Add support for -Wa,--noexecstack when building from a non-assembly file. For

an assembly file it worked correctly, while for a .c file it would given an
error about how --noexecstack is not a supported argument to -Wa.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133489 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 7 insertions, 0 deletions

diff --git a/lib/CodeGen/BackendUtil.cpp b/lib/CodeGen/BackendUtil.cpp
index 01d15ff7f7..90aff7c1f9 100644
--- a/lib/CodeGen/BackendUtil.cpp
+++ b/lib/CodeGen/BackendUtil.cpp
@@ -275,6 +275,8 @@ bool EmitAssemblyHelper::AddEmitPasses(BackendAction Action,
     TM->setMCSaveTempLabels(true);
   if (CodeGenOpts.NoDwarf2CFIAsm)
     TM->setMCUseCFI(false);
+  if (CodeGenOpts.NoExecStack)
+    TM->setMCNoExecStack(true);
 
   // Create the code generator passes.
   PassManager *PM = getCodeGenPasses();
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 804094ba53..b3cef73e52 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -1051,6 +1051,8 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
         } else if (Value == "--fatal-warnings") {
           CmdArgs.push_back("-mllvm");
           CmdArgs.push_back("-fatal-assembler-warnings");
+        } else if (Value == "--noexecstack") {
+          CmdArgs.push_back("-mnoexecstack");
         } else {
           D.Diag(clang::diag::err_drv_unsupported_option_argument)
             << A->getOption().getName() << Value;
diff --git a/lib/Frontend/CompilerInvocation.cpp b/lib/Frontend/CompilerInvocation.cpp
index c9718c4d88..977f351e42 100644
--- a/lib/Frontend/CompilerInvocation.cpp
+++ b/lib/Frontend/CompilerInvocation.cpp
@@ -201,6 +201,8 @@ static void CodeGenOptsToArgs(const CodeGenOptions &Opts,
     Res.push_back("-mregparm");
     Res.push_back(llvm::utostr(Opts.NumRegisterParameters));
   }
+  if (Opts.NoExecStack)
+    Res.push_back("-mnoexecstack");
   if (Opts.RelaxAll)
     Res.push_back("-mrelax-all");
   if (Opts.SaveTempLabels)
@@ -982,6 +984,7 @@ static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
   Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
   Opts.NumRegisterParameters = Args.getLastArgIntValue(OPT_mregparm, 0, Diags);
+  Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
   Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
   Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
   Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);