[turbofan] Introduce node regions for protection from scheduling.

src/compiler/common-operator.cc

Index: src/compiler/common-operator.cc
diff --git a/src/compiler/common-operator.cc b/src/compiler/common-operator.cc
index ca22bcbcf037d92ebdd1bef38b85c86c300eebcf..6917cafdaa6c7121ae587787cbf1abf01f62ff44 100644
--- a/src/compiler/common-operator.cc
+++ b/src/compiler/common-operator.cc
@@ -678,21 +678,19 @@ const Operator* CommonOperatorBuilder::EffectSet(int arguments) {
 }
 
 
-const Operator* CommonOperatorBuilder::ValueEffect(int arguments) {
-  DCHECK(arguments > 0);                        // Disallow empty value effects.
-  return new (zone()) Operator(                 // --
-      IrOpcode::kValueEffect, Operator::kPure,  // opcode
-      "ValueEffect",                            // name
-      arguments, 0, 0, 0, 1, 0);                // counts
+const Operator* CommonOperatorBuilder::BeginRegion() {

[Benedikt Meurer, 2015/10/13 19:12:09]

Nit: Move to the CACHED_OP_LIST above.

[Jarin, 2015/10/14 06:37:20]

Done.

+  return new (zone()) Operator(                    // --
+      IrOpcode::kBeginRegion, Operator::kNoThrow,  // opcode
+      "BeginRegion",                               // name
+      0, 1, 0, 0, 1, 0);                           // counts
 }
 
 
-const Operator* CommonOperatorBuilder::Finish(int arguments) {
-  DCHECK(arguments > 0);                   // Disallow empty finishes.
-  return new (zone()) Operator(            // --
-      IrOpcode::kFinish, Operator::kPure,  // opcode
-      "Finish",                            // name
-      1, arguments, 0, 1, 0, 0);           // counts
+const Operator* CommonOperatorBuilder::FinishRegion() {

[Benedikt Meurer, 2015/10/13 19:12:09]

Nit: Move to the CACHED_OP_LIST above.

[Jarin, 2015/10/14 06:37:20]

Done.

+  return new (zone()) Operator(                     // --
+      IrOpcode::kFinishRegion, Operator::kNoThrow,  // opcode
+      "FinishRegion",                               // name
+      1, 1, 0, 1, 1, 0);                            // counts
 }