+}} zeroinitializer
+// X86: @_ZGR15globalInitList2_ = internal global [2 x %[[WITHARG:[^ ]*]]] zeroinitializer
+// AMD: @globalInitList2 = addrspace(1) global %{{[^ ]+}} zeroinitializer
+// AMD: @_ZGR15globalInitList2_ = internal addrspace(1) global [2 x %[[WITHARG:[^ ]*]]] zeroinitializer
+
+// X86: @_ZN15partly_constant1kE = global i32 0, align 4
+// X86: @_ZN15partly_constant2ilE = global {{.*}} null, align 8
+// X86: @[[PARTLY_CONSTANT_OUTER:_ZGRN15partly_constant2ilE.*]] = internal global {{.*}} zeroinitializer, align 8
+// X86: @[[PARTLY_CONSTANT_INNER:_ZGRN15partly_constant2ilE.*]] = internal global [3 x {{.*}}] zeroinitializer, align 8
+// X86: @[[PARTLY_CONSTANT_FIRST:_ZGRN15partly_constant2ilE.*]] = internal constant [3 x i32] [i32 1, i32 2, i32 3], align 4
+// X86: @[[PARTLY_CONSTANT_SECOND:_ZGRN15partly_constant2ilE.*]] = internal global [2 x i32] zeroinitializer, align 4
+// X86: @[[PARTLY_CONSTANT_THIRD:_ZGRN15partly_constant2ilE.*]] = internal constant [4 x i32] [i32 5, i32 6, i32 7, i32 8], align 4
+// AMD: @_ZN15partly_constant1kE = addrspace(1) global i32 0, align 4
+// AMD: @_ZN15partly_constant2ilE = addrspace(2) global {{.*}} null, align 8
+// AMD: @[[PARTLY_CONSTANT_OUTER:_ZGRN15partly_constant2ilE.*]] = internal addrspace(2) global {{.*}} zeroinitializer, align 8
+// AMD: @[[PARTLY_CONSTANT_INNER:_ZGRN15partly_constant2ilE.*]] = internal addrspace(2) global [3 x {{.*}}] zeroinitializer, align 8
+// AMD: @[[PARTLY_CONSTANT_FIRST:_ZGRN15partly_constant2ilE.*]] = internal addrspace(2) constant [3 x i32] [i32 1, i32 2, i32 3], align 4
+// AMD: @[[PARTLY_CONSTANT_SECOND:_ZGRN15partly_constant2ilE.*]] = internal addrspace(2) global [2 x i32] zeroinitializer, align 4
+// AMD: @[[PARTLY_CONSTANT_THIRD:_ZGRN15partly_constant2ilE.*]] = internal addrspace(2) constant [4 x i32] [i32 5, i32 6, i32 7, i32 8], align 4
+
+// X86: @[[REFTMP1:.*]] = private constant [2 x i32] [i32 42, i32 43], align 4
+// X86: @[[REFTMP2:.*]] = private constant [3 x %{{.*}}] [%{{.*}} { i32 1 }, %{{.*}} { i32 2 }, %{{.*}} { i32 3 }], align 4
+// AMD: @[[REFTMP1:.*]] = private addrspace(2) constant [2 x i32] [i32 42, i32 43], align 4
+// AMD: @[[REFTMP2:.*]] = private addrspace(2) constant [3 x %{{.*}}] [%{{.*}} { i32 1 }, %{{.*}} { i32 2 }, %{{.*}} { i32 3 }], align 4
 
