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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef jit_Ion_h
+#define jit_Ion_h
+
+#include "mozilla/Assertions.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/Likely.h"
+#include "mozilla/MemoryReporting.h"
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "jsfriendapi.h"
+#include "jspubtd.h"
+
+#include "jit/BaselineJIT.h"
+#include "jit/IonTypes.h"
+#include "jit/JitContext.h"
+#include "jit/JitOptions.h"
+#include "js/Principals.h"
+#include "js/TypeDecls.h"
+#include "vm/BytecodeUtil.h"
+#include "vm/JSContext.h"
+#include "vm/JSFunction.h"
+#include "vm/JSScript.h"
+
+namespace js {
+
+class RunState;
+
+namespace jit {
+
+class BaselineFrame;
+
+bool CanIonCompileScript(JSContext* cx, JSScript* script);
+
+[[nodiscard]] bool IonCompileScriptForBaselineAtEntry(JSContext* cx,
+ BaselineFrame* frame);
+
+struct IonOsrTempData {
+ void* jitcode;
+ uint8_t* baselineFrame;
+
+ static constexpr size_t offsetOfJitCode() {
+ return offsetof(IonOsrTempData, jitcode);
+ }
+ static constexpr size_t offsetOfBaselineFrame() {
+ return offsetof(IonOsrTempData, baselineFrame);
+ }
+};
+
+[[nodiscard]] bool IonCompileScriptForBaselineOSR(JSContext* cx,
+ BaselineFrame* frame,
+ uint32_t frameSize,
+ jsbytecode* pc,
+ IonOsrTempData** infoPtr);
+
+MethodStatus CanEnterIon(JSContext* cx, RunState& state);
+
+class MIRGenerator;
+class LIRGraph;
+class CodeGenerator;
+class LazyLinkExitFrameLayout;
+class WarpSnapshot;
+
+[[nodiscard]] bool OptimizeMIR(MIRGenerator* mir);
+LIRGraph* GenerateLIR(MIRGenerator* mir);
+CodeGenerator* GenerateCode(MIRGenerator* mir, LIRGraph* lir);
+CodeGenerator* CompileBackEnd(MIRGenerator* mir, WarpSnapshot* snapshot);
+
+void LinkIonScript(JSContext* cx, HandleScript calleescript);
+uint8_t* LazyLinkTopActivation(JSContext* cx, LazyLinkExitFrameLayout* frame);
+
+inline bool IsIonInlinableGetterOrSetterOp(JSOp op) {
+ // JSOp::GetProp, JSOp::CallProp, JSOp::Length, JSOp::GetElem,
+ // and JSOp::CallElem. (Inlined Getters)
+ // JSOp::SetProp, JSOp::SetName, JSOp::SetGName (Inlined Setters)
+ return IsGetPropOp(op) || IsGetElemOp(op) || IsSetPropOp(op);
+}
+
+inline bool IsIonInlinableOp(JSOp op) {
+ // JSOp::Call, JSOp::FunCall, JSOp::Eval, JSOp::New (Normal Callsites) or an
+ // inlinable getter or setter.
+ return (IsInvokeOp(op) && !IsSpreadOp(op)) ||
+ IsIonInlinableGetterOrSetterOp(op);
+}
+
+inline bool TooManyFormalArguments(unsigned nargs) {
+ return nargs >= SNAPSHOT_MAX_NARGS || TooManyActualArguments(nargs);
+}
+
+inline size_t NumLocalsAndArgs(JSScript* script) {
+ size_t num = 1 /* this */ + script->nfixed();
+ if (JSFunction* fun = script->function()) {
+ num += fun->nargs();
+ }
+ return num;
+}
+
+// Debugging RAII class which marks the current thread as performing an Ion
+// backend compilation.
+class MOZ_RAII AutoEnterIonBackend {
+ public:
+ AutoEnterIonBackend() {
+#ifdef DEBUG
+ JitContext* jcx = GetJitContext();
+ jcx->enterIonBackend();
+#endif
+ }
+
+#ifdef DEBUG
+ ~AutoEnterIonBackend() {
+ JitContext* jcx = GetJitContext();
+ jcx->leaveIonBackend();
+ }
+#endif
+};
+
+bool OffThreadCompilationAvailable(JSContext* cx);
+
+void ForbidCompilation(JSContext* cx, JSScript* script);
+
+size_t SizeOfIonData(JSScript* script, mozilla::MallocSizeOf mallocSizeOf);
+
+inline bool IsIonEnabled(JSContext* cx) {
+ if (MOZ_UNLIKELY(!IsBaselineJitEnabled(cx) || cx->options().disableIon())) {
+ return false;
+ }
+
+ if (MOZ_LIKELY(JitOptions.ion)) {
+ return true;
+ }
+ if (JitOptions.jitForTrustedPrincipals) {
+ JS::Realm* realm = js::GetContextRealm(cx);
+ return realm && JS::GetRealmPrincipals(realm) &&
+ JS::GetRealmPrincipals(realm)->isSystemOrAddonPrincipal();
+ }
+ return false;
+}
+
+// Implemented per-platform. Returns true if the flags will not require
+// further (lazy) computation.
+bool CPUFlagsHaveBeenComputed();
+
+} // namespace jit
+} // namespace js
+
+#endif /* jit_Ion_h */