r178744 - Plumb through the -fsplit-stack option using the existing backend
Rafael Espíndola
rafael.espindola at gmail.com
Thu Apr 4 06:28:08 PDT 2013
Fixes pr14332?
On 4 April 2013 02:29, Eric Christopher <echristo at gmail.com> wrote:
> Author: echristo
> Date: Thu Apr 4 01:29:47 2013
> New Revision: 178744
>
> URL: http://llvm.org/viewvc/llvm-project?rev=178744&view=rev
> Log:
> Plumb through the -fsplit-stack option using the existing backend
> support.
>
> Caveat: Other than the existing segmented stacks support, no
> claims are made of this working.
>
> Modified:
> cfe/trunk/include/clang/Driver/CC1Options.td
> cfe/trunk/include/clang/Driver/Options.td
> cfe/trunk/include/clang/Frontend/CodeGenOptions.def
> cfe/trunk/lib/CodeGen/BackendUtil.cpp
> cfe/trunk/lib/Driver/Tools.cpp
> cfe/trunk/lib/Frontend/CompilerInvocation.cpp
> cfe/trunk/test/Driver/clang_f_opts.c
>
> Modified: cfe/trunk/include/clang/Driver/CC1Options.td
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/CC1Options.td?rev=178744&r1=178743&r2=178744&view=diff
> ==============================================================================
> --- cfe/trunk/include/clang/Driver/CC1Options.td (original)
> +++ cfe/trunk/include/clang/Driver/CC1Options.td Thu Apr 4 01:29:47 2013
> @@ -184,6 +184,8 @@ def mlimit_float_precision : Separate<["
> HelpText<"Limit float precision to the given value">;
> def mno_exec_stack : Flag<["-"], "mnoexecstack">,
> HelpText<"Mark the file as not needing an executable stack">;
> +def split_stacks : Flag<["-"], "split-stacks">,
> + HelpText<"Try to use a split stack if possible.">;
> def mno_zero_initialized_in_bss : Flag<["-"], "mno-zero-initialized-in-bss">,
> HelpText<"Do not put zero initialized data in the BSS">;
> def backend_option : Separate<["-"], "backend-option">,
>
> Modified: cfe/trunk/include/clang/Driver/Options.td
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/Options.td?rev=178744&r1=178743&r2=178744&view=diff
> ==============================================================================
> --- cfe/trunk/include/clang/Driver/Options.td (original)
> +++ cfe/trunk/include/clang/Driver/Options.td Thu Apr 4 01:29:47 2013
> @@ -675,6 +675,7 @@ def fshow_source_location : Flag<["-"],
> def fspell_checking : Flag<["-"], "fspell-checking">, Group<f_Group>;
> def fsigned_bitfields : Flag<["-"], "fsigned-bitfields">, Group<f_Group>;
> def fsigned_char : Flag<["-"], "fsigned-char">, Group<f_Group>;
> +def fsplit_stack : Flag<["-"], "fsplit-stack">, Group<f_Group>;
> def fstack_protector_all : Flag<["-"], "fstack-protector-all">, Group<f_Group>;
> def fstack_protector : Flag<["-"], "fstack-protector">, Group<f_Group>;
> def fstrict_aliasing : Flag<["-"], "fstrict-aliasing">, Group<f_Group>;
>
> Modified: cfe/trunk/include/clang/Frontend/CodeGenOptions.def
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Frontend/CodeGenOptions.def?rev=178744&r1=178743&r2=178744&view=diff
> ==============================================================================
> --- cfe/trunk/include/clang/Frontend/CodeGenOptions.def (original)
> +++ cfe/trunk/include/clang/Frontend/CodeGenOptions.def Thu Apr 4 01:29:47 2013
> @@ -70,6 +70,7 @@ CODEGENOPT(NoDwarf2CFIAsm , 1, 0) ///
> CODEGENOPT(NoDwarfDirectoryAsm , 1, 0) ///< Set when -fno-dwarf-directory-asm is
> ///< enabled.
> CODEGENOPT(NoExecStack , 1, 0) ///< Set when -Wa,--noexecstack is enabled.
> +CODEGENOPT(EnableSegmentedStacks , 1, 0) ///< Set when -fsplit-stack is enabled.
> CODEGENOPT(NoGlobalMerge , 1, 0) ///< Set when -mno-global-merge is enabled.
> CODEGENOPT(NoImplicitFloat , 1, 0) ///< Set when -mno-implicit-float is enabled.
