[GMR] Turn on GMR by default in non-LTO pipelines

[jmolloy]

Summary

This has been talked about for a while on the list. Now that most passes are fixed not to invalidate GMR, it's actually useful and has shown nontrivial benefits on our benchmarking. It's also useful to get this more widely tested.

[jmolloy]

This was committed.

lib/Transforms/IPO/PassManagerBuilder.cpp

static cl::opt<bool> EnableLoopInterchange(
     "enable-loopinterchange", cl::init(false), cl::Hidden,
     cl::desc("Enable the new, experimental LoopInterchange Pass"));
 
 static cl::opt<bool> EnableLoopDistribute(
     "enable-loop-distribute", cl::init(false), cl::Hidden,
     cl::desc("Enable the new, experimental LoopDistribution Pass"));
 
 static cl::opt<bool> EnableNonLTOGlobalsModRef(
-    "enable-non-lto-gmr", cl::init(false), cl::Hidden,
+    "enable-non-lto-gmr", cl::init(true), cl::Hidden,
     cl::desc(
         "Enable the GlobalsModRef AliasAnalysis outside of the LTO pipeline."));
 
 PassManagerBuilder::PassManagerBuilder() {
     OptLevel = 2;
     SizeLevel = 0;
     LibraryInfo = nullptr;
     Inliner = nullptr;