X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FWebAssembly%2FWebAssemblyFrameLowering.cpp;h=8a2cf1ad46e2fd32f9959dfdf9697bfabb596a79;hb=7cbf72b4896c055cae285d7e488b8de18aa835f7;hp=330695e9f67d372274d16688403ae382d2aace1f;hpb=a74341308f19b7cd1691eddb3bd7be99fa8204a6;p=oota-llvm.git

diff --git a/lib/Target/WebAssembly/WebAssemblyFrameLowering.cpp b/lib/Target/WebAssembly/WebAssemblyFrameLowering.cpp
index 330695e9f67..8a2cf1ad46e 100644
--- a/lib/Target/WebAssembly/WebAssemblyFrameLowering.cpp
+++ b/lib/Target/WebAssembly/WebAssemblyFrameLowering.cpp
@@ -32,14 +32,19 @@
 #include "llvm/Support/Debug.h"
 using namespace llvm;
 
-#define DEBUG_TYPE "frame-info"
+#define DEBUG_TYPE "wasm-frame-info"
 
 // TODO: Implement a red zone?
 
 /// Return true if the specified function should have a dedicated frame pointer
 /// register.
 bool WebAssemblyFrameLowering::hasFP(const MachineFunction &MF) const {
-  llvm_unreachable("TODO: implement hasFP");
+  const MachineFrameInfo *MFI = MF.getFrameInfo();
+  const auto *RegInfo =
+      MF.getSubtarget<WebAssemblySubtarget>().getRegisterInfo();
+  return MFI->hasCalls() || MFI->hasVarSizedObjects() ||
+         MFI->isFrameAddressTaken() || MFI->hasStackMap() ||
+         MFI->hasPatchPoint() || RegInfo->needsStackRealignment(MF);
 }
 
 /// Under normal circumstances, when a frame pointer is not required, we reserve
@@ -60,15 +65,10 @@ void WebAssemblyFrameLowering::eliminateCallFramePseudoInstr(
 
 void WebAssemblyFrameLowering::emitPrologue(MachineFunction &MF,
                                             MachineBasicBlock &MBB) const {
-  llvm_unreachable("TODO: implement emitPrologue");
+  // FIXME: Implement WebAssemblyFrameLowering::emitPrologue.
 }
 
 void WebAssemblyFrameLowering::emitEpilogue(MachineFunction &MF,
                                             MachineBasicBlock &MBB) const {
   llvm_unreachable("TODO: implement emitEpilogue");
 }
-
-void WebAssemblyFrameLowering::processFunctionBeforeCalleeSavedScan(
-    MachineFunction &MF, RegScavenger *RS) const {
-  llvm_unreachable("TODO: implement processFunctionBeforeCalleeSavedScan");
-}