Vendor import of llvm trunk r238337:

https://llvm.org/svn/llvm-project/llvm/trunk@238337

1 files changed, 12 insertions, 0 deletions

diff --git a/lib/CodeGen/TargetFrameLoweringImpl.cpp b/lib/CodeGen/TargetFrameLoweringImpl.cpp
index 1557d10..5638324 100644
--- a/lib/CodeGen/TargetFrameLoweringImpl.cpp
+++ b/lib/CodeGen/TargetFrameLoweringImpl.cpp
@@ -14,6 +14,7 @@
 #include "llvm/Target/TargetFrameLowering.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
 #include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/IR/Function.h"
 #include "llvm/Target/TargetRegisterInfo.h"
 #include "llvm/Target/TargetSubtargetInfo.h"
 #include <cstdlib>
@@ -22,6 +23,12 @@ using namespace llvm;
 TargetFrameLowering::~TargetFrameLowering() {
 }
 
+/// The default implementation just looks at attribute "no-frame-pointer-elim".
+bool TargetFrameLowering::noFramePointerElim(const MachineFunction &MF) const {
+  auto Attr = MF.getFunction()->getFnAttribute("no-frame-pointer-elim");
+  return Attr.getValueAsString() == "true";
+}
+
 /// getFrameIndexOffset - Returns the displacement from the frame register to
 /// the stack frame of the specified index. This is the default implementation
 /// which is overridden for some targets.
@@ -42,3 +49,8 @@ int TargetFrameLowering::getFrameIndexReference(const MachineFunction &MF,
   FrameReg = RI->getFrameRegister(MF);
   return getFrameIndexOffset(MF, FI);
 }
+
+bool TargetFrameLowering::needsFrameIndexResolution(
+    const MachineFunction &MF) const {
+  return MF.getFrameInfo()->hasStackObjects();
+}