 // CHECK: appending global
 
-
 // thread_local initializer:
-// CHECK-LABEL: define internal void
-// CHECK: store i32* getelementptr inbounds ([4 x i32], [4 x i32]* @_ZGRN25thread_local_global_array1xE_, i64 0, i64 0),
-// CHECK:       i32** getelementptr inbounds ({{.*}}, {{.*}}* @_ZN25thread_local_global_array1xE, i32 0, i32 0), align 8
-// CHECK: store i64 4, i64* getelementptr inbounds ({{.*}}, {{.*}}* @_ZN25thread_local_global_array1xE, i32 0, i32 1), align 8
-
-
-// CHECK-LABEL: define internal void
-// CHECK: call void @_ZN8witharg1C1ERK10destroyme1(%[[WITHARG]]* getelementptr inbounds ([2 x %[[WITHARG]]], [2 x %[[WITHARG]]]* @_ZGR15globalInitList2_, i{{32|64}} 0, i{{32|64}} 0
-// CHECK: call void @_ZN8witharg1C1ERK10destroyme1(%[[WITHARG]]* getelementptr inbounds ([2 x %[[WITHARG]]], [2 x %[[WITHARG]]]* @_ZGR15globalInitList2_, i{{32|64}} 0, i{{32|64}} 1
-// CHECK: __cxa_atexit
-// CHECK: store %[[WITHARG]]* getelementptr inbounds ([2 x %[[WITHARG]]], [2 x %[[WITHARG]]]* @_ZGR15globalInitList2_, i64 0, i64 0),
-// CHECK:       %[[WITHARG]]** getelementptr inbounds (%{{.*}}, %{{.*}}* @globalInitList2, i32 0, i32 0), align 8
-// CHECK: store i64 2, i64* getelementptr inbounds (%{{.*}}, %{{.*}}* @globalInitList2, i32 0, i32 1), align 8
-// CHECK: call void @_ZN10destroyme1D1Ev
+// X86-LABEL: define internal void @__cxx_global_var_init
+// X86: store i32* getelementptr inbounds ([4 x i32], [4 x i32]* @_ZGRN25thread_local_global_array1xE_, i64 0, i64 0),
+// X86:       i32** getelementptr inbounds ({{.*}}, {{.*}}* @_ZN25thread_local_global_array1xE, i32 0, i32 0), align 8
+// X86: store i64 4, i64* getelementptr inbounds ({{.*}}, {{.*}}* @_ZN25thread_local_global_array1xE, i32 0, i32 1), align 8
+
+// CHECK-LABEL: define internal void @__cxx_global_var_init
+// X86: call void @_ZN8witharg1C1ERK10destroyme1(%[[WITHARG]]* getelementptr inbounds ([2 x %[[WITHARG]]], [2 x %[[WITHARG]]]* @_ZGR15globalInitList2_, i{{32|64}} 0, i{{32|64}} 0
+// X86: call void @_ZN8witharg1C1ERK10destroyme1(%[[WITHARG]]* getelementptr inbounds ([2 x %[[WITHARG]]], [2 x %[[WITHARG]]]* @_ZGR15globalInitList2_, i{{32|64}} 0, i{{32|64}} 1
+// AMD: call void @_ZN8witharg1C1ERK10destroyme1(%[[WITHARG]]* getelementptr inbounds ([2 x %[[WITHARG]]], [2 x %[[WITHARG]]]* addrspacecast ({{[^@]+}} @_ZGR15globalInitList2_ {{[^)]+}}), i{{32|64}} 0, i{{32|64}} 0
+// AMD: call void @_ZN8witharg1C1ERK10destroyme1(%[[WITHARG]]* getelementptr inbounds ([2 x %[[WITHARG]]], [2 x %[[WITHARG]]]* addrspacecast ({{[^@]+}} @_ZGR15globalInitList2_ {{[^)]+}}), i{{32|64}} 0, i{{32|64}} 1
+// CHECK: call i32 @__cxa_atexit
+// X86: store %[[WITHARG]]* getelementptr inbounds ([2 x %[[WITHARG]]], [2 x %[[WITHARG]]]* @_ZGR15globalInitList2_, i64 0, i64 0),
+// X86:       %[[WITHARG]]** getelementptr inbounds (%{{.*}}, %{{.*}}* @globalInitList2, i32 0, i32 0), align 8
+// X86: store i64 2, i64* getelementptr inbounds (%{{.*}}, %{{.*}}* @globalInitList2, i32 0, i32 1), align 8
+// AMD: store %[[WITHARG]]* getelementptr inbounds ([2 x %[[WITHARG]]], [2 x %[[WITHARG]]]* addrspacecast ({{[^@]+}} @_ZGR15globalInitList2_ {{[^)]+}}), i64 0, i64 0),
+// AMD:       %[[WITHARG]]** getelementptr inbounds (%{{.*}}, %{{.*}}* addrspacecast ({{[^@]+}} @globalInitList2 {{[^)]+}}), i32 0, i32 0), align 8
+// AMD: store i64 2, i64* getelementptr inbounds (%{{.*}}, %{{.*}}* addrspacecast ({{[^@]+}} @globalInitList2 {{[^)]+}}), i32 0, i32 1), align 8
 // CHECK: call void @_ZN10destroyme1D1Ev
+// CHECK-NEXT: call void @_ZN10destroyme1D1Ev
+// CHECK-NEXT: ret void
 std::initializer_list<witharg1> globalInitList2 = {
   witharg1(destroyme1()), witharg1(destroyme1())
 };
 
