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[OpenCL] Setting constant address space for array initializers 

Summary: Setting constant address space for global constants used for memcpy-initialization of arrays.

Patch by Alexey Sotkin.

Reviewers: bader, yaxunl, Anastasia

Subscribers: cfe-commits, AlexeySotkin

Differential Revision: https://reviews.llvm.org/D25305

llvm-svn: 285557
This commit is contained in:
Alexey Bader 2016-10-31 10:26:31 +00:00
parent 56c85d2119
commit abdcfc1809
3 changed files with 18 additions and 3 deletions
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8
clang/lib/CodeGen/CGDecl.cpp
View File

@ -1225,10 +1225,16 @@ void CodeGenFunction::EmitAutoVarInit(const AutoVarEmission &emission) {
// Otherwise, create a temporary global with the initializer then
// memcpy from the global to the alloca.
std::string Name = getStaticDeclName(CGM, D);
unsigned AS = 0;
if (getLangOpts().OpenCL) {
AS = CGM.getContext().getTargetAddressSpace(LangAS::opencl_constant);
BP = llvm::PointerType::getInt8PtrTy(getLLVMContext(), AS);
}
llvm::GlobalVariable *GV =
new llvm::GlobalVariable(CGM.getModule(), constant->getType(), true,
llvm::GlobalValue::PrivateLinkage,
constant, Name);
constant, Name, nullptr,
llvm::GlobalValue::NotThreadLocal, AS);
GV->setAlignment(Loc.getAlignment().getQuantity());
GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);

4
clang/test/CodeGenOpenCL/partial_initializer.cl
View File

@ -24,7 +24,7 @@ int4 GV1 = (int4)((int2)(1,2),3,4);
// CHECK: @GV2 = addrspace(1) global <4 x i32> <i32 1, i32 1, i32 1, i32 1>, align 16
int4 GV2 = (int4)(1);
// CHECK: @f.S = private unnamed_addr constant %struct.StrucTy { i32 1, i32 2, i32 0 }, align 4
// CHECK: @f.S = private unnamed_addr addrspace(2) constant %struct.StrucTy { i32 1, i32 2, i32 0 }, align 4
// CHECK-LABEL: define spir_func void @f()
void f(void) {
@ -46,7 +46,7 @@ void f(void) {
float A[6][6] = {1.0f, 2.0f};
// CHECK: %[[v5:.*]] = bitcast %struct.StrucTy* %S to i8*
// CHECK: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[v5]], i8* bitcast (%struct.StrucTy* @f.S to i8*), i32 12, i32 4, i1 false)
// CHECK: call void @llvm.memcpy.p0i8.p2i8.i32(i8* %[[v5]], i8 addrspace(2)* bitcast (%struct.StrucTy addrspace(2)* @f.S to i8 addrspace(2)*), i32 12, i32 4, i1 false)
StrucTy S = {1, 2};
// CHECK: store <2 x i32> <i32 1, i32 2>, <2 x i32>* %[[compoundliteral1]], align 8

9
clang/test/CodeGenOpenCL/private-array-initialization.cl Normal file
View File

@ -0,0 +1,9 @@
// RUN: %clang_cc1 %s -triple spir-unknown-unknown -O0 -emit-llvm -o - | FileCheck %s
// CHECK: @test.arr = private unnamed_addr addrspace(2) constant [3 x i32] [i32 1, i32 2, i32 3], align 4
void test() {
__private int arr[] = {1, 2, 3};
// CHECK: %[[arr_i8_ptr:[0-9]+]] = bitcast [3 x i32]* %arr to i8*
// CHECK: call void @llvm.memcpy.p0i8.p2i8.i32(i8* %[[arr_i8_ptr]], i8 addrspace(2)* bitcast ([3 x i32] addrspace(2)* @test.arr to i8 addrspace(2)*), i32 12, i32 4, i1 false)
}