[turbofan] Rename context stack as part of the environment for OSR.

src/compiler/osr.cc

Index: src/compiler/osr.cc
diff --git a/src/compiler/osr.cc b/src/compiler/osr.cc
index 2eccf302f50212f49d44eebd8d27c32193a4aa25..10b973a00e4bf923ec6502e9280c49fa21150297 100644
--- a/src/compiler/osr.cc
+++ b/src/compiler/osr.cc
@@ -48,10 +48,6 @@ static void PeelOuterLoopsForOsr(Graph* graph, CommonOperatorBuilder* common,
     // Prepare the mapping for OSR values and the OSR loop entry.
     mapping->at(osr_normal_entry->id()) = dead;
     mapping->at(osr_loop_entry->id()) = dead;
-    // Don't duplicate the OSR values.
-    for (Node* use : osr_loop_entry->uses()) {
-      if (use->opcode() == IrOpcode::kOsrValue) mapping->at(use->id()) = use;
-    }
 
     // The outer loops are dead in this copy.
     for (LoopTree::Loop* outer = loop->parent(); outer;
@@ -69,8 +65,9 @@ static void PeelOuterLoopsForOsr(Graph* graph, CommonOperatorBuilder* common,
         // Mapping already exists.
         continue;
       }
-      if (orig->InputCount() == 0) {
-        // No need to copy leaf nodes.
+      if (orig->InputCount() == 0 || orig->opcode() == IrOpcode::kParameter ||
+          orig->opcode() == IrOpcode::kOsrValue) {
+        // No need to copy leaf nodes or parameters.
         mapping->at(orig->id()) = orig;
         continue;
       }