clang-cl: Make /W4 imply -Wall -Wextra (PR25563)

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@253582 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/docs/UsersManual.rst b/docs/UsersManual.rst
index b50989471dae40b31c10764f42e34783b008e81c..ca2be4b46e8a39dd9a16332d2ed557257b0f82e9 100644 (file)
--- a/docs/UsersManual.rst
+++ b/docs/UsersManual.rst
@@ -2173,7 +2173,7 @@ Execute ``clang-cl /?`` to see a list of supported options:
       /W1                    Enable -Wall
       /W2                    Enable -Wall
       /W3                    Enable -Wall
-      /W4                    Enable -Wall
+      /W4                    Enable -Wall and -Wextra
       /Wall                  Enable -Wall
       /WX-                   Do not treat warnings as errors
       /WX                    Treat warnings as errors

diff --git a/include/clang/Driver/CLCompatOptions.td b/include/clang/Driver/CLCompatOptions.td
index a8282b46e0586711929fc381b1a7b16a816d48c4..e1590eede78a32bba9ebc9b728fec9117d46260c 100644 (file)
--- a/include/clang/Driver/CLCompatOptions.td
+++ b/include/clang/Driver/CLCompatOptions.td
@@ -115,12 +115,12 @@ def _SLASH_showIncludes : CLFlag<"showIncludes">,
   Alias<show_includes>;
 def _SLASH_U : CLJoinedOrSeparate<"U">, HelpText<"Undefine macro">,
   MetaVarName<"<macro>">, Alias<U>;
-def _SLASH_W0 : CLFlag<"W0">, HelpText<"Disable all warnings">, Alias<w>;
-def _SLASH_W1 : CLFlag<"W1">, HelpText<"Enable -Wall">, Alias<Wall>;
-def _SLASH_W2 : CLFlag<"W2">, HelpText<"Enable -Wall">, Alias<Wall>;
-def _SLASH_W3 : CLFlag<"W3">, HelpText<"Enable -Wall">, Alias<Wall>;
-def _SLASH_W4 : CLFlag<"W4">, HelpText<"Enable -Wall">, Alias<Wall>;
-def _SLASH_Wall : CLFlag<"Wall">, HelpText<"Enable -Wall">, Alias<Wall>;
+def _SLASH_W0 : CLFlag<"W0">, HelpText<"Disable all warnings">;
+def _SLASH_W1 : CLFlag<"W1">, HelpText<"Enable -Wall">;
+def _SLASH_W2 : CLFlag<"W2">, HelpText<"Enable -Wall">;
+def _SLASH_W3 : CLFlag<"W3">, HelpText<"Enable -Wall">;
+def _SLASH_W4 : CLFlag<"W4">, HelpText<"Enable -Wall and -Wextra">;
+def _SLASH_Wall : CLFlag<"Wall">, HelpText<"Enable -Wall">;
 def _SLASH_WX : CLFlag<"WX">, HelpText<"Treat warnings as errors">,
   Alias<W_Joined>, AliasArgs<["error"]>;
 def _SLASH_WX_ : CLFlag<"WX-">, HelpText<"Do not treat warnings as errors">,

diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index d6a3a1f482dea693b2c5a12ef18855962aaf6a4f..1212b2bcb7708167dbcb4f35a4eb1abdb95abfe8 100644 (file)
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -5684,6 +5684,26 @@ void Clang::AddClangCLArgs(const ArgList &Args, ArgStringList &CmdArgs,
     else
       CmdArgs.push_back("msvc");
   }
+
+  if (Arg *A =
+          Args.getLastArg(options::OPT__SLASH_W0, options::OPT__SLASH_W1,
+                          options::OPT__SLASH_W2, options::OPT__SLASH_W3,
+                          options::OPT__SLASH_W4, options::OPT__SLASH_Wall)) {
+    switch (A->getOption().getID()) {
+    case options::OPT__SLASH_W0:
+      CmdArgs.push_back("-w");
+      break;
+    case options::OPT__SLASH_W4:
+      CmdArgs.push_back("-Wextra");
+      // Fallthrough.
+    case options::OPT__SLASH_W1:
+    case options::OPT__SLASH_W2:
+    case options::OPT__SLASH_W3:
+    case options::OPT__SLASH_Wall:
+      CmdArgs.push_back("-Wall");
+      break;
+    }
+  }
 }
 
 visualstudio::Compiler *Clang::getCLFallback() const {

diff --git a/test/Driver/cl-options.c b/test/Driver/cl-options.c
index 180b15ead391d229fb53580f0fc16a5d8413c31d..c21d104ad991d83349a211af242b4e46d11debd8 100644 (file)
--- a/test/Driver/cl-options.c
+++ b/test/Driver/cl-options.c
@@ -173,10 +173,15 @@
 // RUN: %clang_cl /W1 -### -- %s 2>&1 | FileCheck -check-prefix=W1 %s
 // RUN: %clang_cl /W2 -### -- %s 2>&1 | FileCheck -check-prefix=W1 %s
 // RUN: %clang_cl /W3 -### -- %s 2>&1 | FileCheck -check-prefix=W1 %s
-// RUN: %clang_cl /W4 -### -- %s 2>&1 | FileCheck -check-prefix=W1 %s
 // RUN: %clang_cl /Wall -### -- %s 2>&1 | FileCheck -check-prefix=W1 %s
 // W1: -Wall
 
+// RUN: %clang_cl /W4 -### -- %s 2>&1 | FileCheck -check-prefix=W4 %s
+// W4: -Wextra
+// W4: -Wall
+// RUN: %clang_cl /W4 /W1 -### -- %s 2>&1 | FileCheck -check-prefix=W4W1 %s
+// W4W1-NOT: -Wextra
+
 // RUN: %clang_cl /WX -### -- %s 2>&1 | FileCheck -check-prefix=WX %s
 // WX: -Werror