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[SYCL] Enable memcpy in libdevice (#3879)
Signed-off-by: gejin <[email protected]> Currently, memcpy is supported in SYCL device code if "-fno-builtin" is not added. Compiler will convert it to "llvm.memcpy..." intrinsic and llvm-spirv will convert it to OpCopyMemorySized for jit. However, if "-fno-builtin" is added, compiler will call libc function "memcpy" directly and it requires libdevice support. This PR support memcpy in libdevice, so developers can use it in SYCL device code no matter whether "-fno-builtin" is added or not.
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15 files changed

+72
-10
lines changed

15 files changed

+72
-10
lines changed

‎clang/lib/Driver/Driver.cpp‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -4251,6 +4251,7 @@ class OffloadingActionBuilder final {
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// default too.
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SmallVector<DeviceLibOptInfo, 5> sycl_device_fallback_libs = {
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{"libsycl-fallback-cassert", "libc"},
4254+
{"libsycl-fallback-cstring", "libc"},
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{"libsycl-fallback-complex", "libm-fp32"},
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{"libsycl-fallback-complex-fp64", "libm-fp64"},
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{"libsycl-fallback-cmath", "libm-fp32"},

‎clang/lib/Driver/ToolChains/SYCL.cpp‎

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Original file line numberDiff line numberDiff line change
@@ -153,6 +153,7 @@ static llvm::SmallVector<StringRef, 10> SYCLDeviceLibList{
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"complex",
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"complex-fp64",
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"fallback-cassert",
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"fallback-cstring",
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"fallback-cmath",
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"fallback-cmath-fp64",
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"fallback-complex",

‎clang/test/Driver/Inputs/SYCL-windows/lib/libsycl-fallback-cstring.obj‎

Whitespace-only changes.

‎clang/test/Driver/Inputs/SYCL/lib/libsycl-fallback-cstring.o‎

Whitespace-only changes.

