PPC/s390: [sparkplug] Allow sparkplug->ignition deopt in func entry

Port af62c4f0

Original Commit Message:

    Adapted from https://crrev.com/c/3862264.

    Add a new teardown trampoline for the case where a Sparkplug function is
    deoptimized during its function entry stack check. In these cases, the
    stack is in an incomplete setup state, so instead of forwarding to
    interpreter re-entry, we undo the partial stack setup and forward to
    the standard interpreter entry.

R=szuend@chromium.org, joransiu@ca.ibm.com, junyan@redhat.com, midawson@redhat.com
BUG=
LOG=N

Change-Id: I6e3b906938dc9a297b602290e762426e56fb8d9d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3864189Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/main@{#82828}

src/builtins/ppc/builtins-ppc.cc

@@ -1321,6 +1321,26 @@ void Builtins::Generate_BaselineOutOfLinePrologue(MacroAssembler* masm) {
 }
 #endif
 
+// static
+void Builtins::Generate_BaselineOutOfLinePrologueDeopt(MacroAssembler* masm) {
+  // We're here because we got deopted during BaselineOutOfLinePrologue's stack
+  // check. Undo all its frame creation and call into the interpreter instead.
+
+  // Drop bytecode offset (was the feedback vector but got replaced during
+  // deopt) and bytecode array.
+  __ Drop(2);
+
+  // Context, closure, argc.
+  __ Pop(kContextRegister, kJavaScriptCallTargetRegister,
+         kJavaScriptCallArgCountRegister);
+
+  // Drop frame pointer
+  __ LeaveFrame(StackFrame::BASELINE);
+
+  // Enter the interpreter.
+  __ TailCallBuiltin(Builtin::kInterpreterEntryTrampoline);
+}
+
 // Generate code for entering a JS function with the interpreter.
 // On entry to the function the receiver and arguments have been pushed on the
 // stack left to right.

src/builtins/s390/builtins-s390.cc

@@ -1358,6 +1358,26 @@ void Builtins::Generate_BaselineOutOfLinePrologue(MacroAssembler* masm) {
 }
 #endif
 
+// static
+void Builtins::Generate_BaselineOutOfLinePrologueDeopt(MacroAssembler* masm) {
+  // We're here because we got deopted during BaselineOutOfLinePrologue's stack
+  // check. Undo all its frame creation and call into the interpreter instead.
+
+  // Drop bytecode offset (was the feedback vector but got replaced during
+  // deopt) and bytecode array.
+  __ Drop(2);
+
+  // Context, closure, argc.
+  __ Pop(kContextRegister, kJavaScriptCallTargetRegister,
+         kJavaScriptCallArgCountRegister);
+
+  // Drop frame pointer
+  __ LeaveFrame(StackFrame::BASELINE);
+
+  // Enter the interpreter.
+  __ TailCallBuiltin(Builtin::kInterpreterEntryTrampoline);
+}
+
 // Generate code for entering a JS function with the interpreter.
 // On entry to the function the receiver and arguments have been pushed on the
 // stack left to right.