ROCm · ronlieb · Oct 29, 2025 · Oct 29, 2025 · Oct 29, 2025 · Oct 29, 2025
diff --git a/bolt/include/bolt/Core/BinaryContext.h b/bolt/include/bolt/Core/BinaryContext.h
@@ -781,11 +781,6 @@ class BinaryContext {
     uint64_t PseudoProbeLooseMatchedSampleCount{0};
     ///   the count of call matched samples
     uint64_t CallMatchedSampleCount{0};
-    ///   the number of stale functions that have matching number of blocks in
-    ///   the profile
-    uint64_t NumStaleFuncsWithEqualBlockCount{0};
-    ///   the number of blocks that have matching size but a differing hash
-    uint64_t NumStaleBlocksWithEqualIcount{0};
   } Stats;
 
   // Original binary execution count stats.

diff --git a/bolt/lib/Passes/BinaryPasses.cpp b/bolt/lib/Passes/BinaryPasses.cpp
@@ -1508,12 +1508,6 @@ Error PrintProgramStats::runOnFunctions(BinaryContext &BC) {
   if (NumAllStaleFunctions) {
     const float PctStale =
         NumAllStaleFunctions / (float)NumAllProfiledFunctions * 100.0f;
-    const float PctStaleFuncsWithEqualBlockCount =
-        (float)BC.Stats.NumStaleFuncsWithEqualBlockCount /
-        NumAllStaleFunctions * 100.0f;
-    const float PctStaleBlocksWithEqualIcount =
-        (float)BC.Stats.NumStaleBlocksWithEqualIcount /
-        BC.Stats.NumStaleBlocks * 100.0f;
     auto printErrorOrWarning = [&]() {
       if (PctStale > opts::StaleThreshold)
         BC.errs() << "BOLT-ERROR: ";
@@ -1536,17 +1530,6 @@ Error PrintProgramStats::runOnFunctions(BinaryContext &BC) {
                 << "%) belong to functions with invalid"
                    " (possibly stale) profile.\n";
     }
-    BC.outs() << "BOLT-INFO: " << BC.Stats.NumStaleFuncsWithEqualBlockCount
-              << " stale function"
-              << (BC.Stats.NumStaleFuncsWithEqualBlockCount == 1 ? "" : "s")
-              << format(" (%.1f%% of all stale)",
-                        PctStaleFuncsWithEqualBlockCount)
-              << " have matching block count.\n";
-    BC.outs() << "BOLT-INFO: " << BC.Stats.NumStaleBlocksWithEqualIcount
-              << " stale block"
-              << (BC.Stats.NumStaleBlocksWithEqualIcount == 1 ? "" : "s")
-              << format(" (%.1f%% of all stale)", PctStaleBlocksWithEqualIcount)
-              << " have matching icount.\n";
     if (PctStale > opts::StaleThreshold) {
       return createFatalBOLTError(
           Twine("BOLT-ERROR: stale functions exceed specified threshold of ") +

diff --git a/bolt/lib/Profile/YAMLProfileReader.cpp b/bolt/lib/Profile/YAMLProfileReader.cpp
@@ -350,9 +350,6 @@ bool YAMLProfileReader::parseFunctionProfile(
              << MismatchedCalls << " calls, and " << MismatchedEdges
              << " edges in profile did not match function " << BF << '\n';
 
-    if (YamlBF.NumBasicBlocks != BF.size())
-      ++BC.Stats.NumStaleFuncsWithEqualBlockCount;
-
     if (!opts::InferStaleProfile)
       return false;
     ArrayRef<ProbeMatchSpec> ProbeMatchSpecs;

diff --git a/clang-tools-extra/clang-tidy/ClangTidyOptions.cpp b/clang-tools-extra/clang-tidy/ClangTidyOptions.cpp
@@ -247,7 +247,7 @@ ClangTidyOptions ClangTidyOptions::getDefaults() {
   Options.WarningsAsErrors = "";
   Options.HeaderFileExtensions = {"", "h", "hh", "hpp", "hxx"};
   Options.ImplementationFileExtensions = {"c", "cc", "cpp", "cxx"};
-  Options.HeaderFilterRegex = "";
+  Options.HeaderFilterRegex = ".*";
   Options.ExcludeHeaderFilterRegex = "";
   Options.SystemHeaders = false;
   Options.FormatStyle = "none";

diff --git a/clang-tools-extra/clang-tidy/tool/ClangTidyMain.cpp b/clang-tools-extra/clang-tidy/tool/ClangTidyMain.cpp
@@ -93,7 +93,7 @@ Configuration files:
     WarningsAsErrors:             ''
     HeaderFileExtensions:         ['', 'h','hh','hpp','hxx']
     ImplementationFileExtensions: ['c','cc','cpp','cxx']
-    HeaderFilterRegex:            ''
+    HeaderFilterRegex:            '.*'
     FormatStyle:                  none
     InheritParentConfig:          true
     User:                         user
@@ -132,14 +132,16 @@ file, if any.
 
