commit 84744c152ad6fe6e7e0b267302b5abc4d5438d3e
author Yaxun Liu <Yaxun.Liu@amd.com> Mon Jun 19 17:03:41 2017 +0000
committer Yaxun Liu <Yaxun.Liu@amd.com> Mon Jun 19 17:03:41 2017 +0000
tree 56ccc98c39c27e05c7c1310f8ea9ce1a54329516
parent f6dbefe1b1874abec49a8b7bc5e0817181e7fb88

CodeGen: Cast temporary variable to proper address space

In C++ all variables are in default address space. Previously change has been
made to cast automatic variables to default address space. However that is
not sufficient since all temporary variables need to be casted to default
address space.

This patch casts all temporary variables to default address space except those
for passing indirect arguments since they are only used for load/store.

This patch only affects target having non-zero alloca address space.

Differential Revision: https://reviews.llvm.org/D33706

llvm-svn: 305711

clang/test/CodeGenCXX/amdgcn-automatic-variable.cpp

diff --git a/clang/test/CodeGenCXX/amdgcn-automatic-variable.cpp b/clang/test/CodeGenCXX/amdgcn-automatic-variable.cpp
index aab7207..7df27c2 100644
--- a/clang/test/CodeGenCXX/amdgcn-automatic-variable.cpp
+++ b/clang/test/CodeGenCXX/amdgcn-automatic-variable.cpp
@@ -3,9 +3,10 @@
 // CHECK-LABEL: define void @_Z5func1Pi(i32* %x)
 void func1(int *x) {
   // CHECK: %[[x_addr:.*]] = alloca i32*{{.*}}addrspace(5)
-  // CHECK: store i32* %x, i32* addrspace(5)* %[[x_addr]]
-  // CHECK: %[[r0:.*]] = load i32*, i32* addrspace(5)* %[[x_addr]]
-  // CHECK: store i32 1, i32* %[[r0]]
+  // CHECK: %[[r0:.*]] = addrspacecast i32* addrspace(5)* %[[x_addr]] to i32**
+  // CHECK: store i32* %x, i32** %[[r0]]
+  // CHECK: %[[r1:.*]] = load i32*, i32** %[[r0]]
+  // CHECK: store i32 1, i32* %[[r1]]
   *x = 1;
 }
 
@@ -70,3 +71,12 @@
   // CHECK: call void @_ZN1AD1Ev(%class.A* %[[r0]])
   A a;
 }
+
+// CHECK-LABEL: define void @_Z5func4i
+void func4(int x) {
+  // CHECK: %[[x_addr:.*]] = alloca i32, align 4, addrspace(5)
+  // CHECK: %[[r0:.*]] = addrspacecast i32 addrspace(5)* %[[x_addr]] to i32*
+  // CHECK: store i32 %x, i32* %[[r0]], align 4
+  // CHECK: call void @_Z5func1Pi(i32* %[[r0]])
+  func1(&x);
+}