Subzero: Add a few performance measurement tools.

src/llvm2ice.cpp

Index: src/llvm2ice.cpp
diff --git a/src/llvm2ice.cpp b/src/llvm2ice.cpp
index f95c02eef428d02cd39c3d939639007df7096b23..c3ffbbfba069717e15be6405fda24c4d7b7be997 100644
--- a/src/llvm2ice.cpp
+++ b/src/llvm2ice.cpp
@@ -95,8 +95,22 @@ static cl::opt<bool> SubzeroTimingEnabled(
     "timing", cl::desc("Enable breakdown timing of Subzero translation"));
 
 static cl::opt<bool>
-    DisableGlobals("disable-globals",
-                   cl::desc("Disable global initializer translation"));
+TimeEachFunction("timing-funcs",
+                 cl::desc("Print total translation time for each function"));
+
+static cl::opt<std::string> TimingFocusOn(
+    "timing-focus",
+    cl::desc("Break down timing for a specific function (use '*' for all)"),
+    cl::init(""));
+
+static cl::opt<std::string> VerboseFocusOn(
+    "verbose-focus",
+    cl::desc("Temporarily enable full verbosity for a specific function"),
+    cl::init(""));
+
+static cl::opt<bool>
+DisableGlobals("disable-globals",
+               cl::desc("Disable global initializer translation"));
 
 // This is currently unused, and is a placeholder for lit tests.
 static cl::opt<bool>
@@ -169,8 +183,11 @@ int main(int argc, char **argv) {
   Flags.UseIntegratedAssembler = UseIntegratedAssembler;
   Flags.UseSandboxing = UseSandboxing;
   Flags.DumpStats = DumpStats;
+  Flags.TimeEachFunction = TimeEachFunction;
   Flags.DefaultGlobalPrefix = DefaultGlobalPrefix;
   Flags.DefaultFunctionPrefix = DefaultFunctionPrefix;
+  Flags.TimingFocusOn = TimingFocusOn;
+  Flags.VerboseFocusOn = VerboseFocusOn;
 
   Ice::GlobalContext Ctx(Ls, Os, VMask, TargetArch, OptLevel, TestPrefix,
                          Flags);
@@ -199,6 +216,10 @@ int main(int argc, char **argv) {
     Converter.convertToIce();
     ErrorStatus = Converter.getErrorStatus();
   }
+  if (TimeEachFunction) {
+    const bool DumpCumulative = false;
+    Ctx.dumpTimers(Ice::GlobalContext::TSK_Funcs, DumpCumulative);
+  }
   if (SubzeroTimingEnabled)
     Ctx.dumpTimers();
   const bool FinalStats = true;