 void fn1(int i) {
   // CHECK-LABEL: define void @_Z3fn1i
   // temporary array
-  // CHECK: [[array:%[^ ]+]] = alloca [3 x i32]
+  // X86: [[array:%[^ ]+]] = alloca [3 x i32]
+  // AMD: [[alloca:%[^ ]+]] = alloca [3 x i32], align 4, addrspace(5)
+  // AMD: [[array:%[^ ]+]] = addrspacecast [3 x i32] addrspace(5)* [[alloca]] to [3 x i32]*
   // CHECK: getelementptr inbounds [3 x i32], [3 x i32]* [[array]], i{{32|64}} 0
   // CHECK-NEXT: store i32 1, i32*
   // CHECK-NEXT: getelementptr
@@ -175,7 +196,6 @@
   destroyme2 dm2;
   // CHECK: call void @_ZN10destroyme2D1Ev
 }
-
 void fn7() {
   // CHECK-LABEL: define void @_Z3fn7v
   // temps should be destroyed before dm2
@@ -366,37 +386,36 @@
   std::initializer_list<std::initializer_list<int>> &&il = { { 1, 2, 3 }, { 4, k }, { 5, 6, 7, 8 } };
   // First init list.
   // CHECK-NOT: @[[PARTLY_CONSTANT_FIRST]],
-  // CHECK: store i32* getelementptr inbounds ({{.*}}, {{.*}}* @[[PARTLY_CONSTANT_FIRST]], i64 0, i64 0),
-  // CHECK:       i32** getelementptr inbounds ({{.*}}, {{.*}}* @[[PARTLY_CONSTANT_INNER]], i64 0, i64 0, i32 0)
-  // CHECK: store i64 3, i64* getelementptr inbounds ({{.*}}, {{.*}}* @[[PARTLY_CONSTANT_INNER]], i64 0, i64 0, i32 1)
+  // CHECK: store i32* getelementptr inbounds ({{.*}}, {{.*}}* {{.*}}@[[PARTLY_CONSTANT_FIRST]]{{.*}}, i64 0, i64 0),
+  // CHECK:       i32** getelementptr inbounds ({{.*}}, {{.*}}* {{.*}}@[[PARTLY_CONSTANT_INNER]]{{.*}}, i64 0, i64 0, i32 0)
+  // CHECK: store i64 3, i64* getelementptr inbounds ({{.*}}, {{.*}}* {{.*}}@[[PARTLY_CONSTANT_INNER]]{{.*}}, i64 0, i64 0, i32 1)
   // CHECK-NOT: @[[PARTLY_CONSTANT_FIRST]],
   //
   // Second init list array (non-constant).
-  // CHECK: store i32 4, i32* getelementptr inbounds ({{.*}}, {{.*}}* @[[PARTLY_CONSTANT_SECOND]], i64 0, i64 0)
-  // CHECK: load i32, i32* @_ZN15partly_constant1kE
-  // CHECK: store i32 {{.*}}, i32* getelementptr inbounds ({{.*}}, {{.*}}* @[[PARTLY_CONSTANT_SECOND]], i64 0, i64 1)
+  // CHECK: store i32 4, i32* getelementptr inbounds ({{.*}}, {{.*}}* {{.*}}@[[PARTLY_CONSTANT_SECOND]]{{.*}}, i64 0, i64 0)
+  // CHECK: load i32, i32* {{.*}}@_ZN15partly_constant1kE
+  // CHECK: store i32 {{.*}}, i32* getelementptr inbounds ({{.*}}, {{.*}}* {{.*}}@[[PARTLY_CONSTANT_SECOND]]{{.*}}, i64 0, i64 1)
   //
   // Second init list.
-  // CHECK: store i32* getelementptr inbounds ({{.*}}, {{.*}}* @[[PARTLY_CONSTANT_SECOND]], i64 0, i64 0),
-  // CHECK:       i32** getelementptr inbounds ({{.*}}, {{.*}}* @[[PARTLY_CONSTANT_INNER]], i64 0, i64 1, i32 0)
-  // CHECK: store i64 2, i64* getelementptr inbounds ({{.*}}, {{.*}}* @[[PARTLY_CONSTANT_INNER]], i64 0, i64 1, i32 1)
+  // CHECK: store i32* getelementptr inbounds ({{.*}}, {{.*}}* {{.*}}@[[PARTLY_CONSTANT_SECOND]]{{.*}}, i64 0, i64 0),
+  // CHECK:       i32** getelementptr inbounds ({{.*}}, {{.*}}* {{.*}}@[[PARTLY_CONSTANT_INNER]]{{.*}}, i64 0, i64 1, i32 0)
+  // CHECK: store i64 2, i64* getelementptr inbounds ({{.*}}, {{.*}}* {{.*}}@[[PARTLY_CONSTANT_INNER]]{{.*}}, i64 0, i64 1, i32 1)
   //
   // Third init list.
   // CHECK-NOT: @[[PARTLY_CONSTANT_THIRD]],
