add frontend support for -fdata-sections and -ffunction-sections,
patch by Sylvere Teissier!
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101108 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/CodeGen/CodeGenOptions.h b/include/clang/CodeGen/CodeGenOptions.h
index 638ed51..51b9c57 100644
--- a/include/clang/CodeGen/CodeGenOptions.h
+++ b/include/clang/CodeGen/CodeGenOptions.h
@@ -32,6 +32,7 @@
unsigned CXAAtExit : 1; /// Use __cxa_atexit for calling destructors.
unsigned CXXCtorDtorAliases: 1; /// Emit complete ctors/dtors as linker
/// aliases to base ctors when possible.
+ unsigned DataSections : 1; /// Set when -fdata-sections is enabled
unsigned DebugInfo : 1; /// Should generate deubg info (-g).
unsigned DisableFPElim : 1; /// Set when -fomit-frame-pointer is enabled.
unsigned DisableLLVMOpts : 1; /// Don't run any optimizations, for use in
@@ -39,6 +40,7 @@
/// internal state before optimizations are
/// done.
unsigned DisableRedZone : 1; /// Set when -mno-red-zone is enabled.
+ unsigned FunctionSections : 1; /// Set when -ffunction-sections is enabled
unsigned MergeAllConstants : 1; /// Merge identical constants.
unsigned NoCommon : 1; /// Set when -fno-common or C++ is enabled.
unsigned NoImplicitFloat : 1; /// Set when -mno-implicit-float is enabled.
@@ -88,10 +90,12 @@
AsmVerbose = 0;
CXAAtExit = 1;
CXXCtorDtorAliases = 0;
+ DataSections = 0;
DebugInfo = 0;
DisableFPElim = 0;
DisableLLVMOpts = 0;
DisableRedZone = 0;
+ FunctionSections = 0;
MergeAllConstants = 1;
NoCommon = 0;
NoImplicitFloat = 0;
diff --git a/include/clang/Driver/CC1Options.td b/include/clang/Driver/CC1Options.td
index 74e9b86..542bde6 100644
--- a/include/clang/Driver/CC1Options.td
+++ b/include/clang/Driver/CC1Options.td
@@ -123,6 +123,10 @@
HelpText<"Do not emit code to make initialization of local statics thread safe">;
def fdump_vtable_layouts : Flag<"-fdump-vtable-layouts">,
HelpText<"Dump the layouts of all vtables that will be emitted in a translation unit">;
+def ffunction_sections : Flag<"-ffunction-sections">,
+ HelpText<"Place each function in its own section (ELF Only)">;
+def fdata_sections : Flag<"-fdata-sections">,
+ HelpText<"Place each data in its own section (ELF Only)">;
def masm_verbose : Flag<"-masm-verbose">,
HelpText<"Generate verbose assembly output">;
def mcode_model : Separate<"-mcode-model">,
diff --git a/lib/Frontend/CodeGenAction.cpp b/lib/Frontend/CodeGenAction.cpp
index 7ed702e..fdce211 100644
--- a/lib/Frontend/CodeGenAction.cpp
+++ b/lib/Frontend/CodeGenAction.cpp
@@ -261,6 +261,9 @@
TargetMachine::setAsmVerbosityDefault(CodeGenOpts.AsmVerbose);
+ TargetMachine::setFunctionSections(CodeGenOpts.FunctionSections);
+ TargetMachine::setDataSections (CodeGenOpts.DataSections);
+
// FIXME: Parse this earlier.
if (CodeGenOpts.RelocationModel == "static") {
TargetMachine::setRelocationModel(llvm::Reloc::Static);
diff --git a/lib/Frontend/CompilerInvocation.cpp b/lib/Frontend/CompilerInvocation.cpp
index 17007b0..b5e5645 100644
--- a/lib/Frontend/CompilerInvocation.cpp
+++ b/lib/Frontend/CompilerInvocation.cpp
@@ -148,6 +148,10 @@
// VerifyModule is only derived.
// Inlining is only derived.
+ if (Opts.DataSections)
+ Res.push_back("-fdata-sections");
+ if (Opts.FunctionSections)
+ Res.push_back("-ffunction-sections");
if (Opts.AsmVerbose)
Res.push_back("-masm-verbose");
if (!Opts.CodeModel.empty()) {
@@ -803,6 +807,9 @@
Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
Opts.RelocationModel = getLastArgValue(Args, OPT_mrelocation_model, "pic");
+ Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
+ Opts.DataSections = Args.hasArg(OPT_fdata_sections);
+
Opts.MainFileName = getLastArgValue(Args, OPT_main_file_name);
Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
}