Revert "[Driver] Add -fdiagnostics-hotness-threshold"

Summary:
The commit caused a documentation breakage.

llvm-svn: 306946

clang/docs/UsersManual.rst

@@ -322,27 +322,18 @@ output format of the diagnostics that it generates.
    by category, so it should be a high level category. We want dozens
    of these, not hundreds or thousands of them.
 
-.. _opt_fsave-optimization-record:
-
-**-fsave-optimization-record**
-   Write optimization remarks to a YAML file.
-
-   This option, which defaults to off, controls whether Clang writes
-   optimization reports to a YAML file. By recording diagnostics in a file,
-   using a structured YAML format, users can parse or sort the remarks in a
-   convenient way.
-
 .. _opt_fdiagnostics-show-hotness:
 
 **-f[no-]diagnostics-show-hotness**
    Enable profile hotness information in diagnostic line.
 
-   This option controls whether Clang prints the profile hotness associated
-   with diagnostics in the presence of profile-guided optimization information.
-   This is currently supported with optimization remarks (see
-   :ref:`Options to Emit Optimization Reports <rpass>`). The hotness information
-   allows users to focus on the hot optimization remarks that are likely to be
-   more relevant for run-time performance.
+   This option, which defaults to off, controls whether Clang prints the
+   profile hotness associated with a diagnostics in the presence of
+   profile-guided optimization information.  This is currently supported with
+   optimization remarks (see :ref:`Options to Emit Optimization Reports
+   <rpass>`).  The hotness information allows users to focus on the hot
+   optimization remarks that are likely to be more relevant for run-time
+   performance.
 
    For example, in this output, the block containing the callsite of `foo` was
    executed 3000 times according to the profile data:
@@ -353,23 +344,6 @@ output format of the diagnostics that it generates.
            sum += foo(x, x - 2);
                   ^
 
-   This option is implied when
-   :ref:`-fsave-optimization-record <opt_fsave-optimization-record>` is used.
-   Otherwise, it defaults to off.
-
-.. _opt_fdiagnostics-hotness-threshold
-
-**-fdiagnostics-hotness-threshold**
-   Prevent optimization remarks from being output if they do not have at least
-   this hotness value.
-
-   This option, which defaults to zero, controls the minimum hotness an
-   optimization remark would need in order to be output by Clang. This is
-   currently supported with optimization remarks (see :ref:`Options to Emit
-   Optimization Reports <rpass>`) when profile hotness information in
-   diagnostics is enabled (see
-   :ref:`-fdiagnostics-show-hotness <opt_fdiagnostics-show-hotness>`).
-
 .. _opt_fdiagnostics-fixit-info:
 
 **-f[no-]diagnostics-fixit-info**

clang/include/clang/Basic/DiagnosticDriverKinds.td

@@ -198,8 +198,8 @@ def warn_drv_unused_argument : Warning<
 def warn_drv_empty_joined_argument : Warning<
   "joined argument expects additional value: '%0'">,
   InGroup<UnusedCommandLineArgument>;
-def warn_drv_diagnostics_hotness_requires_pgo : Warning<
-  "argument '%0' requires profile-guided optimization information">,
+def warn_drv_fdiagnostics_show_hotness_requires_pgo : Warning<
+  "argument '-fdiagnostics-show-hotness' requires profile-guided optimization information">,
   InGroup<UnusedCommandLineArgument>;
 def warn_drv_clang_unsupported : Warning<
   "the clang compiler does not support '%0'">;

clang/include/clang/Driver/Options.td

@@ -723,9 +723,6 @@ def fdiagnostics_print_source_range_info : Flag<["-"], "fdiagnostics-print-sourc
     HelpText<"Print source range spans in numeric form">;
 def fdiagnostics_show_hotness : Flag<["-"], "fdiagnostics-show-hotness">, Group<f_Group>,
     Flags<[CC1Option]>, HelpText<"Enable profile hotness information in diagnostic line">;
-def fdiagnostics_hotness_threshold_EQ : Joined<["-"], "fdiagnostics-hotness-threshold=">,
-    Group<f_Group>, Flags<[CC1Option]>, MetaVarName<"<number>">,
-    HelpText<"Prevent optimization remarks from being output if they do not have at least this profile count">;
 def fdiagnostics_show_option : Flag<["-"], "fdiagnostics-show-option">, Group<f_Group>,
     Flags<[CC1Option]>, HelpText<"Print option name with mappable diagnostics">;
 def fdiagnostics_show_note_include_stack : Flag<["-"], "fdiagnostics-show-note-include-stack">,

