Driver: Determine which compilation stages to run.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@66844 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Driver.cpp b/lib/Driver/Driver.cpp
index 4ceeb77..204436a 100644
--- a/lib/Driver/Driver.cpp
+++ b/lib/Driver/Driver.cpp
@@ -244,7 +244,9 @@
void Driver::BuildActions(ArgList &Args, ActionList &Actions) {
types::ID InputType = types::TY_INVALID;
Arg *InputTypeArg = 0;
-
+
+ // Start by constructing the list of inputs and their types.
+
llvm::SmallVector<std::pair<types::ID, const Arg*>, 16> Inputs;
for (ArgList::const_iterator it = Args.begin(), ie = Args.end();
it != ie; ++it) {
@@ -323,6 +325,46 @@
}
}
+ if (Inputs.empty()) {
+ Diag(clang::diag::err_drv_no_input_files);
+ return;
+ }
+
+ // Determine which compilation mode we are in. We look for options
+ // which affect the phase, starting with the earliest phases, and
+ // record which option we used to determine the final phase.
+ Arg *FinalPhaseOpt = 0;
+ PhaseOrder FinalPhase;
+
+ // -{E,M,MM} only run the preprocessor.
+ if ((FinalPhaseOpt = Args.getLastArg(options::OPT_E)) ||
+ (FinalPhaseOpt = Args.getLastArg(options::OPT_M)) ||
+ (FinalPhaseOpt = Args.getLastArg(options::OPT_MM))) {
+ FinalPhase = PreprocessPhaseOrder;
+
+ // -{-analyze,fsyntax-only,S} only run up to the compiler.
+ } else if ((FinalPhaseOpt = Args.getLastArg(options::OPT__analyze)) ||
+ (FinalPhaseOpt = Args.getLastArg(options::OPT_fsyntax_only)) ||
+ (FinalPhaseOpt = Args.getLastArg(options::OPT_S))) {
+ FinalPhase = CompilePhaseOrder;
+
+ // -c only runs up to the assembler.
+ } else if ((FinalPhaseOpt = Args.getLastArg(options::OPT_c))) {
+ FinalPhase = AssemblePhaseOrder;
+
+ // Otherwise do everything.
+ } else
+ FinalPhase = PostAssemblePhaseOrder;
+
+ if (FinalPhaseOpt)
+ FinalPhaseOpt->claim();
+
+ // Reject -Z* at the top level, these options should never have been
+ // exposed by gcc.
+ if (Arg *A = Args.getLastArg(options::OPT_Z))
+ Diag(clang::diag::err_drv_use_of_Z_option) << A->getValue(Args);
+
+ // FIXME: This is just debugging code.
for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
llvm::errs() << "input " << i << ": "
<< Inputs[i].second->getValue(Args) << "\n";