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llvm-project/clang/test/CodeGenSYCL/address-space-deduction.cpp
schittir fdfcebb38d
[clang][SYCL] Add sycl_external attribute and restrict emitting device code (#140282) 
This patch is part of the upstreaming effort for supporting SYCL
language front end.
It makes the following changes:
1. Adds sycl_external attribute for functions with external linkage,
which is intended for use to implement the SYCL_EXTERNAL macro as
specified by the SYCL 2020 specification
2. Adds checks to avoid emitting device code when sycl_external and
sycl_kernel_entry_point attributes are not enabled
3. Fixes test failures caused by the above changes

This patch is missing diagnostics for the following diagnostics listed
in the SYCL 2020 specification's section 5.10.1, which will be addressed
in a subsequent PR:
Functions that are declared using SYCL_EXTERNAL have the following
additional restrictions beyond those imposed on other device functions:
1. If the SYCL backend does not support the generic address space then
the function cannot use raw pointers as parameter or return types.
Explicit pointer classes must be used instead;
2. The function cannot call group::parallel_for_work_item;
3. The function cannot be called from a parallel_for_work_group scope.

In addition to that, the subsequent PR will also implement diagnostics
for inline functions including virtual functions defined as inline.

---------

Co-authored-by: Mariya Podchishchaeva <mariya.podchishchaeva@intel.com>
2025-08-20 12:37:37 -04:00