-  // CHECK: store i32* getelementptr inbounds ({{.*}}, {{.*}}* @[[PARTLY_CONSTANT_THIRD]], i64 0, i64 0),
-  // CHECK:       i32** getelementptr inbounds ({{.*}}, {{.*}}* @[[PARTLY_CONSTANT_INNER]], i64 0, i64 2, i32 0)
-  // CHECK: store i64 4, i64* getelementptr inbounds ({{.*}}, {{.*}}* @_ZGRN15partly_constant2ilE4_, i64 0, i64 2, i32 1)
+  // CHECK: store i32* getelementptr inbounds ({{.*}}, {{.*}}* {{.*}}@[[PARTLY_CONSTANT_THIRD]]{{.*}}, i64 0, i64 0),
+  // CHECK:       i32** getelementptr inbounds ({{.*}}, {{.*}}* {{.*}}@[[PARTLY_CONSTANT_INNER]]{{.*}}, i64 0, i64 2, i32 0)
+  // CHECK: store i64 4, i64* getelementptr inbounds ({{.*}}, {{.*}}* {{.*}}@_ZGRN15partly_constant2ilE4_{{.*}}, i64 0, i64 2, i32 1)
   // CHECK-NOT: @[[PARTLY_CONSTANT_THIRD]],
   //
   // Outer init list.
-  // CHECK: store {{.*}}* getelementptr inbounds ({{.*}}, {{.*}}* @[[PARTLY_CONSTANT_INNER]], i64 0, i64 0),
-  // CHECK:       {{.*}}** getelementptr inbounds ({{.*}}, {{.*}}* @[[PARTLY_CONSTANT_OUTER]], i32 0, i32 0)
-  // CHECK: store i64 3, i64* getelementptr inbounds ({{.*}}, {{.*}}* @[[PARTLY_CONSTANT_OUTER]], i32 0, i32 1)
+  // CHECK: store {{.*}}* getelementptr inbounds ({{.*}}, {{.*}}* {{.*}}@[[PARTLY_CONSTANT_INNER]]{{.*}}, i64 0, i64 0),
+  // CHECK:       {{.*}}** getelementptr inbounds ({{.*}}, {{.*}}* {{.*}}@[[PARTLY_CONSTANT_OUTER]]{{.*}}, i32 0, i32 0)
+  // CHECK: store i64 3, i64* getelementptr inbounds ({{.*}}, {{.*}}* {{.*}}@[[PARTLY_CONSTANT_OUTER]]{{.*}}, i32 0, i32 1)
   //
   // 'il' reference.
-  // CHECK: store {{.*}}* @[[PARTLY_CONSTANT_OUTER]], {{.*}}** @_ZN15partly_constant2ilE, align 8
+  // CHECK: store {{.*}}* {{.*}}@[[PARTLY_CONSTANT_OUTER]]{{.*}}, {{.*}}** {{.*}}@_ZN15partly_constant2ilE{{.*}}, align 8
 }
-
 namespace nested {
   struct A { A(); ~A(); };
   struct B { const A &a; ~B(); };
@@ -463,7 +482,7 @@
   template<int x> void f() { new MyClass({42, 43}); }
   template void f<0>();
   // CHECK-LABEL: define {{.*}} @_ZN7PR204451fILi0EEEvv(
-  // CHECK: store i32* getelementptr inbounds ([2 x i32], [2 x i32]* @[[REFTMP1]], i64 0, i64 0)
+  // CHECK: store i32* getelementptr inbounds ([2 x i32], [2 x i32]* {{.*}}@[[REFTMP1]]{{.*}}, i64 0, i64 0)
   // CHECK: call void @_ZN7PR204456vectorC1ESt16initializer_listIiE(
   // CHECK: call void @_ZN7PR204457MyClassC1ERKNS_6vectorE(
 }
@@ -476,9 +495,9 @@
   };
   void f(std::initializer_list<C>);
   void g() {
-// CHECK-LABEL: _ZN9ConstExpr1gEv
-// CHECK: store %"class.ConstExpr::C"* getelementptr inbounds ([3 x %"class.ConstExpr::C"], [3 x %"class.ConstExpr::C"]* @[[REFTMP2]], i64 0, i64 0)
-// CHECK: call void @_ZN9ConstExpr1fESt16initializer_listINS_1CEE
+    // CHECK-LABEL: _ZN9ConstExpr1gEv
+    // CHECK: store %"class.ConstExpr::C"* getelementptr inbounds ([3 x %"class.ConstExpr::C"], [3 x %"class.ConstExpr::C"]* {{.*}}@[[REFTMP2]]{{.*}}, i64 0, i64 0)
+    // CHECK: call void @_ZN9ConstExpr1fESt16initializer_listINS_1CEE
     f({C(1), C(2), C(3)});
   }
 }
@@ -498,11 +517,13 @@
   void f1() {
     // CHECK-LABEL: @_ZN9B197730102f1Ev
     testcase a{{"", ENUM_CONSTANT}};
