On 2018-03-01 — 20:02, Aaron Watry wrote: > Used to calculate the default CLC language version based on the --cl-std in > build args > and the device capabilities. > > According to section 5.8.4.5 of the 2.0 spec, the CL C version is chosen by: > 1) If you have -cl-std=CL1.1+ use the version specified > 2) If not, use the highest 1.x version that the device supports > > Curiously, there is no valid value for -cl-std=CL1.0 > > Validates requested cl-std against device_clc_version > > Signed-off-by: Aaron Watry <awa...@gmail.com> > Cc: Pierre Moreau <pierre.mor...@free.fr> > > v6: (Pierre) Add more const and fix some whitespace > > v5: (Aaron) Use a collection of cl versions instead of switch cases > Consolidates the string, numeric version, and clc langstandard::kind > > v4: (Pierre) Split get_language_version addition and use into separate patches > Squash patches that add the helpers and validate the language standard > > v3: Change device_version to device_clc_version > > v2: (Pierre) Move create_compiler_instance changes to correct patch > to prevent temporary build breakage. > Convert version_str into unsigned and use it to find language version > Add build_error for unknown language version string > Whitespace fixes > --- > .../state_trackers/clover/llvm/invocation.cpp | 63 > ++++++++++++++++++++++ > 1 file changed, 63 insertions(+) > > diff --git a/src/gallium/state_trackers/clover/llvm/invocation.cpp > b/src/gallium/state_trackers/clover/llvm/invocation.cpp > index 0bc0cccc6e..0f854b9049 100644 > --- a/src/gallium/state_trackers/clover/llvm/invocation.cpp > +++ b/src/gallium/state_trackers/clover/llvm/invocation.cpp > @@ -63,6 +63,23 @@ using ::llvm::Module; > using ::llvm::raw_string_ostream; > > namespace { > + > + struct cl_version { > + std::string version_str; // CL Version > + unsigned version_number; // Numeric CL Version > + clang::LangStandard::Kind clc_lang_standard; // lang standard for > version > + }; > + > + static const unsigned ANY_VERSION = 999; > + const cl_version cl_versions[] = { > + { "1.0", 100, clang::LangStandard::lang_opencl10}, > + { "1.1", 110, clang::LangStandard::lang_opencl11}, > + { "1.2", 120, clang::LangStandard::lang_opencl12}, > + { "2.0", 200, clang::LangStandard::lang_opencl20}, > + { "2.1", 210, clang::LangStandard::lang_unspecified}, //2.1 doesn't > exist > + { "2.2", 220, clang::LangStandard::lang_unspecified}, //2.2 doesn't > exist > + };
Given that OpenCL C version are no longer a 1:1 mapping to OpenCL API version, and with the introduction of OpenCL C++ 1.0 with OpenCL 2.2, I would go with two different tables: * one matching strings to the integer version; * one matching integer or string version, to the OpenCL C LangStandard and later we can have a third one for matching integer/string to OpenCL C++ LangStandard. > + > void > init_targets() { > static bool targets_initialized = false; > @@ -93,6 +110,52 @@ namespace { > return ctx; > } > > + const struct cl_version I think you forgot the reference there, otherwise if you want to return a copy, you can remove the `const` keyword as it has no impact on copies. > + get_cl_version(const std::string &version_str, > + unsigned max = ANY_VERSION) { > + for (const struct cl_version version : cl_versions) { Please make `version` into a reference: no need to create a copy each time. > + if (version.version_number == max || version.version_str == > version_str) { > + return version; > + } > + } > + throw build_error("Unknown/Unsupported language version"); > + } > + > + clang::LangStandard::Kind > + get_lang_standard_from_version_str(const std::string &version_str, > + bool is_build_opt = false) { > + /** > + * Per CL 2.0 spec, section 5.8.4.5: > + * If it's an option, use the value directly. > + * If it's a device version, clamp to max 1.x version, a.k.a. 1.2 > + */ Please switch to regular C++-style comments. > + const struct cl_version version = get_cl_version(version_str, > + is_build_opt ? ANY_VERSION : 120); > + return version.clc_lang_standard; > + } > + > + clang::LangStandard::Kind > + get_language_version(const std::vector<std::string> &opts, > + const std::string &device_version) { > + > + const std::string search = "-cl-std=CL"; > + > + for (auto opt: opts) { opt could be a constant reference, to avoid making copies of strings every time. With those modifications, this is Reviewed-by: Pierre Moreau <pierre.mor...@free.fr> > + auto pos = opt.find(search); > + if (pos == 0){ > + const auto ver = opt.substr(pos + search.size()); > + const auto device_ver = get_cl_version(device_version); > + const auto requested = get_cl_version(ver); > + if (requested.version_number > device_ver.version_number) { > + throw build_error(); > + } > + return get_lang_standard_from_version_str(ver, true); > + } > + } > + > + return get_lang_standard_from_version_str(device_version); > + } > + > std::unique_ptr<clang::CompilerInstance> > create_compiler_instance(const device &dev, > const std::vector<std::string> &opts, > -- > 2.14.1 >
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