‎clang/test/Driver/sycl-device-lib-win.cpp‎

Lines changed: 4 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -21,6 +21,7 @@
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// SYCL_DEVICE_LIB_UNBUNDLE_DEFAULT-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-cmath.obj" "-outputs={{.*}}libsycl-cmath-{{.*}}.o" "-unbundle"
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// SYCL_DEVICE_LIB_UNBUNDLE_DEFAULT-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-cmath-fp64.obj" "-outputs={{.*}}libsycl-cmath-fp64-{{.*}}.o" "-unbundle"
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// SYCL_DEVICE_LIB_UNBUNDLE_DEFAULT-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cassert.obj" "-outputs={{.*}}libsycl-fallback-cassert-{{.*}}.o" "-unbundle"
24+
// SYCL_DEVICE_LIB_UNBUNDLE_DEFAULT-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cstring.obj" "-outputs={{.*}}libsycl-fallback-cstring-{{.*}}.o" "-unbundle"
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// SYCL_DEVICE_LIB_UNBUNDLE_DEFAULT-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-complex.obj" "-outputs={{.*}}libsycl-fallback-complex-{{.*}}.o" "-unbundle"
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// SYCL_DEVICE_LIB_UNBUNDLE_DEFAULT-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-complex-fp64.obj" "-outputs={{.*}}libsycl-fallback-complex-fp64-{{.*}}.o" "-unbundle"
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// SYCL_DEVICE_LIB_UNBUNDLE_DEFAULT-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cmath.obj" "-outputs={{.*}}libsycl-fallback-cmath-{{.*}}.o" "-unbundle"
@@ -44,6 +45,7 @@
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// SYCL_DEVICE_LIB_UNBUNDLE_WITH_FP64-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-cmath.obj" "-outputs={{.*}}libsycl-cmath-{{.*}}.o" "-unbundle"
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// SYCL_DEVICE_LIB_UNBUNDLE_WITH_FP64-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-cmath-fp64.obj" "-outputs={{.*}}libsycl-cmath-fp64-{{.*}}.o" "-unbundle"
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// SYCL_DEVICE_LIB_UNBUNDLE_WITH_FP64-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cassert.obj" "-outputs={{.*}}libsycl-fallback-cassert-{{.*}}.o" "-unbundle"
48+
// SYCL_DEVICE_LIB_UNBUNDLE_WITH_FP64-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cstring.obj" "-outputs={{.*}}libsycl-fallback-cstring-{{.*}}.o" "-unbundle"
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// SYCL_DEVICE_LIB_UNBUNDLE_WITH_FP64-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-complex.obj" "-outputs={{.*}}libsycl-fallback-complex-{{.*}}.o" "-unbundle"
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// SYCL_DEVICE_LIB_UNBUNDLE_WITH_FP64-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-complex-fp64.obj" "-outputs={{.*}}libsycl-fallback-complex-fp64-{{.*}}.o" "-unbundle"
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// SYCL_DEVICE_LIB_UNBUNDLE_WITH_FP64-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cmath.obj" "-outputs={{.*}}libsycl-fallback-cmath-{{.*}}.o" "-unbundle"
@@ -69,7 +71,7 @@
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// RUN: | FileCheck %s -check-prefix=SYCL_DEVICE_LIB_UNBUNDLE_NO_LIBM
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// SYCL_DEVICE_LIB_UNBUNDLE_NO_LIBM: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-crt.obj" "-outputs={{.*}}libsycl-crt-{{.*}}.o" "-unbundle"
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// SYCL_DEVICE_LIB_UNBUNDLE_NO_LIBM-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cassert.obj" "-outputs={{.*}}libsycl-fallback-cassert-{{.*}}.o" "-unbundle"
72-
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// SYCL_DEVICE_LIB_UNBUNDLE_NO_LIBM-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cstring.obj" "-outputs={{.*}}libsycl-fallback-cstring-{{.*}}.o" "-unbundle"
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/// ###########################################################################
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/// test behavior of disabling all device libraries
@@ -109,6 +111,7 @@
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// SYCL_LLVM_LINK_DEVICE_LIB-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-cmath.obj" "-outputs={{.*}}libsycl-cmath-{{.*}}.o" "-unbundle"
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// SYCL_LLVM_LINK_DEVICE_LIB-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-cmath-fp64.obj" "-outputs={{.*}}libsycl-cmath-fp64-{{.*}}.o" "-unbundle"
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// SYCL_LLVM_LINK_DEVICE_LIB-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cassert.obj" "-outputs={{.*}}libsycl-fallback-cassert-{{.*}}.o" "-unbundle"
114+
// SYCL_LLVM_LINK_DEVICE_LIB-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cstring.obj" "-outputs={{.*}}libsycl-fallback-cstring-{{.*}}.o" "-unbundle"
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// SYCL_LLVM_LINK_DEVICE_LIB-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-complex.obj" "-outputs={{.*}}libsycl-fallback-complex-{{.*}}.o" "-unbundle"
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// SYCL_LLVM_LINK_DEVICE_LIB-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-complex-fp64.obj" "-outputs={{.*}}libsycl-fallback-complex-fp64-{{.*}}.o" "-unbundle"
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// SYCL_LLVM_LINK_DEVICE_LIB-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cmath.obj" "-outputs={{.*}}libsycl-fallback-cmath-{{.*}}.o" "-unbundle"