-    // CHECK: store %"struct.B19773010::pair"* getelementptr inbounds ([1 x %"struct.B19773010::pair"], [1 x %"struct.B19773010::pair"]* bitcast ([1 x { i8*, i32 }]* @.ref.tmp{{.*}} to [1 x %"struct.B19773010::pair"]*), i64 0, i64 0), %"struct.B19773010::pair"** %{{.*}}, align 8
+    // X86: store %"struct.B19773010::pair"* getelementptr inbounds ([1 x %"struct.B19773010::pair"], [1 x %"struct.B19773010::pair"]* bitcast ([1 x { i8*, i32 }]* @.ref.tmp{{.*}} to [1 x %"struct.B19773010::pair"]*), i64 0, i64 0), %"struct.B19773010::pair"** %{{.*}}, align 8
+    // AMD: store %"struct.B19773010::pair"* getelementptr inbounds ([1 x %"struct.B19773010::pair"], [1 x %"struct.B19773010::pair"]* addrspacecast{{.*}} bitcast ([1 x { i8*, i32 }] addrspace(2)* @.ref.tmp{{.*}} to [1 x %"struct.B19773010::pair"] addrspace(2)*){{.*}}, i64 0, i64 0), %"struct.B19773010::pair"** %{{.*}}, align 8
   }
   void f2() {
     // CHECK-LABEL: @_ZN9B197730102f2Ev
-    // CHECK: store %"struct.B19773010::pair"* getelementptr inbounds ([1 x %"struct.B19773010::pair"], [1 x %"struct.B19773010::pair"]* bitcast ([1 x { i8*, i32 }]* @_ZGRZN9B197730102f2EvE1p_ to [1 x %"struct.B19773010::pair"]*), i64 0, i64 0), %"struct.B19773010::pair"** getelementptr inbounds ([2 x %"class.std::initializer_list.10"], [2 x %"class.std::initializer_list.10"]* @_ZZN9B197730102f2EvE1p, i64 0, i64 1, i32 0), align 16
+    // X86: store %"struct.B19773010::pair"* getelementptr inbounds ([1 x %"struct.B19773010::pair"], [1 x %"struct.B19773010::pair"]* bitcast ([1 x { i8*, i32 }]* @_ZGRZN9B197730102f2EvE1p_ to [1 x %"struct.B19773010::pair"]*), i64 0, i64 0), %"struct.B19773010::pair"** getelementptr inbounds ([2 x %"class.std::initializer_list.10"], [2 x %"class.std::initializer_list.10"]* @_ZZN9B197730102f2EvE1p, i64 0, i64 1, i32 0), align 16
+    // AMD: store %"struct.B19773010::pair"* getelementptr inbounds ([1 x %"struct.B19773010::pair"], [1 x %"struct.B19773010::pair"]* addrspacecast{{.*}} bitcast ([1 x { i8*, i32 }] addrspace(1)* @_ZGRZN9B197730102f2EvE1p_ to [1 x %"struct.B19773010::pair"] addrspace(1)*){{.*}}, i64 0, i64 0), %"struct.B19773010::pair"** getelementptr inbounds ([2 x %"class.std::initializer_list.10"], [2 x %"class.std::initializer_list.10"]* addrspacecast{{.*}}@_ZZN9B197730102f2EvE1p{{.*}}, i64 0, i64 1, i32 0), align 8
     static std::initializer_list<pair<const char *, E>> a, p[2] =
         {a, {{"", ENUM_CONSTANT}}};
   }
Index: test/CodeGenCXX/amdgcn-automatic-variable.cpp
===================================================================
--- test/CodeGenCXX/amdgcn-automatic-variable.cpp
+++ test/CodeGenCXX/amdgcn-automatic-variable.cpp
@@ -15,8 +15,8 @@
   // CHECK: %lv1 = alloca i32, align 4, addrspace(5)
   // CHECK: %lv2 = alloca i32, align 4, addrspace(5)
   // CHECK: %la = alloca [100 x i32], align 4, addrspace(5)
-  // CHECK: %lp1 = alloca i32*, align 4, addrspace(5)
-  // CHECK: %lp2 = alloca i32*, align 4, addrspace(5)
+  // CHECK: %lp1 = alloca i32*, align 8, addrspace(5)
+  // CHECK: %lp2 = alloca i32*, align 8, addrspace(5)
   // CHECK: %lvc = alloca i32, align 4, addrspace(5)
 
