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[SYCL] Put constant initializer list data in non-generic addr space. #3005

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Merged
merged 4 commits into from
Jan 13, 2021
Merged

[SYCL] Put constant initializer list data in non-generic addr space. #3005

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979f66c
[SYCL] Put constant initializer list data in non-generic addr space.
kbobrovs Jan 9, 2021
d739cc6
Fix clang formatting.
kbobrovs Jan 12, 2021
438cb53
Removed redundant code from the test per review.
kbobrovs Jan 13, 2021
30eb47f
added missing colon to the test per code review
kbobrovs Jan 13, 2021
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6 changes: 6 additions & 0 deletions clang/lib/CodeGen/CGExprAgg.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -499,6 +499,12 @@ void AggExprEmitter::EmitArrayInit(Address DestPtr, llvm::ArrayType *AType,
CodeGen::CodeGenModule &CGM = CGF.CGM;
ConstantEmitter Emitter(CGF);
LangAS AS = ArrayQTy.getAddressSpace();
if (CGM.getLangOpts().SYCLIsDevice && AS == LangAS::Default) {
// SYCL's default AS is 'generic', which can't be used to define constant
// initializer data in. It is reasonable to keep it in the same AS
// as string literals.
AS = CGM.getStringLiteralAddressSpace();
}
if (llvm::Constant *C = Emitter.tryEmitForInitializer(E, AS, ArrayQTy)) {
auto GV = new llvm::GlobalVariable(
CGM.getModule(), C->getType(),
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30 changes: 30 additions & 0 deletions clang/test/CodeGenSYCL/local_var_big_init_as.cpp
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@@ -0,0 +1,30 @@
// RUN: %clang_cc1 -fsycl -fsycl-is-device -triple spir64-unknown-unknown-sycldevice \
// RUN: -emit-llvm -o - %s | FileCheck %s

// This test checks that data for big constant initializer lists is placed
// into the global address space by the SYCL compiler.

struct Test {
Test() : set{
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15} {};
int set[32];
};
// CHECK-DAG: @constinit = private unnamed_addr addrspace(1) constant
// CHECK: [32 x i32]
// CHECK: [i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7,
// CHECK: i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15,
// CHECK: i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7,
// CHECK: i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15
// CHECK: ], align 4
// CHECK-NOT: @constinit = private unnamed_addr addrspace(0)
// CHECK-NOT: @constinit = private unnamed_addr addrspace(2)
// CHECK-NOT: @constinit = private unnamed_addr addrspace(3)
// CHECK-NOT: @constinit = private unnamed_addr addrspace(4)

__attribute__((sycl_device)) void bar(Test &x);

__attribute__((sycl_device)) void zoo() {
Test mc;
bar(mc);
}