 static cl::opt<std::string> HeaderFilter("header-filter", desc(R"(
 Regular expression matching the names of the
-headers to output diagnostics from. Diagnostics
+headers to output diagnostics from. The default
+value is '.*', i.e. diagnostics from all non-system
+headers are displayed by default. Diagnostics
 from the main file of each translation unit are
 always displayed.
 Can be used together with -line-filter.
 This option overrides the 'HeaderFilterRegex'
 option in .clang-tidy file, if any.
 )"),
-                                         cl::init(""),
+                                         cl::init(".*"),
                                          cl::cat(ClangTidyCategory));
 
 static cl::opt<std::string> ExcludeHeaderFilter("exclude-header-filter",
@@ -379,9 +381,9 @@ static void printStats(const ClangTidyStats &Stats) {
                    << " with check filters";
     llvm::errs() << ").\n";
     if (Stats.ErrorsIgnoredNonUserCode)
-      llvm::errs() << "Use -header-filter=.* to display errors from all "
-                      "non-system headers. Use -system-headers to display "
-                      "errors from system headers as well.\n";
+      llvm::errs() << "Use -header-filter=.* or leave it as default to display "
+                      "errors from all non-system headers. Use -system-headers "
+                      "to display errors from system headers as well.\n";
   }
 }
 

diff --git a/clang-tools-extra/clang-tidy/utils/FixItHintUtils.cpp b/clang-tools-extra/clang-tidy/utils/FixItHintUtils.cpp
@@ -21,6 +21,11 @@ FixItHint changeVarDeclToReference(const VarDecl &Var, ASTContext &Context) {
   SourceLocation AmpLocation = Var.getLocation();
   auto Token = utils::lexer::getPreviousToken(
       AmpLocation, Context.getSourceManager(), Context.getLangOpts());
+
+  // For parameter packs the '&' must go before the '...' token
+  if (Token.is(tok::ellipsis))
+    return FixItHint::CreateInsertion(Token.getLocation(), "&");
+
   if (!Token.is(tok::unknown))
     AmpLocation = Lexer::getLocForEndOfToken(Token.getLocation(), 0,
                                              Context.getSourceManager(),

diff --git a/clang-tools-extra/docs/ReleaseNotes.rst b/clang-tools-extra/docs/ReleaseNotes.rst
@@ -70,6 +70,11 @@ Potentially Breaking Changes
     :doc:`bugprone-signed-char-misuse
     <clang-tidy/checks/bugprone/signed-char-misuse>`
 
+- :program:`clang-tidy` now displays warnings from all non-system headers by
+  default. Previously, users had to explicitly opt-in to header warnings using
+  `-header-filter='.*'`. To disable warnings from non-system, set `-header-filter`
+  to an empty string.
+
 Improvements to clangd
 ----------------------
 
@@ -132,6 +137,11 @@ Improvements to clang-tidy
   when run over C files. If ``-std`` is not specified, it defaults to
   ``c99-or-later``.
 
+- :program:`clang-tidy` now displays warnings from all non-system headers by
+  default. Previously, users had to explicitly opt-in to header warnings using
+  `-header-filter='.*'`. To disable warnings from non-system, set `-header-filter`
+  to an empty string.
+
 - :program:`clang-tidy` no longer attempts to analyze code from system headers
   by default, greatly improving performance. This behavior is disabled if the
   `SystemHeaders` option is enabled.
@@ -407,7 +417,8 @@ Changes in existing checks
 
 - Improved :doc:`performance-unnecessary-value-param
   <clang-tidy/checks/performance/unnecessary-value-param>` by printing
-  the type of the diagnosed variable.
+  the type of the diagnosed variable and correctly generating fix-it hints for
+  parameter-pack arguments.
 