   // CHECK: %[[r0:.*]] = addrspacecast i32 addrspace(5)* %lv1 to i32*
@@ -34,12 +34,12 @@
   la[0] = 3;
 
   // CHECK: %[[r3:.*]] = addrspacecast i32* addrspace(5)* %lp1 to i32**
-  // CHECK: store i32* %[[r0]], i32** %[[r3]], align 4
+  // CHECK: store i32* %[[r0]], i32** %[[r3]], align 8
   int *lp1 = &lv1;
 
   // CHECK: %[[r4:.*]] = addrspacecast i32* addrspace(5)* %lp2 to i32**
   // CHECK: %[[arraydecay:.*]] = getelementptr inbounds [100 x i32], [100 x i32]* %[[r2]], i32 0, i32 0
-  // CHECK: store i32* %[[arraydecay]], i32** %[[r4]], align 4
+  // CHECK: store i32* %[[arraydecay]], i32** %[[r4]], align 8
   int *lp2 = la;
 
   // CHECK: call void @_Z5func1Pi(i32* %[[r0]])
@@ -80,3 +80,5 @@
   // CHECK: call void @_Z5func1Pi(i32* %[[r0]])
   func1(&x);
 }
+
+// CHECK-NOT: !opencl.ocl.version 
Index: test/CodeGen/default-address-space.c
===================================================================
--- test/CodeGen/default-address-space.c
+++ test/CodeGen/default-address-space.c
@@ -1,24 +1,24 @@
 // RUN: %clang_cc1 -triple amdgcn -emit-llvm < %s | FileCheck -check-prefixes=PIZ,COM %s
 // RUN: %clang_cc1 -triple amdgcn---amdgiz -emit-llvm < %s | FileCheck -check-prefixes=CHECK,COM %s
 
-// PIZ-DAG: @foo = common addrspace(4) global i32 0
-// CHECK-DAG: @foo = common global i32 0
+// PIZ-DAG: @foo = common addrspace(1) global i32 0
+// CHECK-DAG: @foo = common addrspace(1) global i32 0
 int foo;
 
-// PIZ-DAG: @ban = common addrspace(4) global [10 x i32] zeroinitializer
-// CHECK-DAG: @ban = common global [10 x i32] zeroinitializer
+// PIZ-DAG: @ban = common addrspace(1) global [10 x i32] zeroinitializer
+// CHECK-DAG: @ban = common addrspace(1) global [10 x i32] zeroinitializer
 int ban[10];
 
-// PIZ-DAG: @A = common addrspace(4) global i32 addrspace(4)* null
-// PIZ-DAG: @B = common addrspace(4) global i32 addrspace(4)* null
-// CHECK-DAG: @A = common global i32* null
-// CHECK-DAG: @B = common global i32* null
+// PIZ-DAG: @A = common addrspace(1) global i32 addrspace(4)* null
+// PIZ-DAG: @B = common addrspace(1) global i32 addrspace(4)* null
+// CHECK-DAG: @A = common addrspace(1) global i32* null
+// CHECK-DAG: @B = common addrspace(1) global i32* null
 int *A;
 int *B;
 
 // COM-LABEL: define i32 @test1()
-// PIZ: load i32, i32 addrspace(4)* @foo
-// CHECK: load i32, i32* @foo
+// PIZ: load i32, i32 addrspace(4)* addrspacecast{{[^@]+}} @foo
+// CHECK: load i32, i32* addrspacecast{{[^@]+}} @foo
 int test1() { return foo; }
 
 // COM-LABEL: define i32 @test2(i32 %i)
@@ -30,13 +30,13 @@
 int test2(int i) { return ban[i]; }
 
