1 files changed, 59 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/TargetOptionsImpl.cpp b/llvm/lib/CodeGen/TargetOptionsImpl.cpp
new file mode 100644
index 000000000000..039748d817ca
--- /dev/null
+++ b/llvm/lib/CodeGen/TargetOptionsImpl.cpp
@@ -0,0 +1,59 @@
+//===-- TargetOptionsImpl.cpp - Options that apply to all targets ----------==//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the methods in the TargetOptions.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/TargetFrameLowering.h"
+#include "llvm/CodeGen/TargetSubtargetInfo.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/Module.h"
+#include "llvm/Target/TargetOptions.h"
+using namespace llvm;
+
+/// DisableFramePointerElim - This returns true if frame pointer elimination
+/// optimization should be disabled for the given machine function.
+bool TargetOptions::DisableFramePointerElim(const MachineFunction &MF) const {
+  // Check to see if the target want to forcably keep frame pointer.
+  if (MF.getSubtarget().getFrameLowering()->keepFramePointer(MF))
+    return true;
+
+  const Function &F = MF.getFunction();
+
+  // TODO: Remove support for old `fp elim` function attributes after fully
+  //       migrate to use "frame-pointer"
+  if (!F.hasFnAttribute("frame-pointer")) {
+    // Check to see if we should eliminate all frame pointers.
+    if (F.getFnAttribute("no-frame-pointer-elim").getValueAsString() == "true")
+      return true;
+
+    // Check to see if we should eliminate non-leaf frame pointers.
+    if (F.hasFnAttribute("no-frame-pointer-elim-non-leaf"))
+      return MF.getFrameInfo().hasCalls();
+
+    return false;
+  }
+
+  StringRef FP = F.getFnAttribute("frame-pointer").getValueAsString();
+  if (FP == "all")
+    return true;
+  if (FP == "non-leaf")
+    return MF.getFrameInfo().hasCalls();
+  if (FP == "none")
+    return false;
+  llvm_unreachable("unknown frame pointer flag");
+}
+
+/// HonorSignDependentRoundingFPMath - Return true if the codegen must assume
+/// that the rounding mode of the FPU can change from its default.
+bool TargetOptions::HonorSignDependentRoundingFPMath() const {
+  return !UnsafeFPMath && HonorSignDependentRoundingFPMathOption;
+}