diff --git a/clang/docs/ClangCommandLineReference.rst b/clang/docs/ClangCommandLineReference.rst --- a/clang/docs/ClangCommandLineReference.rst +++ b/clang/docs/ClangCommandLineReference.rst @@ -1942,6 +1942,14 @@ .. option:: -ftime-report +.. option:: -ftime-trace + +Turn on time profiler + +.. option:: -ftime-trace-granularity= + +Minimum time granularity (in microseconds) traced by time profiler + .. option:: -ftls-model= .. option:: -ftrap-function= diff --git a/clang/include/clang/Basic/CodeGenOptions.def b/clang/include/clang/Basic/CodeGenOptions.def --- a/clang/include/clang/Basic/CodeGenOptions.def +++ b/clang/include/clang/Basic/CodeGenOptions.def @@ -226,6 +226,8 @@ CODEGENOPT(StrictVTablePointers, 1, 0) ///< Optimize based on the strict vtable pointers CODEGENOPT(TimePasses , 1, 0) ///< Set when -ftime-report is enabled. CODEGENOPT(TimeTrace , 1, 0) ///< Set when -ftime-trace is enabled. +VALUE_CODEGENOPT(TimeTraceGranularity, 32, 500) ///< Minimum time granularity (in microseconds), + ///< traced by time profiler CODEGENOPT(UnrollLoops , 1, 0) ///< Control whether loops are unrolled. CODEGENOPT(RerollLoops , 1, 0) ///< Control whether loops are rerolled. CODEGENOPT(NoUseJumpTables , 1, 0) ///< Set when -fno-jump-tables is enabled. diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td --- a/clang/include/clang/Driver/Options.td +++ b/clang/include/clang/Driver/Options.td @@ -1757,7 +1757,11 @@ def : Flag<["-"], "fterminated-vtables">, Alias; def fthreadsafe_statics : Flag<["-"], "fthreadsafe-statics">, Group; def ftime_report : Flag<["-"], "ftime-report">, Group, Flags<[CC1Option]>; -def ftime_trace : Flag<["-"], "ftime-trace">, Group, Flags<[CC1Option, CoreOption]>; +def ftime_trace : Flag<["-"], "ftime-trace">, Group, + HelpText<"Turn on time profiler">, Flags<[CC1Option, CoreOption]>; +def ftime_trace_granularity_EQ : Joined<["-"], "ftime-trace-granularity=">, Group, + HelpText<"Minimum time granularity (in microseconds) traced by time profiler">, + Flags<[CC1Option, CoreOption]>; def ftlsmodel_EQ : Joined<["-"], "ftls-model=">, Group, Flags<[CC1Option]>; def ftrapv : Flag<["-"], "ftrapv">, Group, Flags<[CC1Option]>, HelpText<"Trap on integer overflow">; diff --git a/clang/include/clang/Frontend/FrontendOptions.h b/clang/include/clang/Frontend/FrontendOptions.h --- a/clang/include/clang/Frontend/FrontendOptions.h +++ b/clang/include/clang/Frontend/FrontendOptions.h @@ -451,6 +451,9 @@ /// Filename to write statistics to. std::string StatsFile; + /// Minimum time granularity (in microseconds) traced by time profiler. + unsigned TimeTraceGranularity; + public: FrontendOptions() : DisableFree(false), RelocatablePCH(false), ShowHelp(false), @@ -461,7 +464,7 @@ UseGlobalModuleIndex(true), GenerateGlobalModuleIndex(true), ASTDumpDecls(false), ASTDumpLookups(false), BuildingImplicitModule(false), ModulesEmbedAllFiles(false), - IncludeTimestamps(true) {} + IncludeTimestamps(true), TimeTraceGranularity(500) {} /// getInputKindForExtension - Return the appropriate input kind for a file /// extension. For example, "c" would return InputKind::C. diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp --- a/clang/lib/Driver/ToolChains/Clang.cpp +++ b/clang/lib/Driver/ToolChains/Clang.cpp @@ -4575,6 +4575,7 @@ Args.AddLastArg(CmdArgs, options::OPT_fdiagnostics_parseable_fixits); Args.AddLastArg(CmdArgs, options::OPT_ftime_report); Args.AddLastArg(CmdArgs, options::OPT_ftime_trace); + Args.AddLastArg(CmdArgs, options::OPT_ftime_trace_granularity_EQ); Args.AddLastArg(CmdArgs, options::OPT_ftrapv); Args.AddLastArg(CmdArgs, options::OPT_malign_double); diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp --- a/clang/lib/Frontend/CompilerInvocation.cpp +++ b/clang/lib/Frontend/CompilerInvocation.cpp @@ -1769,6 +1769,8 @@ Opts.ShowTimers = Args.hasArg(OPT_ftime_report); Opts.PrintSupportedCPUs = Args.hasArg(OPT_print_supported_cpus); Opts.TimeTrace = Args.hasArg(OPT_ftime_trace); + Opts.TimeTraceGranularity = + getLastArgIntValue(Args, OPT_ftime_trace_granularity_EQ, 500, Diags); Opts.ShowVersion = Args.hasArg(OPT_version); Opts.ASTMergeFiles = Args.getAllArgValues(OPT_ast_merge); Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm); diff --git a/clang/test/Driver/check-time-trace.cpp b/clang/test/Driver/check-time-trace.cpp --- a/clang/test/Driver/check-time-trace.cpp +++ b/clang/test/Driver/check-time-trace.cpp @@ -1,5 +1,5 @@ // REQUIRES: shell -// RUN: %clangxx -S -ftime-trace -mllvm --time-trace-granularity=0 -o %T/check-time-trace %s +// RUN: %clangxx -S -ftime-trace -ftime-trace-granularity=0 -o %T/check-time-trace %s // RUN: cat %T/check-time-trace.json \ // RUN: | %python -c 'import json, sys; json.dump(json.loads(sys.stdin.read()), sys.stdout, sort_keys=True, indent=2)' \ // RUN: | FileCheck %s diff --git a/clang/tools/driver/cc1_main.cpp b/clang/tools/driver/cc1_main.cpp --- a/clang/tools/driver/cc1_main.cpp +++ b/clang/tools/driver/cc1_main.cpp @@ -216,9 +216,10 @@ bool Success = CompilerInvocation::CreateFromArgs( Clang->getInvocation(), Argv.begin(), Argv.end(), Diags); - if (Clang->getFrontendOpts().TimeTrace) - llvm::timeTraceProfilerInitialize(); - + if (Clang->getFrontendOpts().TimeTrace) { + llvm::timeTraceProfilerInitialize( + Clang->getFrontendOpts().TimeTraceGranularity); + } // --print-supported-cpus takes priority over the actual compilation. if (Clang->getFrontendOpts().PrintSupportedCPUs) return PrintSupportedCPUs(Clang->getTargetOpts().Triple); diff --git a/llvm/include/llvm/Support/TimeProfiler.h b/llvm/include/llvm/Support/TimeProfiler.h --- a/llvm/include/llvm/Support/TimeProfiler.h +++ b/llvm/include/llvm/Support/TimeProfiler.h @@ -19,7 +19,7 @@ /// Initialize the time trace profiler. /// This sets up the global \p TimeTraceProfilerInstance /// variable to be the profiler instance. -void timeTraceProfilerInitialize(); +void timeTraceProfilerInitialize(unsigned TimeTraceGranularity); /// Cleanup the time trace profiler, if it was initialized. void timeTraceProfilerCleanup(); diff --git a/llvm/lib/Support/TimeProfiler.cpp b/llvm/lib/Support/TimeProfiler.cpp --- a/llvm/lib/Support/TimeProfiler.cpp +++ b/llvm/lib/Support/TimeProfiler.cpp @@ -24,11 +24,8 @@ namespace llvm { -static cl::opt TimeTraceGranularity( - "time-trace-granularity", - cl::desc( - "Minimum time granularity (in microseconds) traced by time profiler"), - cl::init(500)); +// Minimum time granularity (in microseconds) traced by time profiler +unsigned TimeTraceGranularity = 500; TimeTraceProfiler *TimeTraceProfilerInstance = nullptr; @@ -163,10 +160,11 @@ time_point StartTime; }; -void timeTraceProfilerInitialize() { +void timeTraceProfilerInitialize(unsigned TimeTraceGranularity_) { assert(TimeTraceProfilerInstance == nullptr && "Profiler should not be initialized"); TimeTraceProfilerInstance = new TimeTraceProfiler(); + TimeTraceGranularity = TimeTraceGranularity_; } void timeTraceProfilerCleanup() {