 // COM-LABEL: define void @test3()
-// PIZ: load i32 addrspace(4)*, i32 addrspace(4)* addrspace(4)* @B
+// PIZ: load i32 addrspace(4)*, i32 addrspace(4)* addrspace(4)* addrspacecast{{[^@]+}} @B
 // PIZ: load i32, i32 addrspace(4)*
-// PIZ: load i32 addrspace(4)*, i32 addrspace(4)* addrspace(4)* @A
+// PIZ: load i32 addrspace(4)*, i32 addrspace(4)* addrspace(4)* addrspacecast{{[^@]+}} @A
 // PIZ: store i32 {{.*}}, i32 addrspace(4)*
-// CHECK: load i32*, i32** @B
+// CHECK: load i32*, i32** addrspacecast{{.*}} @B
 // CHECK: load i32, i32*
-// CHECK: load i32*, i32** @A
+// CHECK: load i32*, i32** addrspacecast{{.*}} @A
 // CHECK: store i32 {{.*}}, i32*
 void test3() {
   *A = *B;
@@ -50,7 +50,7 @@
 // PIZ: %[[arrayidx:.*]] = getelementptr inbounds i32, i32 addrspace(4)* %[[r0]]
 // PIZ: store i32 0, i32 addrspace(4)* %[[arrayidx]]
 // CHECK-LABEL: define void @test4(i32* %a)
-// CHECK: %[[alloca:.*]] = alloca i32*, align 4, addrspace(5)
+// CHECK: %[[alloca:.*]] = alloca i32*, align 8, addrspace(5)
 // CHECK: %[[a_addr:.*]] = addrspacecast{{.*}} %[[alloca]] to i32**
 // CHECK: store i32* %a, i32** %[[a_addr]]
 // CHECK: %[[r0:.*]] = load i32*, i32** %[[a_addr]]
Index: test/CodeGen/address-space.c
===================================================================
--- test/CodeGen/address-space.c
+++ test/CodeGen/address-space.c
@@ -24,11 +24,13 @@
 __attribute__((address_space(2))) int *A, *B;
 
 // CHECK-LABEL: define void @test3()
-// GIZ: load i32 addrspace(2)*, i32 addrspace(2)** @B
-// PIZ: load i32 addrspace(2)*, i32 addrspace(2)* addrspace(4)* @B
+// X86: load i32 addrspace(2)*, i32 addrspace(2)** @B
+// AMDGIZ: load i32 addrspace(2)*, i32 addrspace(2)** addrspacecast (i32 addrspace(2)* addrspace(1)* @B to i32 addrspace(2)**)
+// PIZ: load i32 addrspace(2)*, i32 addrspace(2)* addrspace(4)* addrspacecast (i32 addrspace(2)* addrspace(1)* @B to i32 addrspace(2)* addrspace(4)*)
 // CHECK: load i32, i32 addrspace(2)*
-// GIZ: load i32 addrspace(2)*, i32 addrspace(2)** @A
-// PIZ: load i32 addrspace(2)*, i32 addrspace(2)* addrspace(4)* @A
+// X86: load i32 addrspace(2)*, i32 addrspace(2)** @A
+// AMDGIZ: load i32 addrspace(2)*, i32 addrspace(2)** addrspacecast (i32 addrspace(2)* addrspace(1)* @A to i32 addrspace(2)**)
+// PIZ: load i32 addrspace(2)*, i32 addrspace(2)* addrspace(4)* addrspacecast (i32 addrspace(2)* addrspace(1)* @A to i32 addrspace(2)* addrspace(4)*)
 // CHECK: store i32 {{.*}}, i32 addrspace(2)*
 void test3() {
   *A = *B;
Index: lib/CodeGen/TargetInfo.cpp
===================================================================
--- lib/CodeGen/TargetInfo.cpp
+++ lib/CodeGen/TargetInfo.cpp
@@ -7363,7 +7363,8 @@
       F->addFnAttr("amdgpu-num-vgpr", llvm::utostr(NumVGPR));
   }
 
-  appendOpenCLVersionMD(M);
+  if (M.getLangOpts().OpenCL)
+    appendOpenCLVersionMD(M);
 }
 
 unsigned AMDGPUTargetCodeGenInfo::getOpenCLKernelCallingConv() const {
Index: lib/CodeGen/CodeGenModule.cpp
===================================================================
--- lib/CodeGen/CodeGenModule.cpp
+++ lib/CodeGen/CodeGenModule.cpp
@@ -2471,13 +2471,34 @@
 
