[turbofan] Introduce prediction for exception handlers.

src/compiler/ppc/instruction-selector-ppc.cc

Index: src/compiler/ppc/instruction-selector-ppc.cc
diff --git a/src/compiler/ppc/instruction-selector-ppc.cc b/src/compiler/ppc/instruction-selector-ppc.cc
index afe30d4c8591b4673aad949e887ff06720490762..4f1cbe025b83e9d2f92b550a09c7dd97bc0de908 100644
--- a/src/compiler/ppc/instruction-selector-ppc.cc
+++ b/src/compiler/ppc/instruction-selector-ppc.cc
@@ -1461,6 +1461,11 @@ void InstructionSelector::VisitCall(Node* node, BasicBlock* handler) {
   // Pass label of exception handler block.
   CallDescriptor::Flags flags = descriptor->flags();
   if (handler) {
+    DCHECK_EQ(IrOpcode::kIfException, handler->front()->opcode());
+    IfExceptionHint hint = OpParameter<IfExceptionHint>(handler->front());
+    if (hint == IfExceptionHint::kLocallyCaught) {
+      flags |= CallDescriptor::kHasLocalCatchHandler;
+    }
     flags |= CallDescriptor::kHasExceptionHandler;
     buffer.instruction_args.push_back(g.Label(handler));
   }