Disable Subzero IR generation for performance testing.

src/llvm2ice.cpp

Index: src/llvm2ice.cpp
diff --git a/src/llvm2ice.cpp b/src/llvm2ice.cpp
index fd0cc30cddebedfba7d9f5b4eb3bec629b172ad1..05bfab73386b0058c6bb1057de706d8114a2cdf4 100644
--- a/src/llvm2ice.cpp
+++ b/src/llvm2ice.cpp
@@ -94,6 +94,8 @@ DisableInternal("externalize",
                 cl::desc("Externalize all symbols"));
 static cl::opt<bool>
 DisableTranslation("notranslate", cl::desc("Disable Subzero translation"));
+static cl::opt<bool>
+    DisableIRGeneration("noIRgen", cl::desc("Disable generating Subzero IR."));
 static cl::opt<std::string>
 TranslateOnly("translate-only", cl::desc("Translate only the given function"),
               cl::init(""));
@@ -228,6 +230,9 @@ int main(int argc, char **argv) {
 
   cl::ParseCommandLineOptions(argc, argv);
 

[jvoung (off chromium), 2014/11/04 22:30:15]

I wonder if there will be an easy way to compile-out the non-asserting
DisableIRGeneration checks that do bail outs, set nullptr, etc. for a minimal
build.  Can it be done by forcing DisableIRGeneration to false?

[Karl, 2014/11/05 21:13:34]

Done.

+  if (DisableIRGeneration)
+    DisableTranslation = true;
+
   Ice::VerboseMask VMask = Ice::IceV_None;
   for (unsigned i = 0; i != VerboseList.size(); ++i)
     VMask |= VerboseList[i];
@@ -269,6 +274,7 @@ int main(int argc, char **argv) {
   Flags.TimingFocusOn = TimingFocusOn;
   Flags.VerboseFocusOn = VerboseFocusOn;
   Flags.TranslateOnly = TranslateOnly;
+  Flags.DisableIRGeneration = DisableIRGeneration;
 
   Ice::GlobalContext Ctx(Ls, Os, VMask, TargetArch, OptLevel, TestPrefix,
                          Flags);