 unsigned CodeGenModule::GetGlobalVarAddressSpace(const VarDecl *D,
                                                  unsigned AddrSpace) {
-  if (D && LangOpts.CUDA && LangOpts.CUDAIsDevice) {
-    if (D->hasAttr<CUDAConstantAttr>())
-      AddrSpace = getContext().getTargetAddressSpace(LangAS::cuda_constant);
-    else if (D->hasAttr<CUDASharedAttr>())
-      AddrSpace = getContext().getTargetAddressSpace(LangAS::cuda_shared);
-    else
-      AddrSpace = getContext().getTargetAddressSpace(LangAS::cuda_device);
+  if (D) {
+    if (LangOpts.CUDA && LangOpts.CUDAIsDevice) {
+      if (D->hasAttr<CUDAConstantAttr>())
+        AddrSpace = getContext().getTargetAddressSpace(LangAS::cuda_constant);
+      else if (D->hasAttr<CUDASharedAttr>())
+        AddrSpace = getContext().getTargetAddressSpace(LangAS::cuda_shared);
+      else
+        AddrSpace = getContext().getTargetAddressSpace(LangAS::cuda_device);
+    } else if (getTriple().getArch() == llvm::Triple::amdgcn) {
+      auto LangAddr = D->getType().getAddressSpace();
+      if (LangOpts.OpenCL) {
+        assert(LangAddr == LangAS::opencl_global ||
+               LangAddr == LangAS::opencl_constant ||
+               LangAddr == LangAS::opencl_local ||
+               LangAddr >= LangAS::FirstTargetAddressSpace);
+      } else {
+        assert(LangAddr == LangAS::Default ||
+               LangAddr >= LangAS::FirstTargetAddressSpace);
+      }
+      if (!LangOpts.OpenCL && LangAddr == LangAS::Default) {
+        if (isTypeConstant(D->getType(), false)) {
+          LangAddr = LangAS::opencl_constant;
+        } else {
+          LangAddr = LangAS::opencl_global;
+        }
+        AddrSpace = getContext().getTargetAddressSpace(LangAddr);
+      }
+    }
   }
 
   return AddrSpace;
Index: lib/CodeGen/CGExpr.cpp
===================================================================
--- lib/CodeGen/CGExpr.cpp
+++ lib/CodeGen/CGExpr.cpp
@@ -353,9 +353,15 @@
         (Ty->isArrayType() || Ty->isRecordType()) &&
         CGF.CGM.isTypeConstant(Ty, true))
       if (llvm::Constant *Init = CGF.CGM.EmitConstantExpr(Inner, Ty, &CGF)) {
+        unsigned AddrSpace = 0;
+        if (CGF.CGM.getTriple().getArch() == llvm::Triple::amdgcn) {
+          AddrSpace =
+              CGF.getContext().getTargetAddressSpace(LangAS::opencl_constant);
+        }
         auto *GV = new llvm::GlobalVariable(
             CGF.CGM.getModule(), Init->getType(), /*isConstant=*/true,
-            llvm::GlobalValue::PrivateLinkage, Init, ".ref.tmp");
+            llvm::GlobalValue::PrivateLinkage, Init, ".ref.tmp", nullptr,
+            llvm::GlobalValue::NotThreadLocal, AddrSpace);
         CharUnits alignment = CGF.getContext().getTypeAlignInChars(Ty);
         GV->setAlignment(alignment.getQuantity());
         // FIXME: Should we put the new global into a COMDAT?
@@ -441,8 +447,8 @@
   // Create and initialize the reference temporary.
   Address Object = createReferenceTemporary(*this, M, E);
   if (auto *Var = dyn_cast<llvm::GlobalVariable>(Object.getPointer())) {
-    Object = Address(llvm::ConstantExpr::getBitCast(
-        Var, ConvertTypeForMem(E->getType())->getPointerTo()),
+    Object = Address(llvm::ConstantExpr::getPointerCast(
+                         Var, ConvertTypeForMem(E->getType())->getPointerTo()),
                      Object.getAlignment());
     // If the temporary is a global and has a constant initializer or is a
     // constant temporary that we promoted to a global, we may have already
Index: lib/Basic/Targets.cpp
===================================================================
--- lib/Basic/Targets.cpp
+++ lib/Basic/Targets.cpp
@@ -2170,6 +2170,13 @@
     assert(DataLayout->getAllocaAddrSpace() == AS.Private);
 
     UseAddrSpaceMapMangling = true;
+
+    if (getMaxPointerWidth() == 64) {
+      LongWidth = LongAlign = 64;
+      SizeType = UnsignedLong;
+      PtrDiffType = SignedLong;
+      IntPtrType = SignedLong;
+    }
   }
 
   void adjust(LangOptions &Opts) override {
@@ -2181,6 +2188,9 @@
       AddrSpaceMap = Opts.OpenCL ? &AMDGPUOpenCLPrivateIsZeroMap
                                  : &AMDGPUNonOpenCLPrivateIsZeroMap;
     }
+    // Set default pointer width and alignment.
+    PointerWidth = getPointerWidthV(Opts.OpenCL ? AS.Private : AS.Generic);
+    PointerAlign = PointerWidth;
   }
 
   uint64_t getPointerWidthV(unsigned AddrSpace) const override {
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