[EVM] Constraint spills

Author: PavelKopyl

llvm/lib/Target/EVM/EVMFinalizeStackFrames.cpp

@@ -149,12 +149,16 @@ bool EVMFinalizeStackFrames::runOnModule(Module &M) {
   SmallVector<std::pair<MachineFunction *, uint64_t>, 8> ToReplaceFI;
 
   SmallVector<MachineFunction *> MFs;
-  for_each(M.getFunctionList(), [&MFs, &MMI](Function &F) {
-    if (MachineFunction *MF = MMI.getMachineFunction(F))
-      MFs.push_back(MF);
-  });
-
-  if (!MFs.empty() &&
+  bool ShouldSpillConstants = false;
+  for_each(M.getFunctionList(),
+           [&MFs, &MMI, &ShouldSpillConstants](Function &F) {
+             if (MachineFunction *MF = MMI.getMachineFunction(F)) {
+               ShouldSpillConstants |= MF->getFrameInfo().hasStackObjects();
+               MFs.push_back(MF);
+             }
+           });
+
+  if (ShouldSpillConstants &&
       MFs.front()->getFunction().hasFnAttribute("evm-entry-function")) {
     EVMConstantSpiller ConstSpiller(M, MMI);
     if (ConstSpiller.getSpillSize()) {