‎clang/test/Driver/sycl-device-lib.cpp‎

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@@ -21,6 +21,7 @@
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// SYCL_DEVICE_LIB_UNBUNDLE_DEFAULT-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-cmath.o" "-outputs={{.*}}libsycl-cmath-{{.*}}.o" "-unbundle"
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// SYCL_DEVICE_LIB_UNBUNDLE_DEFAULT-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-cmath-fp64.o" "-outputs={{.*}}libsycl-cmath-fp64-{{.*}}.o" "-unbundle"
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// SYCL_DEVICE_LIB_UNBUNDLE_DEFAULT-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cassert.o" "-outputs={{.*}}libsycl-fallback-cassert-{{.*}}.o" "-unbundle"
24+
// SYCL_DEVICE_LIB_UNBUNDLE_DEFAULT-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cstring.o" "-outputs={{.*}}libsycl-fallback-cstring-{{.*}}.o" "-unbundle"
2425
// SYCL_DEVICE_LIB_UNBUNDLE_DEFAULT-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-complex.o" "-outputs={{.*}}libsycl-fallback-complex-{{.*}}.o" "-unbundle"
2526
// SYCL_DEVICE_LIB_UNBUNDLE_DEFAULT-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-complex-fp64.o" "-outputs={{.*}}libsycl-fallback-complex-fp64-{{.*}}.o" "-unbundle"
2627
// SYCL_DEVICE_LIB_UNBUNDLE_DEFAULT-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cmath.o" "-outputs={{.*}}libsycl-fallback-cmath-{{.*}}.o" "-unbundle"
@@ -44,6 +45,7 @@
4445
// SYCL_DEVICE_LIB_UNBUNDLE_WITH_FP64-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-cmath.o" "-outputs={{.*}}libsycl-cmath-{{.*}}.o" "-unbundle"
4546
// SYCL_DEVICE_LIB_UNBUNDLE_WITH_FP64-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-cmath-fp64.o" "-outputs={{.*}}libsycl-cmath-fp64-{{.*}}.o" "-unbundle"
4647
// SYCL_DEVICE_LIB_UNBUNDLE_WITH_FP64-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cassert.o" "-outputs={{.*}}libsycl-fallback-cassert-{{.*}}.o" "-unbundle"
48+
// SYCL_DEVICE_LIB_UNBUNDLE_WITH_FP64-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cstring.o" "-outputs={{.*}}libsycl-fallback-cstring-{{.*}}.o" "-unbundle"
4749
// SYCL_DEVICE_LIB_UNBUNDLE_WITH_FP64-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-complex.o" "-outputs={{.*}}libsycl-fallback-complex-{{.*}}.o" "-unbundle"
4850
// SYCL_DEVICE_LIB_UNBUNDLE_WITH_FP64-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-complex-fp64.o" "-outputs={{.*}}libsycl-fallback-complex-fp64-{{.*}}.o" "-unbundle"
4951
// SYCL_DEVICE_LIB_UNBUNDLE_WITH_FP64-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cmath.o" "-outputs={{.*}}libsycl-fallback-cmath-{{.*}}.o" "-unbundle"
@@ -69,6 +71,7 @@
6971
// RUN: | FileCheck %s -check-prefix=SYCL_DEVICE_LIB_UNBUNDLE_NO_LIBM
7072
// SYCL_DEVICE_LIB_UNBUNDLE_NO_LIBM: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-crt.o" "-outputs={{.*}}libsycl-crt-{{.*}}.o" "-unbundle"
7173
// SYCL_DEVICE_LIB_UNBUNDLE_NO_LIBM-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cassert.o" "-outputs={{.*}}libsycl-fallback-cassert-{{.*}}.o" "-unbundle"
74+
// SYCL_DEVICE_LIB_UNBUNDLE_NO_LIBM-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cstring.o" "-outputs={{.*}}libsycl-fallback-cstring-{{.*}}.o" "-unbundle"
7275

7376
/// ###########################################################################
7477

@@ -109,6 +112,7 @@
109112
// SYCL_LLVM_LINK_DEVICE_LIB-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-cmath.o" "-outputs={{.*}}libsycl-cmath-{{.*}}.o" "-unbundle"
110113
// SYCL_LLVM_LINK_DEVICE_LIB-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-cmath-fp64.o" "-outputs={{.*}}libsycl-cmath-fp64-{{.*}}.o" "-unbundle"
111114
// SYCL_LLVM_LINK_DEVICE_LIB-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cassert.o" "-outputs={{.*}}libsycl-fallback-cassert-{{.*}}.o" "-unbundle"
115+
// SYCL_LLVM_LINK_DEVICE_LIB-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cstring.o" "-outputs={{.*}}libsycl-fallback-cstring-{{.*}}.o" "-unbundle"
112116
// SYCL_LLVM_LINK_DEVICE_LIB-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-complex.o" "-outputs={{.*}}libsycl-fallback-complex-{{.*}}.o" "-unbundle"
113117
// SYCL_LLVM_LINK_DEVICE_LIB-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-complex-fp64.o" "-outputs={{.*}}libsycl-fallback-complex-fp64-{{.*}}.o" "-unbundle"
114118
// SYCL_LLVM_LINK_DEVICE_LIB-NEXT: clang-offload-bundler{{.*}} "-type=o" "-targets=sycl-spir64-unknown-unknown-sycldevice" "-inputs={{.*}}libsycl-fallback-cmath.o" "-outputs={{.*}}libsycl-fallback-cmath-{{.*}}.o" "-unbundle"

‎libdevice/cmake/modules/SYCLLibdevice.cmake‎

Lines changed: 27 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -78,14 +78,23 @@ add_custom_command(OUTPUT ${devicelib-obj-cmath-fp64}
7878
VERBATIM)
7979

