Embed bitcode in object file (clang cc1 part)
Summary:
Teach clang to embed bitcode inside bitcode. When -fembed-bitcode cc1
option is used, clang will embed both the input bitcode and cc1
commandline into the bitcode in special sections before compiling to
the object file. Using -fembed-bitcode-marker will only introduce a
marker in both sections.
Depends on D17390
Reviewers: rsmith
Subscribers: yaron.keren, vsk, cfe-commits
Differential Revision: http://reviews.llvm.org/D17392
llvm-svn: 269202
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index a97dc92..f11188d 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -634,6 +634,45 @@
}
}
}
+ // Handle -fembed-bitcode option.
+ if (Arg *A = Args.getLastArg(OPT_fembed_bitcode_EQ)) {
+ StringRef Name = A->getValue();
+ unsigned Model = llvm::StringSwitch<unsigned>(Name)
+ .Case("off", CodeGenOptions::Embed_Off)
+ .Case("all", CodeGenOptions::Embed_All)
+ .Case("bitcode", CodeGenOptions::Embed_Bitcode)
+ .Case("marker", CodeGenOptions::Embed_Marker)
+ .Default(~0U);
+ if (Model == ~0U) {
+ Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Name;
+ Success = false;
+ } else
+ Opts.setEmbedBitcode(
+ static_cast<CodeGenOptions::EmbedBitcodeKind>(Model));
+ }
+ // FIXME: For backend options that are not yet recorded as function
+ // attributes in the IR, keep track of them so we can embed them in a
+ // separate data section and use them when building the bitcode.
+ if (Opts.getEmbedBitcode() == CodeGenOptions::Embed_All) {
+ for (const auto &A : Args) {
+ // Do not encode output and input.
+ if (A->getOption().getID() == options::OPT_o ||
+ A->getOption().getID() == options::OPT_INPUT ||
+ A->getOption().getID() == options::OPT_x ||
+ A->getOption().getID() == options::OPT_fembed_bitcode ||
+ (A->getOption().getGroup().isValid() &&
+ A->getOption().getGroup().getID() == options::OPT_W_Group))
+ continue;
+ ArgStringList ASL;
+ A->render(Args, ASL);
+ for (const auto &arg : ASL) {
+ StringRef ArgStr(arg);
+ Opts.CmdArgs.insert(Opts.CmdArgs.end(), ArgStr.begin(), ArgStr.end());
+ // using \00 to seperate each commandline options.
+ Opts.CmdArgs.push_back('\0');
+ }
+ }
+ }
Opts.InstrumentFunctions = Args.hasArg(OPT_finstrument_functions);
Opts.InstrumentForProfiling = Args.hasArg(OPT_pg);