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Debugging on SIL level.

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This change follows up on an idea from Michael (thanks!).
It enables debugging and profiling on SIL level, which is useful for compiler debugging.

There is a new frontend option -gsil which lets the compiler write a SIL file and generated debug info for it.
For details see docs/DebuggingTheCompiler.rst and the comments in SILDebugInfoGenerator.cpp.
This commit is contained in:
Erik Eckstein
2016-03-18 14:02:06 -07:00
parent 8f78085e8b
commit 6d654aa3e8
10 changed files with 239 additions and 6 deletions
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21
lib/Frontend/CompilerInvocation.cpp
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@@ -1071,6 +1071,16 @@ static bool ParseSILArgs(SILOptions &Opts, ArgList &Args,
Opts.EnableGuaranteedClosureContexts |=
Args.hasArg(OPT_enable_guaranteed_closure_contexts);
if (Args.hasArg(OPT_debug_on_sil)) {
// Derive the name of the SIL file for debugging from
// the regular outputfile.
StringRef BaseName = FEOpts.getSingleOutputFilename();
// If there are no or multiple outputfiles, derive the name
// from the module name.
if (BaseName.empty())
BaseName = FEOpts.ModuleName;
Opts.SILOutputFileNameForDebugging = BaseName.str();
}
return false;
}
@@ -1107,12 +1117,15 @@ void CompilerInvocation::buildDWARFDebugFlags(std::string &Output,
static bool ParseIRGenArgs(IRGenOptions &Opts, ArgList &Args,
DiagnosticEngine &Diags,
const FrontendOptions &FrontendOpts,
const SILOptions &SILOpts,
StringRef SDKPath,
StringRef ResourceDir,
const llvm::Triple &Triple) {
using namespace options;
if (const Arg *A = Args.getLastArg(OPT_g_Group)) {
if (!SILOpts.SILOutputFileNameForDebugging.empty()) {
Opts.DebugInfoKind = IRGenDebugInfoKind::LineTables;
} else if (const Arg *A = Args.getLastArg(OPT_g_Group)) {
if (A->getOption().matches(OPT_g))
Opts.DebugInfoKind = IRGenDebugInfoKind::Normal;
else if (A->getOption().matches(options::OPT_gline_tables_only))
@@ -1178,7 +1191,9 @@ static bool ParseIRGenArgs(IRGenOptions &Opts, ArgList &Args,
// TODO: investigate whether these should be removed, in favor of definitions
// in other classes.
if (FrontendOpts.PrimaryInput && FrontendOpts.PrimaryInput->isFilename()) {
if (!SILOpts.SILOutputFileNameForDebugging.empty()) {
Opts.MainInputFilename = SILOpts.SILOutputFileNameForDebugging;
} else if (FrontendOpts.PrimaryInput && FrontendOpts.PrimaryInput->isFilename()) {
unsigned Index = FrontendOpts.PrimaryInput->Index;
Opts.MainInputFilename = FrontendOpts.InputFilenames[Index];
} else if (FrontendOpts.InputFilenames.size() == 1) {
@@ -1310,7 +1325,7 @@ bool CompilerInvocation::parseArgs(ArrayRef<const char *> Args,
return true;
}
if (ParseIRGenArgs(IRGenOpts, ParsedArgs, Diags, FrontendOpts,
if (ParseIRGenArgs(IRGenOpts, ParsedArgs, Diags, FrontendOpts, SILOpts,
getSDKPath(), SearchPathOpts.RuntimeResourcePath,
LangOpts.Target)) {
return true;