Subzero. Outputs liveness memory usage.

src/IceGlobalContext.cpp

 //===- subzero/src/IceGlobalContext.cpp - Global context defs -------------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 240 matching lines @@
   OstreamLocker _(Ctx);
   Ostream &Str = Ctx->getStrDump();
   const std::string Name =
       (Func == nullptr ? "_FINAL_" : Func->getFunctionNameAndSize());
 #define X(str, tag)                                                            \
   Str << "|" << Name << "|" str "|" << Stats[CS_##tag] << "\n";
   CODESTATS_TABLE
 #undef X
   Str << "|" << Name << "|Spills+Fills|"
       << Stats[CS_NumSpills] + Stats[CS_NumFills] << "\n";
-  Str << "|" << Name << "|Memory Usage|";
-  if (ssize_t MemUsed = llvm::TimeRecord::getCurrentTime(false).getMemUsed())
-    Str << MemUsed;
-  else
+  Str << "|" << Name << "|Memory Usage     |";
+  if (ssize_t MemUsed = llvm::TimeRecord::getCurrentTime(false).getMemUsed()) {
+    static constexpr size_t _1MB = 1024 * 1024;

[Jim Stichnoth, 2016/04/01 15:22:34]

So this got me thinking, why were we seeing seeing negative numbers here with
that big example?  sizeof(size_t) and sizeof(ssize_t) should be 64-bit on the
native x86-64 platform.  Maybe some mis-typing in the underlying mallopt or
whatever library?

In any case, what do you think about casting the getMemUsed() result to size_t?

[John, 2016/04/01 18:05:51]

Done.

+    Str << (MemUsed / _1MB) << " MB";
+  } else {
     Str << "(requires '-track-memory')";
+  }
   Str << "\n";
   Str << "|" << Name << "|CPool Sizes ";
   {
     auto Pool = Ctx->getConstPool();
     Str << "|f32=" << Pool->Floats.size();
     Str << "|f64=" << Pool->Doubles.size();
     Str << "|i1=" << Pool->Integers1.size();
     Str << "|i8=" << Pool->Integers8.size();
     Str << "|i16=" << Pool->Integers16.size();
     Str << "|i32=" << Pool->Integers32.size();
     Str << "|i64=" << Pool->Integers64.size();
     Str << "|Rel=" << Pool->Relocatables.size();
     Str << "|ExtRel=" << Pool->ExternRelocatables.size();
   }
   Str << "\n";
   if (Func != nullptr) {
-    Str << "|" << Name << "|Cfg Memory  |" << Func->getTotalMemoryMB()
+    Str << "|" << Name << "|Cfg Memory       |" << Func->getTotalMemoryMB()
+        << " MB\n";
+    Str << "|" << Name << "|Liveness Memory  |" << Func->getLivenessMemoryMB()
         << " MB\n";
   }
 }
 
 GlobalContext::GlobalContext(Ostream *OsDump, Ostream *OsEmit, Ostream *OsError,
                              ELFStreamer *ELFStr)
     : Strings(new StringPool()), ConstPool(new ConstantPool()), ErrorStatus(),
       StrDump(OsDump), StrEmit(OsEmit), StrError(OsError), IntrinsicsInfo(this),
       ObjectWriter(),
       OptQ(/*Sequential=*/Flags.isSequential(),
@@ skipping 712 matching lines @@
   Ctx = Func->getContext();
   Active =
       Func->getFocusedTiming() || Ctx->getFlags().getSubzeroTimingEnabled();
   if (Active)
     Ctx->pushTimer(ID, StackID);
 }
 
 ICE_TLS_DEFINE_FIELD(GlobalContext::ThreadContext *, GlobalContext, TLS);
 
 } // end of namespace Ice