Add --trace-hydrogen-filter flag.

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index 0460da1d089c6c79478bb6b64782a6dbfdc082fa..19f705450d30eec24207870381451a5f527a21ec 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -362,7 +362,7 @@ OptimizingCompiler::Status OptimizingCompiler::CreateGraph() {
   }
 
   // Take --hydrogen-filter into account.
-  if (!info()->closure()->PassesHydrogenFilter()) {
+  if (!info()->closure()->PassesFilter(FLAG_hydrogen_filter)) {
     info()->AbortOptimization();
     return SetLastStatus(BAILED_OUT);
   }
@@ -1258,9 +1258,10 @@ CompilationPhase::~CompilationPhase() {
 bool CompilationPhase::ShouldProduceTraceOutput() const {
   // Trace if the appropriate trace flag is set and the phase name's first
   // character is in the FLAG_trace_phase command line parameter.
-  bool tracing_on = info()->IsStub() ?
-      FLAG_trace_hydrogen_stubs :
-      FLAG_trace_hydrogen;
+  bool tracing_on = info()->IsStub()
+      ? FLAG_trace_hydrogen_stubs
+      : (FLAG_trace_hydrogen &&
+         info()->closure()->PassesFilter(FLAG_trace_hydrogen_filter));

[Michael Starzinger, 2013/08/26 18:00:00]

This breaks --trace-hydrogen in debug mode with --enable-slow-asserts ...

#
# Fatal error in ../src/handles-inl.h, line 69
# CHECK(!FLAG_enable_slow_asserts ||
(IsDereferenceAllowed(INCLUDE_DEFERRED_CHECK))) failed
#

#14 0x083c5d16 in v8::internal::CompilationPhase::ShouldProduceTraceOutput
(this=0xffffca24) at ../src/compiler.cc:1268
#15 0x084db967 in v8::internal::HPhase::~HPhase (this=0xffffca24,
__in_chrg=<optimized out>) at ../src/hydrogen.cc:9849
#16 0x084bb15d in v8::internal::HGraph::AssignDominators (this=0x8abecc0) at
../src/hydrogen.cc:2448
#17 0x084bcd76 in v8::internal::HGraph::Optimize (this=0x8abecc0,
bailout_reason=0xffffcadc) at ../src/hydrogen.cc:2920
#18 0x083c26f2 in v8::internal::OptimizingCompiler::OptimizeGraph
(this=0xffffcb00) at ../src/compiler.cc:463
#19 0x083c1c80 in v8::internal::MakeCrankshaftCode (info=0xffffcc24) at
../src/compiler.cc:303

   return (tracing_on &&
       OS::StrChr(const_cast<char*>(FLAG_trace_phase), name_[0]) != NULL);
 }