Preserve MachineMemOperands in ARMLoadStoreOptimizer.
Fixes PR8113.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144409 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMLoadStoreOptimizer.cpp b/lib/Target/ARM/ARMLoadStoreOptimizer.cpp
index 4c3be89..c8728f4 100644
--- a/lib/Target/ARM/ARMLoadStoreOptimizer.cpp
+++ b/lib/Target/ARM/ARMLoadStoreOptimizer.cpp
@@ -32,6 +32,7 @@
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/Debug.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallPtrSet.h"
@@ -1504,6 +1505,23 @@
return AddedRegPressure.size() <= MemRegs.size() * 2;
}
+
+/// Copy Op0 and Op1 operands into a new array assigned to MI.
+static void concatenateMemOperands(MachineInstr *MI, MachineInstr *Op0,
+ MachineInstr *Op1) {
+ assert(MI->memoperands_empty() && "expected a new machineinstr");
+ size_t numMemRefs = (Op0->memoperands_end() - Op0->memoperands_begin())
+ + (Op1->memoperands_end() - Op1->memoperands_begin());
+
+ MachineFunction *MF = MI->getParent()->getParent();
+ MachineSDNode::mmo_iterator MemBegin = MF->allocateMemRefsArray(numMemRefs);
+ MachineSDNode::mmo_iterator MemEnd =
+ std::copy(Op0->memoperands_begin(), Op0->memoperands_end(), MemBegin);
+ MemEnd =
+ std::copy(Op1->memoperands_begin(), Op1->memoperands_end(), MemEnd);
+ MI->setMemRefs(MemBegin, MemEnd);
+}
+
bool
ARMPreAllocLoadStoreOpt::CanFormLdStDWord(MachineInstr *Op0, MachineInstr *Op1,
DebugLoc &dl,
@@ -1698,6 +1716,8 @@
if (!isT2)
MIB.addReg(0);
MIB.addImm(Offset).addImm(Pred).addReg(PredReg);
+ concatenateMemOperands(MIB, Op0, Op1);
+ DEBUG(dbgs() << "Formed " << *MIB << "\n");
++NumLDRDFormed;
} else {
MachineInstrBuilder MIB = BuildMI(*MBB, InsertPos, dl, MCID)
@@ -1710,6 +1730,8 @@
if (!isT2)
MIB.addReg(0);
MIB.addImm(Offset).addImm(Pred).addReg(PredReg);
+ concatenateMemOperands(MIB, Op0, Op1);
+ DEBUG(dbgs() << "Formed " << *MIB << "\n");
++NumSTRDFormed;
}
MBB->erase(Op0);