Extend hasStoreToStackSlot with list of FI accesses.

For instructions that spill/fill to and from multiple frame-indices
in a single instruction, hasStoreToStackSlot and hasLoadFromStackSlot
should return an array of accesses, rather than just the first encounter
of such an access.

This better describes FI accesses for AArch64 (paired) LDP/STP
instructions.

Reviewers: t.p.northover, gberry, thegameg, rengolin, javed.absar, MatzeB

Reviewed By: MatzeB

Differential Revision: https://reviews.llvm.org/D51537

llvm-svn: 341301

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/LiveDebugValues.cpp b/llvm/lib/CodeGen/LiveDebugValues.cpp
index 417bd9d5aeb..dbc19b082d2 100644
--- a/llvm/lib/CodeGen/LiveDebugValues.cpp
+++ b/llvm/lib/CodeGen/LiveDebugValues.cpp
@@ -470,7 +470,7 @@ bool LiveDebugValues::isSpillInstruction(const MachineInstr &MI,
                                          MachineFunction *MF, unsigned &Reg) {
   const MachineFrameInfo &FrameInfo = MF->getFrameInfo();
   int FI;
-  const MachineMemOperand *MMO;
+  SmallVector<TargetInstrInfo::FrameAccess, 1> Accesses;
 
   // TODO: Handle multiple stores folded into one.
   if (!MI.hasOneMemOperand())
@@ -478,7 +478,7 @@ bool LiveDebugValues::isSpillInstruction(const MachineInstr &MI,
 
   // To identify a spill instruction, use the same criteria as in AsmPrinter.
   if (!((TII->isStoreToStackSlotPostFE(MI, FI) ||
-         TII->hasStoreToStackSlot(MI, MMO, FI)) &&
+         TII->hasStoreToStackSlot(MI, Accesses)) &&
         FrameInfo.isSpillSlotObjectIndex(FI)))
     return false;