8080
add_custom_command(OUTPUT ${spv_binary_dir}/libsycl-fallback-cassert.spv
81-
COMMAND ${clang} -S -fsycl-device-only -fno-sycl-use-bitcode
81+
COMMAND ${clang} -fsycl-device-only -fno-sycl-use-bitcode
8282
${compile_opts}
8383
${CMAKE_CURRENT_SOURCE_DIR}/fallback-cassert.cpp
8484
-o ${spv_binary_dir}/libsycl-fallback-cassert.spv
8585
MAIN_DEPENDENCY fallback-cassert.cpp
8686
DEPENDS wrapper.h device.h clang spirv_vars.h llvm-spirv
8787
VERBATIM)
8888

89+
add_custom_command(OUTPUT ${spv_binary_dir}/libsycl-fallback-cstring.spv
90+
COMMAND ${clang} -fsycl-device-only -fno-sycl-use-bitcode
91+
${compile_opts}
92+
${CMAKE_CURRENT_SOURCE_DIR}/fallback-cstring.cpp
93+
-o ${spv_binary_dir}/libsycl-fallback-cstring.spv
94+
MAIN_DEPENDENCY fallback-cstring.cpp
95+
DEPENDS wrapper.h device.h clang spirv_vars.h llvm-spirv
96+
VERBATIM)
97+
8998
add_custom_command(OUTPUT ${obj_binary_dir}/libsycl-fallback-cassert.${lib-suffix}
9099
COMMAND ${clang} -fsycl -c
91100
${compile_opts} ${sycl_targets_opt}
@@ -95,8 +104,17 @@ add_custom_command(OUTPUT ${obj_binary_dir}/libsycl-fallback-cassert.${lib-suffi
95104
DEPENDS wrapper.h device.h clang spirv_vars.h clang-offload-bundler
96105
VERBATIM)
97106

107+
add_custom_command(OUTPUT ${obj_binary_dir}/libsycl-fallback-cstring.${lib-suffix}
108+
COMMAND ${clang} -fsycl -c
109+
${compile_opts} ${sycl_targets_opt}
110+
${CMAKE_CURRENT_SOURCE_DIR}/fallback-cstring.cpp
111+
-o ${obj_binary_dir}/libsycl-fallback-cstring.${lib-suffix}
112+
MAIN_DEPENDENCY fallback-cstring.cpp
113+
DEPENDS wrapper.h device.h clang spirv_vars.h clang-offload-bundler
114+
VERBATIM)
115+
98116
add_custom_command(OUTPUT ${spv_binary_dir}/libsycl-fallback-complex.spv
99-
COMMAND ${clang} -S -fsycl-device-only -fno-sycl-use-bitcode
117+
COMMAND ${clang} -fsycl-device-only -fno-sycl-use-bitcode
100118
${compile_opts}
101119
${CMAKE_CURRENT_SOURCE_DIR}/fallback-complex.cpp
102120
-o ${spv_binary_dir}/libsycl-fallback-complex.spv
@@ -114,7 +132,7 @@ add_custom_command(OUTPUT ${obj_binary_dir}/libsycl-fallback-complex.${lib-suffi
114132
VERBATIM)
115133

116134
add_custom_command(OUTPUT ${spv_binary_dir}/libsycl-fallback-complex-fp64.spv
117-
COMMAND ${clang} -S -fsycl-device-only -fno-sycl-use-bitcode
135+
COMMAND ${clang} -fsycl-device-only -fno-sycl-use-bitcode
118136
${compile_opts}
119137
${CMAKE_CURRENT_SOURCE_DIR}/fallback-complex-fp64.cpp
120138
-o ${spv_binary_dir}/libsycl-fallback-complex-fp64.spv
@@ -132,7 +150,7 @@ add_custom_command(OUTPUT ${obj_binary_dir}/libsycl-fallback-complex-fp64.${lib-
132150
VERBATIM)
133151

134152
add_custom_command(OUTPUT ${spv_binary_dir}/libsycl-fallback-cmath.spv
135-
COMMAND ${clang} -S -fsycl-device-only -fno-sycl-use-bitcode
153+
COMMAND ${clang} -fsycl-device-only -fno-sycl-use-bitcode
136154
${compile_opts}
137155
${CMAKE_CURRENT_SOURCE_DIR}/fallback-cmath.cpp
138156
-o ${spv_binary_dir}/libsycl-fallback-cmath.spv
@@ -150,7 +168,7 @@ add_custom_command(OUTPUT ${obj_binary_dir}/libsycl-fallback-cmath.${lib-suffix}
150168
VERBATIM)
151169

