Extend X86's addFrameReference to add a MachineMemOperand for
the frame reference. This will help post-RA scheduling determine
that spills to distinct stack slots are independent.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60486 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86InstrBuilder.h b/lib/Target/X86/X86InstrBuilder.h
index 87c6342..74f9e05 100644
--- a/lib/Target/X86/X86InstrBuilder.h
+++ b/lib/Target/X86/X86InstrBuilder.h
@@ -24,7 +24,9 @@
#ifndef X86INSTRBUILDER_H
#define X86INSTRBUILDER_H
+#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/PseudoSourceValue.h"
namespace llvm {
@@ -109,7 +111,22 @@
///
inline const MachineInstrBuilder &
addFrameReference(const MachineInstrBuilder &MIB, int FI, int Offset = 0) {
- return MIB.addFrameIndex(FI).addImm(1).addReg(0).addImm(Offset);
+ MachineInstr *MI = MIB;
+ MachineFunction &MF = *MI->getParent()->getParent();
+ MachineFrameInfo &MFI = *MF.getFrameInfo();
+ const TargetInstrDesc &TID = MI->getDesc();
+ unsigned Flags = 0;
+ if (TID.mayLoad())
+ Flags |= MachineMemOperand::MOLoad;
+ if (TID.mayStore())
+ Flags |= MachineMemOperand::MOStore;
+ MachineMemOperand MMO(PseudoSourceValue::getFixedStack(FI),
+ Flags,
+ MFI.getObjectOffset(FI) + Offset,
+ MFI.getObjectSize(FI),
+ MFI.getObjectAlignment(FI));
+ return MIB.addFrameIndex(FI).addImm(1).addReg(0).addImm(Offset)
+ .addMemOperand(MMO);
}
/// addConstantPoolReference - This function is used to add a reference to the