 - Improved :doc:`portability-template-virtual-member-function
   <clang-tidy/checks/portability/template-virtual-member-function>` check to

diff --git a/clang-tools-extra/docs/clang-tidy/index.rst b/clang-tools-extra/docs/clang-tidy/index.rst
@@ -215,7 +215,9 @@ An overview of all the command-line options:
                                        This option overrides the 'FormatStyle` option in
                                        .clang-tidy file, if any.
     --header-filter=<string>         - Regular expression matching the names of the
-                                       headers to output diagnostics from. Diagnostics
+                                       headers to output diagnostics from. The default
+                                       value is '.*', i.e. diagnostics from all non-system
+                                       headers are displayed by default. Diagnostics
                                        from the main file of each translation unit are
                                        always displayed.
                                        Can be used together with -line-filter.
@@ -338,7 +340,7 @@ An overview of all the command-line options:
       WarningsAsErrors:    ''
       HeaderFileExtensions:         ['', 'h','hh','hpp','hxx']
       ImplementationFileExtensions: ['c','cc','cpp','cxx']
-      HeaderFilterRegex:   ''
+      HeaderFilterRegex:   '.*'
       FormatStyle:         none
       InheritParentConfig: true
       User:                user

diff --git a/clang-tools-extra/test/clang-tidy/checkers/abseil/no-internal-dependencies.cpp b/clang-tools-extra/test/clang-tidy/checkers/abseil/no-internal-dependencies.cpp
@@ -1,4 +1,4 @@
-// RUN: %check_clang_tidy %s abseil-no-internal-dependencies %t,  -- -- -I %S/Inputs
+// RUN: %check_clang_tidy %s abseil-no-internal-dependencies %t,  -- -header-filter='' -- -I %S/Inputs
 // RUN: clang-tidy -checks='-*, abseil-no-internal-dependencies' -header-filter='.*' %s -- -I %S/Inputs 2>&1 | FileCheck %s
 
 #include "absl/strings/internal-file.h"

diff --git a/clang-tools-extra/test/clang-tidy/checkers/abseil/no-namespace.cpp b/clang-tools-extra/test/clang-tidy/checkers/abseil/no-namespace.cpp
@@ -1,4 +1,4 @@
-// RUN: %check_clang_tidy %s abseil-no-namespace %t -- -- -I %S/Inputs
+// RUN: %check_clang_tidy %s abseil-no-namespace %t -- -header-filter='' -- -I %S/Inputs
 // RUN: clang-tidy -checks='-*, abseil-no-namespace' -header-filter='.*' %s -- -I %S/Inputs 2>&1 | FileCheck %s
 
 /// Warning will not be triggered on internal Abseil code that is included.

diff --git a/clang-tools-extra/test/clang-tidy/checkers/bugprone/reserved-identifier.cpp b/clang-tools-extra/test/clang-tidy/checkers/bugprone/reserved-identifier.cpp
@@ -1,8 +1,9 @@
-// RUN: %check_clang_tidy %s bugprone-reserved-identifier %t -- -- \
+// RUN: %check_clang_tidy %s bugprone-reserved-identifier %t -- \
+// RUN:   -header-filter='' -- \
 // RUN:   -I%S/Inputs/reserved-identifier \
 // RUN:   -isystem %S/Inputs/reserved-identifier/system
 
-// no warnings expected without -header-filter=
+// no warnings expected with -header-filter=''
 #include "user-header.h"
 #include <system-header.h>
 

diff --git a/clang-tools-extra/test/clang-tidy/checkers/google/upgrade-googletest-case.cpp b/clang-tools-extra/test/clang-tidy/checkers/google/upgrade-googletest-case.cpp
@@ -1,5 +1,5 @@
-// RUN: %check_clang_tidy %s google-upgrade-googletest-case %t -- -- -I%S/Inputs
-// RUN: %check_clang_tidy -check-suffix=NOSUITE %s google-upgrade-googletest-case %t -- -- -DNOSUITE -I%S/Inputs/gtest/nosuite
+// RUN: %check_clang_tidy %s google-upgrade-googletest-case %t -- -- -isystem%S/Inputs
+// RUN: %check_clang_tidy -check-suffix=NOSUITE %s google-upgrade-googletest-case %t -- -- -DNOSUITE -isystem%S/Inputs/gtest/nosuite
 
 #include "gtest/gtest.h"
 

diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/replace-auto-ptr.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/replace-auto-ptr.cpp
@@ -1,4 +1,4 @@
-// RUN: %check_clang_tidy %s modernize-replace-auto-ptr %t -- -- -I %S/Inputs/replace-auto-ptr
+// RUN: %check_clang_tidy %s modernize-replace-auto-ptr %t -- -- -isystem %S/Inputs/replace-auto-ptr
 
