Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 183 insertions, 0 deletions

diff --git a/js/src/jit/MIRGenerator.h b/js/src/jit/MIRGenerator.h
new file mode 100644
index 0000000000..4026a69117
--- /dev/null
+++ b/js/src/jit/MIRGenerator.h
@@ -0,0 +1,183 @@
+/* -*- 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_MIRGenerator_h
+#define jit_MIRGenerator_h
+
+// This file declares the data structures used to build a control-flow graph
+// containing MIR.
+
+#include "mozilla/Assertions.h"
+#include "mozilla/Atomics.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/Result.h"
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#include "jit/CompileInfo.h"
+#include "jit/CompileWrappers.h"
+#include "jit/JitAllocPolicy.h"
+#include "jit/JitContext.h"
+#include "jit/JitSpewer.h"
+#include "jit/PerfSpewer.h"
+#include "js/Utility.h"
+#include "vm/GeckoProfiler.h"
+
+namespace js {
+namespace jit {
+
+class JitRuntime;
+class MIRGraph;
+class OptimizationInfo;
+
+class MIRGenerator final {
+ public:
+  MIRGenerator(CompileRealm* realm, const JitCompileOptions& options,
+               TempAllocator* alloc, MIRGraph* graph,
+               const CompileInfo* outerInfo,
+               const OptimizationInfo* optimizationInfo);
+
+  void initMinWasmHeapLength(uint64_t init) { minWasmHeapLength_ = init; }
+
+  TempAllocator& alloc() { return *alloc_; }
+  MIRGraph& graph() { return *graph_; }
+  [[nodiscard]] bool ensureBallast() { return alloc().ensureBallast(); }
+  const JitRuntime* jitRuntime() const { return runtime->jitRuntime(); }
+  const CompileInfo& outerInfo() const { return *outerInfo_; }
+  const OptimizationInfo& optimizationInfo() const {
+    return *optimizationInfo_;
+  }
+  bool hasProfilingScripts() const {
+    return runtime && runtime->profilingScripts();
+  }
+
+  template <typename T>
+  T* allocate(size_t count = 1) {
+    size_t bytes;
+    if (MOZ_UNLIKELY(!CalculateAllocSize<T>(count, &bytes))) {
+      return nullptr;
+    }
+    return static_cast<T*>(alloc().allocate(bytes));
+  }
+
+  // Set an error state and prints a message. Returns false so errors can be
+  // propagated up.
+  mozilla::GenericErrorResult<AbortReason> abort(AbortReason r);
+  mozilla::GenericErrorResult<AbortReason> abort(AbortReason r,
+                                                 const char* message, ...)
+      MOZ_FORMAT_PRINTF(3, 4);
+
+  mozilla::GenericErrorResult<AbortReason> abortFmt(AbortReason r,
+                                                    const char* message,
+                                                    va_list ap)
+      MOZ_FORMAT_PRINTF(3, 0);
+
+  // Collect the evaluation result of phases after WarpOracle, such that
+  // off-thread compilation can report what error got encountered.
+  void setOffThreadStatus(AbortReasonOr<Ok>&& result) {
+    MOZ_ASSERT(offThreadStatus_.isOk());
+    offThreadStatus_ = std::move(result);
+  }
+  const AbortReasonOr<Ok>& getOffThreadStatus() const {
+    return offThreadStatus_;
+  }
+
+  [[nodiscard]] bool instrumentedProfiling() {
+    if (!instrumentedProfilingIsCached_) {
+      instrumentedProfiling_ = runtime->geckoProfiler().enabled();
+      instrumentedProfilingIsCached_ = true;
+    }
+    return instrumentedProfiling_;
+  }
+
+  bool isProfilerInstrumentationEnabled() {
+    return !compilingWasm() && instrumentedProfiling();
+  }
+
+  gc::Heap initialStringHeap() const {
+    return stringsCanBeInNursery_ ? gc::Heap::Default : gc::Heap::Tenured;
+  }
+
+  gc::Heap initialBigIntHeap() const {
+    return bigIntsCanBeInNursery_ ? gc::Heap::Default : gc::Heap::Tenured;
+  }
+
+  // Whether the main thread is trying to cancel this build.
+  bool shouldCancel(const char* why) { return cancelBuild_; }
+  void cancel() { cancelBuild_ = true; }
+
+  bool compilingWasm() const { return outerInfo_->compilingWasm(); }
+
+  uint32_t wasmMaxStackArgBytes() const {
+    MOZ_ASSERT(compilingWasm());
+    return wasmMaxStackArgBytes_;
+  }
+  void initWasmMaxStackArgBytes(uint32_t n) {
+    MOZ_ASSERT(compilingWasm());
+    MOZ_ASSERT(wasmMaxStackArgBytes_ == 0);
+    wasmMaxStackArgBytes_ = n;
+  }
+  uint64_t minWasmHeapLength() const { return minWasmHeapLength_; }
+
+  void setNeedsOverrecursedCheck() { needsOverrecursedCheck_ = true; }
+  bool needsOverrecursedCheck() const { return needsOverrecursedCheck_; }
+
+  void setNeedsStaticStackAlignment() { needsStaticStackAlignment_ = true; }
+  bool needsStaticStackAlignment() const { return needsStaticStackAlignment_; }
+
+ public:
+  CompileRealm* realm;
+  CompileRuntime* runtime;
+
+ private:
+  // The CompileInfo for the outermost script.
+  const CompileInfo* outerInfo_;
+
+  const OptimizationInfo* optimizationInfo_;
+  TempAllocator* alloc_;
+  MIRGraph* graph_;
+  AbortReasonOr<Ok> offThreadStatus_;
+  mozilla::Atomic<bool, mozilla::Relaxed> cancelBuild_;
+
+  uint32_t wasmMaxStackArgBytes_;
+  bool needsOverrecursedCheck_;
+  bool needsStaticStackAlignment_;
+
+  bool instrumentedProfiling_;
+  bool instrumentedProfilingIsCached_;
+  bool stringsCanBeInNursery_;
+  bool bigIntsCanBeInNursery_;
+
+  bool disableLICM_ = false;
+
+ public:
+  void disableLICM() { disableLICM_ = true; }
+  bool licmEnabled() const;
+
+ private:
+  uint64_t minWasmHeapLength_;
+
+  IonPerfSpewer wasmPerfSpewer_;
+
+ public:
+  IonPerfSpewer& perfSpewer() { return wasmPerfSpewer_; }
+
+ public:
+  const JitCompileOptions options;
+
+ private:
+  GraphSpewer gs_;
+
+ public:
+  GraphSpewer& graphSpewer() { return gs_; }
+};
+
+}  // namespace jit
+}  // namespace js
+
+#endif /* jit_MIRGenerator_h */