[clang] [clang] Support -Wa, options -mmsa and -mno-msa (PR #99615)

[via cfe-commits]

https://github.com/yingopq updated https://github.com/llvm/llvm-project/pull/99615

>From 1bdf55ea96e212febc7e51720bfbf52a3bdc677c Mon Sep 17 00:00:00 2001
From: Ying Huang <ying.huang at oss.cipunited.com>
Date: Fri, 19 Jul 2024 04:19:09 -0400
Subject: [PATCH] [clang] Support -Wa, options -mmsa and -mno-msa

---
 clang/include/clang/Basic/CodeGenOptions.def | 1 +
 clang/include/clang/Driver/Options.td        | 4 +++-
 clang/lib/Driver/ToolChains/Clang.cpp        | 7 +++++++
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/clang/include/clang/Basic/CodeGenOptions.def b/clang/include/clang/Basic/CodeGenOptions.def
index f671b780bcbeb..4a834ea78eeb4 100644
--- a/clang/include/clang/Basic/CodeGenOptions.def
+++ b/clang/include/clang/Basic/CodeGenOptions.def
@@ -178,6 +178,7 @@ CODEGENOPT(MergeAllConstants , 1, 1) ///< Merge identical constants.
 CODEGENOPT(MergeFunctions    , 1, 0) ///< Set when -fmerge-functions is enabled.
 CODEGENOPT(NoCommon          , 1, 0) ///< Set when -fno-common or C++ is enabled.
 CODEGENOPT(NoExecStack       , 1, 0) ///< Set when -Wa,--noexecstack is enabled.
+CODEGENOPT(Msa               , 1, 0) ///< Set when -Wa,-mmsa is enabled.
 CODEGENOPT(FatalWarnings     , 1, 0) ///< Set when -Wa,--fatal-warnings is
                                      ///< enabled.
 CODEGENOPT(NoWarn            , 1, 0) ///< Set when -Wa,--no-warn is enabled.
diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index 12b20fe04675b..a66ea0ce487f2 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -5337,7 +5337,9 @@ def mmadd4 : Flag<["-"], "mmadd4">, Group<m_mips_Features_Group>,
 def mno_madd4 : Flag<["-"], "mno-madd4">, Group<m_mips_Features_Group>,
   HelpText<"Disable the generation of 4-operand madd.s, madd.d and related instructions.">;
 def mmsa : Flag<["-"], "mmsa">, Group<m_mips_Features_Group>,
-  HelpText<"Enable MSA ASE (MIPS only)">;
+  Visibility<[ClangOption, CC1AsOption]>,
+  HelpText<"Enable MSA ASE (MIPS only)">,
+  MarshallingInfoFlag<CodeGenOpts<"Msa">>;
 def mno_msa : Flag<["-"], "mno-msa">, Group<m_mips_Features_Group>,
   HelpText<"Disable MSA ASE (MIPS only)">;
 def mmt : Flag<["-"], "mmt">, Group<m_mips_Features_Group>,
diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
index 1fd6fba210042..560f3bd4a67ae 100644
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -2507,6 +2507,7 @@ static void CollectArgsForIntegratedAssembler(Compilation &C,
   bool Crel = false, ExperimentalCrel = false;
   bool UseRelaxRelocations = C.getDefaultToolChain().useRelaxRelocations();
   bool UseNoExecStack = false;
+  bool Msa = false;
   const char *MipsTargetFeature = nullptr;
   StringRef ImplicitIt;
   for (const Arg *A :
@@ -2630,6 +2631,10 @@ static void CollectArgsForIntegratedAssembler(Compilation &C,
         CmdArgs.push_back("-massembler-no-warn");
       } else if (Value == "--noexecstack") {
         UseNoExecStack = true;
+      } else if (Value == "-mmsa") {
+        Msa = true;
+      } else if (Value == "-mno-msa") {
+        Msa = false;
       } else if (Value.starts_with("-compress-debug-sections") ||
                  Value.starts_with("--compress-debug-sections") ||
                  Value == "-nocompress-debug-sections" ||
@@ -2716,6 +2721,8 @@ static void CollectArgsForIntegratedAssembler(Compilation &C,
           << "-Wa,--crel" << D.getTargetTriple();
     }
   }
+  if (Msa)
+    CmdArgs.push_back("-mmsa");
   if (!UseRelaxRelocations)
     CmdArgs.push_back("-mrelax-relocations=no");
   if (UseNoExecStack)