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// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
// RUN: %clang_cc1 -triple spir64 -fsycl-is-device -disable-llvm-passes -emit-llvm %s -o - | FileCheck %s
// CHECK-LABEL: @_Z4testv(
// CHECK-NEXT: entry:
// CHECK-NEXT: [[I:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[PPTR:%.*]] = alloca ptr addrspace(4), align 8
// CHECK-NEXT: [[IS_I_PTR:%.*]] = alloca i8, align 1
// CHECK-NEXT: [[VAR23:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[CP:%.*]] = alloca ptr addrspace(4), align 8
// CHECK-NEXT: [[ARR:%.*]] = alloca [42 x i32], align 4
// CHECK-NEXT: [[CPP:%.*]] = alloca ptr addrspace(4), align 8
// CHECK-NEXT: [[APTR:%.*]] = alloca ptr addrspace(4), align 8
// CHECK-NEXT: [[STR:%.*]] = alloca ptr addrspace(4), align 8
// CHECK-NEXT: [[PHI_STR:%.*]] = alloca ptr addrspace(4), align 8
// CHECK-NEXT: [[SELECT_NULL:%.*]] = alloca ptr addrspace(4), align 8
// CHECK-NEXT: [[SELECT_STR_TRIVIAL1:%.*]] = alloca ptr addrspace(4), align 8
// CHECK-NEXT: [[SELECT_STR_TRIVIAL2:%.*]] = alloca ptr addrspace(4), align 8
// CHECK-NEXT: [[I_ASCAST:%.*]] = addrspacecast ptr [[I]] to ptr addrspace(4)
// CHECK-NEXT: [[PPTR_ASCAST:%.*]] = addrspacecast ptr [[PPTR]] to ptr addrspace(4)
// CHECK-NEXT: [[IS_I_PTR_ASCAST:%.*]] = addrspacecast ptr [[IS_I_PTR]] to ptr addrspace(4)
// CHECK-NEXT: [[VAR23_ASCAST:%.*]] = addrspacecast ptr [[VAR23]] to ptr addrspace(4)
// CHECK-NEXT: [[CP_ASCAST:%.*]] = addrspacecast ptr [[CP]] to ptr addrspace(4)
// CHECK-NEXT: [[ARR_ASCAST:%.*]] = addrspacecast ptr [[ARR]] to ptr addrspace(4)
// CHECK-NEXT: [[CPP_ASCAST:%.*]] = addrspacecast ptr [[CPP]] to ptr addrspace(4)
// CHECK-NEXT: [[APTR_ASCAST:%.*]] = addrspacecast ptr [[APTR]] to ptr addrspace(4)
// CHECK-NEXT: [[STR_ASCAST:%.*]] = addrspacecast ptr [[STR]] to ptr addrspace(4)
// CHECK-NEXT: [[PHI_STR_ASCAST:%.*]] = addrspacecast ptr [[PHI_STR]] to ptr addrspace(4)
// CHECK-NEXT: [[SELECT_NULL_ASCAST:%.*]] = addrspacecast ptr [[SELECT_NULL]] to ptr addrspace(4)
// CHECK-NEXT: [[SELECT_STR_TRIVIAL1_ASCAST:%.*]] = addrspacecast ptr [[SELECT_STR_TRIVIAL1]] to ptr addrspace(4)
// CHECK-NEXT: [[SELECT_STR_TRIVIAL2_ASCAST:%.*]] = addrspacecast ptr [[SELECT_STR_TRIVIAL2]] to ptr addrspace(4)
// CHECK-NEXT: store i32 0, ptr addrspace(4) [[I_ASCAST]], align 4
// CHECK-NEXT: store ptr addrspace(4) [[I_ASCAST]], ptr addrspace(4) [[PPTR_ASCAST]], align 8
// CHECK-NEXT: [[TMP0:%.*]] = load ptr addrspace(4), ptr addrspace(4) [[PPTR_ASCAST]], align 8
// CHECK-NEXT: [[CMP:%.*]] = icmp eq ptr addrspace(4) [[TMP0]], [[I_ASCAST]]
// CHECK-NEXT: [[STOREDV:%.*]] = zext i1 [[CMP]] to i8
// CHECK-NEXT: store i8 [[STOREDV]], ptr addrspace(4) [[IS_I_PTR_ASCAST]], align 1
// CHECK-NEXT: [[TMP1:%.*]] = load ptr addrspace(4), ptr addrspace(4) [[PPTR_ASCAST]], align 8
// CHECK-NEXT: store i32 66, ptr addrspace(4) [[TMP1]], align 4
// CHECK-NEXT: store i32 23, ptr addrspace(4) [[VAR23_ASCAST]], align 4
// CHECK-NEXT: store ptr addrspace(4) [[VAR23_ASCAST]], ptr addrspace(4) [[CP_ASCAST]], align 8
// CHECK-NEXT: [[TMP2:%.*]] = load ptr addrspace(4), ptr addrspace(4) [[CP_ASCAST]], align 8
// CHECK-NEXT: store i8 41, ptr addrspace(4) [[TMP2]], align 1
// CHECK-NEXT: [[ARRAYDECAY:%.*]] = getelementptr inbounds [42 x i32], ptr addrspace(4) [[ARR_ASCAST]], i64 0, i64 0
// CHECK-NEXT: store ptr addrspace(4) [[ARRAYDECAY]], ptr addrspace(4) [[CPP_ASCAST]], align 8
// CHECK-NEXT: [[TMP3:%.*]] = load ptr addrspace(4), ptr addrspace(4) [[CPP_ASCAST]], align 8
// CHECK-NEXT: store i8 43, ptr addrspace(4) [[TMP3]], align 1
// CHECK-NEXT: [[ARRAYDECAY1:%.*]] = getelementptr inbounds [42 x i32], ptr addrspace(4) [[ARR_ASCAST]], i64 0, i64 0
// CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i32, ptr addrspace(4) [[ARRAYDECAY1]], i64 10
// CHECK-NEXT: store ptr addrspace(4) [[ADD_PTR]], ptr addrspace(4) [[APTR_ASCAST]], align 8
// CHECK-NEXT: [[TMP4:%.*]] = load ptr addrspace(4), ptr addrspace(4) [[APTR_ASCAST]], align 8
// CHECK-NEXT: [[ARRAYDECAY2:%.*]] = getelementptr inbounds [42 x i32], ptr addrspace(4) [[ARR_ASCAST]], i64 0, i64 0
// CHECK-NEXT: [[ADD_PTR3:%.*]] = getelementptr inbounds nuw i32, ptr addrspace(4) [[ARRAYDECAY2]], i64 168
// CHECK-NEXT: [[CMP4:%.*]] = icmp ult ptr addrspace(4) [[TMP4]], [[ADD_PTR3]]
// CHECK-NEXT: br i1 [[CMP4]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
// CHECK: if.then:
// CHECK-NEXT: [[TMP5:%.*]] = load ptr addrspace(4), ptr addrspace(4) [[APTR_ASCAST]], align 8
// CHECK-NEXT: store i32 44, ptr addrspace(4) [[TMP5]], align 4
// CHECK-NEXT: br label [[IF_END]]
// CHECK: if.end:
// CHECK-NEXT: store ptr addrspace(4) addrspacecast (ptr addrspace(1) @.str to ptr addrspace(4)), ptr addrspace(4) [[STR_ASCAST]], align 8
// CHECK-NEXT: [[TMP6:%.*]] = load ptr addrspace(4), ptr addrspace(4) [[STR_ASCAST]], align 8
// CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr addrspace(4) [[TMP6]], i64 0
// CHECK-NEXT: [[TMP7:%.*]] = load i8, ptr addrspace(4) [[ARRAYIDX]], align 1
// CHECK-NEXT: [[CONV:%.*]] = sext i8 [[TMP7]] to i32
// CHECK-NEXT: store i32 [[CONV]], ptr addrspace(4) [[I_ASCAST]], align 4
// CHECK-NEXT: [[TMP8:%.*]] = load i32, ptr addrspace(4) [[I_ASCAST]], align 4
// CHECK-NEXT: [[CMP5:%.*]] = icmp sgt i32 [[TMP8]], 2
// CHECK-NEXT: br i1 [[CMP5]], label [[COND_TRUE:%.*]], label [[COND_FALSE:%.*]]
// CHECK: cond.true:
// CHECK-NEXT: [[TMP9:%.*]] = load ptr addrspace(4), ptr addrspace(4) [[STR_ASCAST]], align 8
// CHECK-NEXT: br label [[COND_END:%.*]]
// CHECK: cond.false:
// CHECK-NEXT: br label [[COND_END]]
// CHECK: cond.end:
// CHECK-NEXT: [[COND:%.*]] = phi ptr addrspace(4) [ [[TMP9]], [[COND_TRUE]] ], [ addrspacecast (ptr addrspace(1) @.str.1 to ptr addrspace(4)), [[COND_FALSE]] ]
// CHECK-NEXT: store ptr addrspace(4) [[COND]], ptr addrspace(4) [[PHI_STR_ASCAST]], align 8
// CHECK-NEXT: [[TMP10:%.*]] = load i32, ptr addrspace(4) [[I_ASCAST]], align 4
// CHECK-NEXT: [[CMP6:%.*]] = icmp sgt i32 [[TMP10]], 2
// CHECK-NEXT: [[TMP11:%.*]] = zext i1 [[CMP6]] to i64
// CHECK-NEXT: [[COND7:%.*]] = select i1 [[CMP6]], ptr addrspace(4) addrspacecast (ptr addrspace(1) @.str.2 to ptr addrspace(4)), ptr addrspace(4) null
// CHECK-NEXT: store ptr addrspace(4) [[COND7]], ptr addrspace(4) [[SELECT_NULL_ASCAST]], align 8
// CHECK-NEXT: [[TMP12:%.*]] = load ptr addrspace(4), ptr addrspace(4) [[STR_ASCAST]], align 8
// CHECK-NEXT: store ptr addrspace(4) [[TMP12]], ptr addrspace(4) [[SELECT_STR_TRIVIAL1_ASCAST]], align 8
// CHECK-NEXT: store ptr addrspace(4) addrspacecast (ptr addrspace(1) @.str.1 to ptr addrspace(4)), ptr addrspace(4) [[SELECT_STR_TRIVIAL2_ASCAST]], align 8
// CHECK-NEXT: ret void
//
[[clang::sycl_external]] void test() {
static const int foo = 0x42;
int i = 0;
int *pptr = &i;
bool is_i_ptr = (pptr == &i);
*pptr = foo;
int var23 = 23;
char *cp = (char *)&var23;
*cp = 41;
int arr[42];
char *cpp = (char *)arr;
*cpp = 43;
int *aptr = arr + 10;
if (aptr < arr + sizeof(arr))
*aptr = 44;
const char *str = "Hello, world!";
i = str[0];
const char *phi_str = i > 2 ? str : "Another hello world!";
(void)phi_str;
const char *select_null = i > 2 ? "Yet another Hello world" : nullptr;
(void)select_null;
const char *select_str_trivial1 = true ? str : "Another hello world!";
(void)select_str_trivial1;
const char *select_str_trivial2 = false ? str : "Another hello world!";
(void)select_str_trivial2;
}
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