clang/include/clang/Frontend/CodeGenOptions.def

@@ -261,10 +261,6 @@ VALUE_CODEGENOPT(EmitCheckPathComponentsToStrip, 32, 0)
 /// Whether to report the hotness of the code region for optimization remarks.
 CODEGENOPT(DiagnosticsWithHotness, 1, 0)
 
-/// The minimum hotness value a diagnostic needs in order to be included in
-/// optimization diagnostics.
-VALUE_CODEGENOPT(DiagnosticsHotnessThreshold, 32, 0)
-
 /// Whether copy relocations support is available when building as PIE.
 CODEGENOPT(PIECopyRelocations, 1, 0)
 

clang/lib/CodeGen/CodeGenAction.cpp

@@ -229,9 +229,6 @@ namespace clang {
       void *OldDiagnosticContext = Ctx.getDiagnosticContext();
       Ctx.setDiagnosticHandler(DiagnosticHandler, this);
       Ctx.setDiagnosticsHotnessRequested(CodeGenOpts.DiagnosticsWithHotness);
-      if (CodeGenOpts.DiagnosticsHotnessThreshold != 0)
-        Ctx.setDiagnosticsHotnessThreshold(
-            CodeGenOpts.DiagnosticsHotnessThreshold);
 
       std::unique_ptr<llvm::tool_output_file> OptRecordFile;
       if (!CodeGenOpts.OptRecordFile.empty()) {

clang/lib/Driver/ToolChains/Clang.cpp

@@ -4043,12 +4043,6 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
                    options::OPT_fno_diagnostics_show_hotness, false))
     CmdArgs.push_back("-fdiagnostics-show-hotness");
 
-  if (const Arg *A =
-          Args.getLastArg(options::OPT_fdiagnostics_hotness_threshold_EQ)) {
-    std::string Opt = std::string("-fdiagnostics-hotness-threshold=") + A->getValue();
-    CmdArgs.push_back(Args.MakeArgString(Opt));
-  }
-
   if (const Arg *A = Args.getLastArg(options::OPT_fdiagnostics_format_EQ)) {
     CmdArgs.push_back("-fdiagnostics-format");
     CmdArgs.push_back(A->getValue());

clang/lib/Frontend/CompilerInvocation.cpp

@@ -909,18 +909,12 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
   Opts.DiagnosticsWithHotness =
       Args.hasArg(options::OPT_fdiagnostics_show_hotness);
   bool UsingSampleProfile = !Opts.SampleProfileFile.empty();
-  bool UsingProfile = UsingSampleProfile ||
-      (Opts.getProfileUse() != CodeGenOptions::ProfileNone);
 
-  if (Opts.DiagnosticsWithHotness && !UsingProfile)
-    Diags.Report(diag::warn_drv_diagnostics_hotness_requires_pgo)
-        << "-fdiagnostics-show-hotness";
-
-  Opts.DiagnosticsHotnessThreshold = getLastArgUInt64Value(
-      Args, options::OPT_fdiagnostics_hotness_threshold_EQ, 0);
-  if (Opts.DiagnosticsHotnessThreshold > 0 && !UsingProfile)
-    Diags.Report(diag::warn_drv_diagnostics_hotness_requires_pgo)
-        << "-fdiagnostics-hotness-threshold=";
+  if (Opts.DiagnosticsWithHotness &&
+      Opts.getProfileUse() == CodeGenOptions::ProfileNone &&
+      !UsingSampleProfile) {
+    Diags.Report(diag::warn_drv_fdiagnostics_show_hotness_requires_pgo);
+  }
 