 // CHECK-FIXES: #include <utility>
 

diff --git a/clang-tools-extra/test/clang-tidy/checkers/modernize/use-using.cpp b/clang-tools-extra/test/clang-tidy/checkers/modernize/use-using.cpp
@@ -1,4 +1,4 @@
-// RUN: %check_clang_tidy %s modernize-use-using %t -- -- -fno-delayed-template-parsing -I %S/Inputs/use-using/
+// RUN: %check_clang_tidy %s modernize-use-using %t -- -- -fno-delayed-template-parsing -isystem %S/Inputs/use-using/
 
 typedef int Type;
 // CHECK-MESSAGES: :[[@LINE-1]]:1: warning: use 'using' instead of 'typedef' [modernize-use-using]

diff --git a/clang-tools-extra/test/clang-tidy/checkers/performance/unnecessary-value-param-templates.cpp b/clang-tools-extra/test/clang-tidy/checkers/performance/unnecessary-value-param-templates.cpp
@@ -96,3 +96,34 @@ void lambdaNonConstAutoValue() {
   };
   fn(ExpensiveToCopyType());
 }
+
+template <typename... Args>
+void ParameterPack(Args... args) {
+  // CHECK-MESSAGES: [[@LINE-1]]:28: warning: the parameter 'args' of type 'ExpensiveToCopyType'
+  // CHECK-FIXES: void ParameterPack(const Args&... args) {
+}
+
+template <typename... Args>
+void ParameterPackConst(Args const... args) {
+  // CHECK-MESSAGES: [[@LINE-1]]:39: warning: the const qualified parameter 'args' of type 'const ExpensiveToCopyType'
+  // CHECK-FIXES: void ParameterPackConst(Args const&... args) {
+}
+
+template <typename... Args>
+void ParameterPackWithParams(const ExpensiveToCopyType E1, ExpensiveToCopyType E2, Args... args) {
+  // CHECK-MESSAGES: [[@LINE-1]]:56: warning: the const qualified parameter 'E1'
+  // CHECK-MESSAGES: [[@LINE-2]]:80: warning: the parameter 'E2'
+  // CHECK-MESSAGES: [[@LINE-3]]:92: warning: the parameter 'args'
+  // CHECK-FIXES: void ParameterPackWithParams(const ExpensiveToCopyType& E1, const ExpensiveToCopyType& E2, const Args&... args) {
+}
+
+template <typename... Args>
+void PackWithNonExpensive(int x, Args... args) {}
+
+void instantiatedParameterPack() {
+  ExpensiveToCopyType E;
+  ParameterPack(E);
+  ParameterPackConst(E);
+  ParameterPackWithParams(E, E, E);
+  PackWithNonExpensive(5, 5);
+}
diff --git a/clang-tools-extra/test/clang-tidy/checkers/readability/duplicate-include.cpp b/clang-tools-extra/test/clang-tidy/checkers/readability/duplicate-include.cpp
@@ -1,4 +1,6 @@
-// RUN: %check_clang_tidy %s readability-duplicate-include %t -- -- -isystem %S/Inputs/duplicate-include/system -I %S/Inputs/duplicate-include
+// RUN: %check_clang_tidy %s readability-duplicate-include %t -- \
+// RUN:   -header-filter='' \
+// RUN:   -- -isystem %S/Inputs/duplicate-include/system -I %S/Inputs/duplicate-include
 
 int a;
 #include <string.h>

diff --git a/clang-tools-extra/test/clang-tidy/checkers/readability/identifier-naming.cpp b/clang-tools-extra/test/clang-tidy/checkers/readability/identifier-naming.cpp
@@ -86,7 +86,9 @@
 // RUN:     readability-identifier-naming.LocalPointerPrefix: 'l_', \
 // RUN:     readability-identifier-naming.LocalConstantPointerCase: CamelCase, \
 // RUN:     readability-identifier-naming.LocalConstantPointerPrefix: 'lc_', \
-// RUN:   }}' -- -fno-delayed-template-parsing -Dbad_macro \
+// RUN:   }}' \
+// RUN:   -header-filter='' \
+// RUN:   -- -fno-delayed-template-parsing -Dbad_macro \
 // RUN:   -I%S/Inputs/identifier-naming \
 // RUN:   -isystem %S/Inputs/identifier-naming/system
 
