1 files changed, 11 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/PrologEpilogInserter.cpp b/llvm/lib/CodeGen/PrologEpilogInserter.cpp
index f5f32ab..385e5a3 100644
--- a/llvm/lib/CodeGen/PrologEpilogInserter.cpp
+++ b/llvm/lib/CodeGen/PrologEpilogInserter.cpp
@@ -817,6 +817,17 @@ void PEI::replaceFrameIndices(MachineBasicBlock *BB, MachineFunction &Fn,
         continue;
       }
 
+      // Frame allocations are target independent. Simply swap the index with
+      // the offset.
+      if (MI->getOpcode() == TargetOpcode::FRAME_ALLOC) {
+        assert(TFI->hasFP(Fn) && "frame alloc requires FP");
+        MachineOperand &FI = MI->getOperand(i);
+        unsigned Reg;
+        int FrameOffset = TFI->getFrameIndexReference(Fn, FI.getIndex(), Reg);
+        FI.ChangeToImmediate(FrameOffset);
+        continue;
+      }
+
       // Some instructions (e.g. inline asm instructions) can have
       // multiple frame indices and/or cause eliminateFrameIndex
       // to insert more than one instruction. We need the register