PPC/s390: [turbofan] Correct lazy deopt by {JSCreate} operation.

src/builtins/s390/builtins-s390.cc

Index: src/builtins/s390/builtins-s390.cc
diff --git a/src/builtins/s390/builtins-s390.cc b/src/builtins/s390/builtins-s390.cc
index d5002cade500ae2fdae033d544fa98f5a759d07a..87cd866a05cc164ee267606ec28e5fe89fde887d 100644
--- a/src/builtins/s390/builtins-s390.cc
+++ b/src/builtins/s390/builtins-s390.cc
@@ -556,6 +556,7 @@ namespace {
 void Generate_JSConstructStubHelper(MacroAssembler* masm, bool is_api_function,
                                     bool create_implicit_receiver,
                                     bool check_derived_construct) {
+  Label post_instantiation_deopt_entry;
   // ----------- S t a t e -------------
   //  -- r2     : number of arguments
   //  -- r3     : constructor function
@@ -606,6 +607,9 @@ void Generate_JSConstructStubHelper(MacroAssembler* masm, bool is_api_function,
       __ Push(r6, r6);
     }
 
+    // Deoptimizer re-enters stub code here.
+    __ bind(&post_instantiation_deopt_entry);
+
     // Set up pointer to last argument.
     __ la(r4, MemOperand(fp, StandardFrameConstants::kCallerSPOffset));
 
@@ -641,7 +645,8 @@ void Generate_JSConstructStubHelper(MacroAssembler* masm, bool is_api_function,
 
     // Store offset of return address for deoptimizer.
     if (create_implicit_receiver && !is_api_function) {
-      masm->isolate()->heap()->SetConstructStubDeoptPCOffset(masm->pc_offset());
+      masm->isolate()->heap()->SetConstructStubInvokeDeoptPCOffset(
+          masm->pc_offset());
     }
 
     // Restore context from the frame.
@@ -707,6 +712,35 @@ void Generate_JSConstructStubHelper(MacroAssembler* masm, bool is_api_function,
     __ IncrementCounter(isolate->counters()->constructed_objects(), 1, r3, r4);
   }
   __ Ret();
+
+  // Store offset of trampoline address for deoptimizer. This is the bailout
+  // point after the receiver instantiation but before the function invocation.
+  // We need to restore some registers in order to continue the above code.
+  if (create_implicit_receiver && !is_api_function) {
+    masm->isolate()->heap()->SetConstructStubCreateDeoptPCOffset(
+        masm->pc_offset());
+
+    // ----------- S t a t e -------------
+    //  -- r2    : newly allocated object
+    //  -- sp[0] : constructor function
+    // -----------------------------------
+
+    __ pop(r3);
+    __ Push(r2, r2);
+
+    // Retrieve smi-tagged arguments count from the stack.
+    __ LoadP(r2, MemOperand(fp, ConstructFrameConstants::kLengthOffset));
+    __ SmiUntag(r2);
+
+    // Retrieve the new target value from the stack. This was placed into the
+    // frame description in place of the receiver by the optimizing compiler.
+    __ la(r5, MemOperand(fp, StandardFrameConstants::kCallerSPOffset));
+    __ ShiftLeftP(ip, r2, Operand(kPointerSizeLog2));
+    __ LoadP(r5, MemOperand(r2, ip));
+
+    // Continue with constructor function invocation.
+    __ b(&post_instantiation_deopt_entry);
+  }
 }
 
 }  // namespace