@@ -95,8 +97,7 @@
 #include <system-header.h>
 #include <coroutines.h>
 #include "user-header.h"
-// NO warnings or fixes expected from declarations within header files without
-// the -header-filter= option
+// NO warnings or fixes expected from declarations with the -header-filter='' option
 
 namespace FOO_NS {
 // CHECK-MESSAGES: :[[@LINE-1]]:11: warning: invalid case style for namespace 'FOO_NS' [readability-identifier-naming]

diff --git a/clang-tools-extra/test/clang-tidy/infrastructure/default-header-filter.cpp b/clang-tools-extra/test/clang-tidy/infrastructure/default-header-filter.cpp
@@ -0,0 +1,27 @@
+
+// RUN: clang-tidy -checks='-*,google-explicit-constructor' --config='{}' %s -- -I %S/Inputs/file-filter -isystem %S/Inputs/file-filter/system 2>&1 | FileCheck --check-prefix=CHECK-DEFAULT %s
+// RUN: clang-tidy -checks='-*,google-explicit-constructor' --config='{}' -header-filter='' %s -- -I %S/Inputs/file-filter -isystem %S/Inputs/file-filter/system 2>&1 | FileCheck --check-prefix=CHECK-EMPTY %s
+// RUN: clang-tidy -checks='-*,google-explicit-constructor' --config='{}' -header-filter='.*' %s -- -I %S/Inputs/file-filter -isystem %S/Inputs/file-filter/system 2>&1 | FileCheck --check-prefix=CHECK-EXPLICIT %s
+// RUN: clang-tidy -checks='-*,google-explicit-constructor' --config='{}' %s -- -I %S/Inputs/file-filter -isystem %S/Inputs/file-filter/system 2>&1 | FileCheck --check-prefix=CHECK-NO-SYSTEM %s
+// RUN: clang-tidy -checks='-*,google-explicit-constructor' --config='{}' -system-headers %s -- -I %S/Inputs/file-filter -isystem %S/Inputs/file-filter/system 2>&1 | FileCheck --check-prefix=CHECK-WITH-SYSTEM %s
+
+#include "header1.h"
+// CHECK-DEFAULT: header1.h:1:12: warning: single-argument constructors must be marked explicit
+// CHECK-EMPTY-NOT: header1.h:1:12: warning:
+// CHECK-EXPLICIT: header1.h:1:12: warning: single-argument constructors must be marked explicit
+// CHECK-NO-SYSTEM: header1.h:1:12: warning: single-argument constructors must be marked explicit
+// CHECK-WITH-SYSTEM-DAG: header1.h:1:12: warning: single-argument constructors must be marked explicit
+
+#include <system-header.h>
+// CHECK-DEFAULT-NOT: system-header.h:1:12: warning:
+// CHECK-EMPTY-NOT: system-header.h:1:12: warning:
+// CHECK-EXPLICIT-NOT: system-header.h:1:12: warning:
+// CHECK-NO-SYSTEM-NOT: system-header.h:1:12: warning:
+// CHECK-WITH-SYSTEM-DAG: system-header.h:1:12: warning: single-argument constructors must be marked explicit
+
+class A { A(int); };
+// CHECK-DEFAULT: :[[@LINE-1]]:11: warning: single-argument constructors must be marked explicit
+// CHECK-EMPTY: :[[@LINE-2]]:11: warning: single-argument constructors must be marked explicit
+// CHECK-EXPLICIT: :[[@LINE-3]]:11: warning: single-argument constructors must be marked explicit
+// CHECK-NO-SYSTEM: :[[@LINE-4]]:11: warning: single-argument constructors must be marked explicit
+// CHECK-WITH-SYSTEM: :[[@LINE-5]]:11: warning: single-argument constructors must be marked explicit
diff --git a/clang-tools-extra/test/clang-tidy/infrastructure/file-filter.cpp b/clang-tools-extra/test/clang-tidy/infrastructure/file-filter.cpp
@@ -66,7 +66,7 @@ class A { A(int); };
 // CHECK4-NOT: warning:
 // CHECK4-QUIET-NOT: warning:
 
-// CHECK: Use -header-filter=.* to display errors from all non-system headers.
+// CHECK: Use -header-filter=.* or leave it as default to display errors from all non-system headers.
 // CHECK-QUIET-NOT: Suppressed
 // CHECK2-QUIET-NOT: Suppressed
 // CHECK3: Use -header-filter=.* {{.*}}