> CODEGENOPT(NoInfsFPMath , 1, 0) ///< Assume FP arguments, results not +-Inf.
>
> Modified: cfe/trunk/lib/CodeGen/BackendUtil.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/BackendUtil.cpp?rev=178744&r1=178743&r2=178744&view=diff
> ==============================================================================
> --- cfe/trunk/lib/CodeGen/BackendUtil.cpp (original)
> +++ cfe/trunk/lib/CodeGen/BackendUtil.cpp Thu Apr 4 01:29:47 2013
> @@ -457,6 +457,7 @@ TargetMachine *EmitAssemblyHelper::Creat
> Options.TrapFuncName = CodeGenOpts.TrapFuncName;
> Options.PositionIndependentExecutable = LangOpts.PIELevel != 0;
> Options.SSPBufferSize = CodeGenOpts.SSPBufferSize;
> + Options.EnableSegmentedStacks = CodeGenOpts.EnableSegmentedStacks;
>
> TargetMachine *TM = TheTarget->createTargetMachine(Triple, TargetOpts.CPU,
> FeaturesStr, Options,
>
> Modified: cfe/trunk/lib/Driver/Tools.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Tools.cpp?rev=178744&r1=178743&r2=178744&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Driver/Tools.cpp (original)
> +++ cfe/trunk/lib/Driver/Tools.cpp Thu Apr 4 01:29:47 2013
> @@ -2112,6 +2112,10 @@ void Clang::ConstructJob(Compilation &C,
> options::OPT_fno_optimize_sibling_calls))
> CmdArgs.push_back("-mdisable-tail-calls");
>
> + // Handle segmented stacks.
> + if (Args.hasArg(options::OPT_fsplit_stack))
> + CmdArgs.push_back("-split-stacks");
> +
> // Handle various floating point optimization flags, mapping them to the
> // appropriate LLVM code generation flags. The pattern for all of these is to
> // default off the codegen optimizations, and if any flag enables them and no
>
> Modified: cfe/trunk/lib/Frontend/CompilerInvocation.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/CompilerInvocation.cpp?rev=178744&r1=178743&r2=178744&view=diff
> ==============================================================================
> --- cfe/trunk/lib/Frontend/CompilerInvocation.cpp (original)
> +++ cfe/trunk/lib/Frontend/CompilerInvocation.cpp Thu Apr 4 01:29:47 2013
> @@ -358,6 +358,7 @@ static bool ParseCodeGenArgs(CodeGenOpti
> Opts.NumRegisterParameters = Args.getLastArgIntValue(OPT_mregparm, 0, Diags);
> Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
> Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
> + Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
> Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
> Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
> Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels);
>
> Modified: cfe/trunk/test/Driver/clang_f_opts.c
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Driver/clang_f_opts.c?rev=178744&r1=178743&r2=178744&view=diff
> ==============================================================================
> --- cfe/trunk/test/Driver/clang_f_opts.c (original)
> +++ cfe/trunk/test/Driver/clang_f_opts.c Thu Apr 4 01:29:47 2013
> @@ -1,6 +1,7 @@
> -// RUN: %clang -### -S -fasm -fblocks -fbuiltin -fno-math-errno -fcommon -fpascal-strings -fno-blocks -fno-builtin -fmath-errno -fno-common -fno-pascal-strings -fblocks -fbuiltin -fmath-errno -fcommon -fpascal-strings %s 2>&1 | FileCheck -check-prefix=CHECK-OPTIONS1 %s
> +// RUN: %clang -### -S -fasm -fblocks -fbuiltin -fno-math-errno -fcommon -fpascal-strings -fno-blocks -fno-builtin -fmath-errno -fno-common -fno-pascal-strings -fblocks -fbuiltin -fmath-errno -fcommon -fpascal-strings -fsplit-stack %s 2>&1 | FileCheck -check-prefix=CHECK-OPTIONS1 %s
> // RUN: %clang -### -S -fasm -fblocks -fbuiltin -fno-math-errno -fcommon -fpascal-strings -fno-asm -fno-blocks -fno-builtin -fmath-errno -fno-common -fno-pascal-strings -fno-show-source-location -fshort-enums -fshort-wchar %s 2>&1 | FileCheck -check-prefix=CHECK-OPTIONS2 %s
>
> +// CHECK-OPTIONS1: -split-stacks
> // CHECK-OPTIONS1: -fgnu-keywords
> // CHECK-OPTIONS1: -fblocks
> // CHECK-OPTIONS1: -fpascal-strings
>
>
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