152170
add_custom_command(OUTPUT ${spv_binary_dir}/libsycl-fallback-cmath-fp64.spv
153-
COMMAND ${clang} -S -fsycl-device-only -fno-sycl-use-bitcode
171+
COMMAND ${clang} -fsycl-device-only -fno-sycl-use-bitcode
154172
${compile_opts}
155173
${CMAKE_CURRENT_SOURCE_DIR}/fallback-cmath-fp64.cpp
156174
-o ${spv_binary_dir}/libsycl-fallback-cmath-fp64.spv
@@ -210,13 +228,15 @@ add_custom_target(libsycldevice-obj DEPENDS
210228
)
211229
add_custom_target(libsycldevice-spv DEPENDS
212230
${spv_binary_dir}/libsycl-fallback-cassert.spv
231+
${spv_binary_dir}/libsycl-fallback-cstring.spv
213232
${spv_binary_dir}/libsycl-fallback-complex.spv
214233
${spv_binary_dir}/libsycl-fallback-complex-fp64.spv
215234
${spv_binary_dir}/libsycl-fallback-cmath.spv
216235
${spv_binary_dir}/libsycl-fallback-cmath-fp64.spv
217236
)
218237
add_custom_target(libsycldevice-fallback-obj DEPENDS
219238
${obj_binary_dir}/libsycl-fallback-cassert.${lib-suffix}
239+
${obj_binary_dir}/libsycl-fallback-cstring.${lib-suffix}
220240
${obj_binary_dir}/libsycl-fallback-complex.${lib-suffix}
221241
${obj_binary_dir}/libsycl-fallback-complex-fp64.${lib-suffix}
222242
${obj_binary_dir}/libsycl-fallback-cmath.${lib-suffix}
@@ -239,6 +259,7 @@ set(install_dest_lib lib${LLVM_LIBDIR_SUFFIX})
239259

240260
install(FILES ${devicelib-obj-file}
241261
${obj_binary_dir}/libsycl-fallback-cassert.${lib-suffix}
262+
${obj_binary_dir}/libsycl-fallback-cstring.${lib-suffix}
242263
${devicelib-obj-complex}
243264
${obj_binary_dir}/libsycl-fallback-complex.${lib-suffix}
244265
${devicelib-obj-complex-fp64}
@@ -252,6 +273,7 @@ install(FILES ${devicelib-obj-file}
252273
COMPONENT libsycldevice)
253274

254275
install(FILES ${spv_binary_dir}/libsycl-fallback-cassert.spv
276+
${spv_binary_dir}/libsycl-fallback-cstring.spv
255277
${spv_binary_dir}/libsycl-fallback-complex.spv
256278
${spv_binary_dir}/libsycl-fallback-complex-fp64.spv
257279
${spv_binary_dir}/libsycl-fallback-cmath.spv

‎libdevice/crt_wrapper.cpp‎

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#include "wrapper.h"
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#ifdef __SPIR__
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DEVICE_EXTERN_C
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void *memcpy(void *dest, const void *src, size_t n) {
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return __devicelib_memcpy(dest, src, n);
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}
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#if defined(_WIN32)
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// Truncates a wide (16 or 32 bit) string (wstr) into an ASCII string (str).
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// Any non-ASCII characters are replaced by question mark '?'.

‎libdevice/fallback-cstring.cpp‎

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//==-- fallback-cstring.cpp - fallback implementation of C string functions--=//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "wrapper.h"
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#ifdef __SPIR__
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void *__devicelib_memcpy(void *dest, const void *src, size_t n) {
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return __builtin_memcpy(dest, src, n);
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}
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#endif // __SPIR__

‎libdevice/wrapper.h‎

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// We need the following header to ensure the definition of all spirv variables
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// required by the wrapper libraries.
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#include "spirv_vars.h"
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DEVICE_EXTERN_C
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void *__devicelib_memcpy(void *dest, const void *src, size_t n);
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DEVICE_EXTERN_C
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void __devicelib_assert_fail(const char *expr, const char *file, int32_t line,
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const char *func, uint64_t gid0, uint64_t gid1,

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