[cfe-commits] r130725 - in /cfe/trunk: include/clang/Driver/CC1Options.td include/clang/Driver/Options.td lib/Driver/Tools.cpp

[Eric Christopher]

Author: echristo
Date: Mon May  2 16:18:22 2011
New Revision: 130725

URL: http://llvm.org/viewvc/llvm-project?rev=130725&view=rev
Log:
Add the -mstackrealign option which just communicates the need to
force align the stack to the backend.

Fixes rdar://9289631

Modified:
    cfe/trunk/include/clang/Driver/CC1Options.td
    cfe/trunk/include/clang/Driver/Options.td
    cfe/trunk/lib/Driver/Tools.cpp

Modified: cfe/trunk/include/clang/Driver/CC1Options.td
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/CC1Options.td?rev=130725&r1=130724&r2=130725&view=diff
==============================================================================
--- cfe/trunk/include/clang/Driver/CC1Options.td (original)
+++ cfe/trunk/include/clang/Driver/CC1Options.td Mon May  2 16:18:22 2011
@@ -178,6 +178,8 @@
   HelpText<"Emit complete constructors and destructors as aliases when possible">;
 def mms_bitfields : Flag<"-mms-bitfields">,
   HelpText<"Set the default structure layout to be compatible with the Microsoft compiler standard.">;
+def mstackrealign : Flag<"-mstackrealign">,
+  HelpText<"Force realign the stack at entry to every function.">;
 def O : Joined<"-O">, HelpText<"Optimization level">;
 def Os : Flag<"-Os">, HelpText<"Optimize for size">;
 def Oz : Flag<"-Oz">, HelpText<"Optimize for size, regardless of performance">;

Modified: cfe/trunk/include/clang/Driver/Options.td
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/Options.td?rev=130725&r1=130724&r2=130725&view=diff
==============================================================================
--- cfe/trunk/include/clang/Driver/Options.td (original)
+++ cfe/trunk/include/clang/Driver/Options.td Mon May  2 16:18:22 2011
@@ -513,6 +513,7 @@
 def mllvm : Separate<"-mllvm">;
 def mmacosx_version_min_EQ : Joined<"-mmacosx-version-min=">, Group<m_Group>;
 def mms_bitfields : Flag<"-mms-bitfields">, Group<m_Group>;
+def mstackrealign : Flag<"-mstackrealign">, Group<m_Group>;
 def mmmx : Flag<"-mmmx">, Group<m_x86_Features_Group>;
 def mno_3dnowa : Flag<"-mno-3dnowa">, Group<m_x86_Features_Group>;
 def mno_3dnow : Flag<"-mno-3dnow">, Group<m_x86_Features_Group>;

Modified: cfe/trunk/lib/Driver/Tools.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Tools.cpp?rev=130725&r1=130724&r2=130725&view=diff
==============================================================================
--- cfe/trunk/lib/Driver/Tools.cpp (original)
+++ cfe/trunk/lib/Driver/Tools.cpp Mon May  2 16:18:22 2011
@@ -1546,6 +1546,12 @@
     CmdArgs.push_back(Args.MakeArgString(llvm::Twine(StackProtectorLevel)));
   }
 
+  // Translate -mstackrealign
+  if (Args.hasArg(options::OPT_mstackrealign)) {
+    CmdArgs.push_back("-backend-option");
+    CmdArgs.push_back("-force-align-stack");
+  }
+  
   // Forward -f options with positive and negative forms; we translate
   // these by hand.