swift234

SIL Optimizer: Fix pre-specialization [fragile] mismatch assert

Applying this patch triggered an assert while building libswiftOnoneSupport:

--- a/lib/SILOptimizer/PassManager/Passes.cpp
+++ b/lib/SILOptimizer/PassManager/Passes.cpp
@@ -283,6 +283,9 @@ void swift::runSILOptimizationPasses(SILModule &Module) {
   PM.setStageName("HighLevel+EarlyLoopOpt");
   // FIXME: update this to be a function pass.
   PM.addEagerSpecializer();
+
+  AddSimplifyCFGSILCombine(PM);
+
   AddSSAPasses(PM, OptimizationLevelKind::HighLevel);
   AddHighLevelLoopOptPasses(PM);
   PM.runOneIteration();

I don't have a reduced testcase, but presumably Erik will commit the above
change soon.

Fixes <rdar://problem/25646947>.