[flags] Remove deprecated Hydrogen specific flags.

R=tebbi@chromium.org

Change-Id: I9d22e0731da3e170fe40aa34667ff8948e11bb5c
Reviewed-on: https://chromium-review.googlesource.com/595972Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47124}

src/d8.cc

@@ -3145,7 +3145,6 @@ int Shell::Main(int argc, char* argv[]) {
   } else {
     v8::V8::InitializeExternalStartupData(argv[0]);
   }
-  SetFlagsFromString("--trace-hydrogen-file=hydrogen.cfg");
   SetFlagsFromString("--trace-turbo-cfg-file=turbo.cfg");
   SetFlagsFromString("--redirect-code-traces-to=code.asm");
   int result = 0;

src/flag-definitions.h

@@ -339,7 +339,6 @@ DEFINE_STRING(trace_ignition_dispatches_output_file, nullptr,
               "written (by default, the table is not written to a file)")
 
 // Flags for Crankshaft.
-DEFINE_STRING(hydrogen_filter, "*", "optimization filter")
 DEFINE_BOOL(use_allocation_folding, true, "use allocation folding")
 DEFINE_BOOL(use_local_allocation_folding, false, "only fold in basic blocks")
 DEFINE_BOOL(use_write_barrier_elimination, true,
@@ -358,11 +357,6 @@ DEFINE_FLOAT(min_inlining_frequency, 0.15, "minimum frequency for inlining")
 DEFINE_BOOL(fast_math, true, "faster (but maybe less accurate) math functions")
 DEFINE_BOOL(trace_environment_liveness, false,
             "trace liveness of local variable slots")
-DEFINE_BOOL(trace_hydrogen, false, "trace generated hydrogen to file")
-DEFINE_STRING(trace_hydrogen_filter, "*", "hydrogen tracing filter")
-DEFINE_BOOL(trace_hydrogen_stubs, false, "trace generated hydrogen for stubs")
-DEFINE_STRING(trace_hydrogen_file, NULL, "trace hydrogen to given file name")
-DEFINE_STRING(trace_phase, "HLZ", "trace generated IR for specified phases")
 DEFINE_BOOL(trace_store_elimination, false, "trace store elimination")
 DEFINE_BOOL(turbo_verify_store_elimination, false,
             "verify store elimination more rigorously")

src/isolate.cc

@@ -2790,8 +2790,7 @@ bool Isolate::Init(StartupDeserializer* des) {
     set_event_logger(Logger::DefaultEventLoggerSentinel);
   }
 
-  if (FLAG_trace_hydrogen || FLAG_trace_hydrogen_stubs || FLAG_trace_turbo ||
-      FLAG_trace_turbo_graph) {
+  if (FLAG_trace_turbo || FLAG_trace_turbo_graph) {
     PrintF("Concurrent recompilation has been disabled for tracing.\n");
   } else if (OptimizingCompileDispatcher::Enabled()) {
     optimizing_compile_dispatcher_ = new OptimizingCompileDispatcher(this);

src/objects/shared-function-info.h

@@ -253,7 +253,7 @@ class SharedFunctionInfo : public HeapObject {
   // The function cannot cause any side effects.
   bool HasNoSideEffect();
 
-  // Used for flags such as --hydrogen-filter.
+  // Used for flags such as --turbo-filter.
   bool PassesFilter(const char* raw_filter);
 
   // Position of the 'function' token in the script source.

src/runtime-profiler.cc

@@ -135,8 +135,7 @@ static void GetICCounts(JSFunction* function, int* ic_with_type_info_count,
 
 static void TraceRecompile(JSFunction* function, const char* reason,
                            const char* type) {
-  if (FLAG_trace_opt &&
-      function->shared()->PassesFilter(FLAG_hydrogen_filter)) {
+  if (FLAG_trace_opt) {
     PrintF("[marking ");
     function->ShortPrint();
     PrintF(" for %s recompilation, reason: %s", type, reason);

test/debugger/debug/regress/regress-debug-code-recompilation.js

@@ -25,8 +25,6 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --hydrogen-filter=Debug.setBreakPoint
-
 Debug = debug.Debug
 Debug.setListener(function(){});