   // If the user requested to use a sample profile for PGO, then the
   // backend will need to track source location information so the profile

clang/test/Frontend/Inputs/optimization-remark-with-hotness-sample.proftext

@@ -1,7 +1,7 @@
 foo:0:0
  0: 0
 bar:29:29
- 9: foo:0
+ 6: foo:0
 main:0:0
  0: 0 bar:0
 

clang/test/Frontend/optimization-remark-with-hotness.c

@@ -15,14 +15,12 @@
 // RUN:     optimization-remark-with-hotness.c %s -emit-llvm-only \
 // RUN:     -fprofile-sample-use=%t-sample.profdata -Rpass=inline \
 // RUN:     -Rpass-analysis=inline -Rpass-missed=inline \
-// RUN:     -fdiagnostics-show-hotness -fdiagnostics-hotness-threshold=10 \
-// RUN:     -verify
+// RUN:     -fdiagnostics-show-hotness -verify
 // The clang version of the previous test.
 // RUN: %clang -target x86_64-apple-macosx10.9 %s -c -emit-llvm -o /dev/null \
 // RUN:     -fprofile-instr-use=%t.profdata -Rpass=inline \
 // RUN:     -Rpass-analysis=inline -Rpass-missed=inline \
-// RUN:     -fdiagnostics-show-hotness -fdiagnostics-hotness-threshold=10 \
-// RUN:     -Xclang -verify
+// RUN:     -fdiagnostics-show-hotness -Xclang -verify
 // RUN: %clang_cc1 -triple x86_64-apple-macosx10.9 -main-file-name \
 // RUN:     optimization-remark-with-hotness.c %s -emit-llvm-only \
 // RUN:     -fprofile-instrument-use-path=%t.profdata -Rpass=inline \
@@ -30,18 +28,11 @@
 // RUN: %clang_cc1 -triple x86_64-apple-macosx10.9 -main-file-name \
 // RUN:     optimization-remark-with-hotness.c %s -emit-llvm-only \
 // RUN:     -fprofile-instrument-use-path=%t.profdata -Rpass=inline \
-// RUN:     -Rpass-analysis=inline -Rno-pass-with-hotness 2>&1 | FileCheck \
+// RUN:     -Rpass-analysis=inline -Rno-pass-with-hotness  2>&1 | FileCheck \
 // RUN:     -check-prefix=HOTNESS_OFF %s
 // RUN: %clang_cc1 -triple x86_64-apple-macosx10.9 -main-file-name \
 // RUN:     optimization-remark-with-hotness.c %s -emit-llvm-only \
-// RUN:     -fprofile-instrument-use-path=%t.profdata -Rpass=inline \
-// RUN:     -Rpass-analysis=inline -fdiagnostics-show-hotness \
-// RUN:     -fdiagnostics-hotness-threshold=100 2>&1 \
-// RUN:     | FileCheck -allow-empty -check-prefix=THRESHOLD %s
-// RUN: %clang_cc1 -triple x86_64-apple-macosx10.9 -main-file-name \
-// RUN:     optimization-remark-with-hotness.c %s -emit-llvm-only \
-// RUN:     -Rpass=inline -Rpass-analysis=inline \
-// RUN:     -fdiagnostics-show-hotness -fdiagnostics-hotness-threshold=10 2>&1 \
+// RUN:     -Rpass=inline -Rpass-analysis=inline -fdiagnostics-show-hotness  2>&1 \
 // RUN:     | FileCheck -check-prefix=NO_PGO %s
 
 int foo(int x, int y) __attribute__((always_inline));
@@ -52,10 +43,7 @@ int sum = 0;
 void bar(int x) {
   // HOTNESS_OFF: foo inlined into bar
   // HOTNESS_OFF-NOT: hotness:
-  // THRESHOLD-NOT: inlined
-  // THRESHOLD-NOT: hotness
   // NO_PGO: '-fdiagnostics-show-hotness' requires profile-guided optimization information
-  // NO_PGO: '-fdiagnostics-hotness-threshold=' requires profile-guided optimization information
   // expected-remark@+2 {{foo should always be inlined (cost=always) (hotness: 30)}}
   // expected-remark@+1 {{foo inlined into bar (hotness: 30)}}
   sum += foo(x, x - 2);