ARM implement TargetInstrInfo::getNoopForMachoTarget()
Without this hook, functions w/ a completely empty body (including no
epilogue) will cause an MCEmitter assertion failure.
For example,
define internal fastcc void @empty_function() {
unreachable
}
rdar://10947471
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151673 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/Thumb1InstrInfo.cpp b/lib/Target/ARM/Thumb1InstrInfo.cpp
index ba16db3..adaccdd 100644
--- a/lib/Target/ARM/Thumb1InstrInfo.cpp
+++ b/lib/Target/ARM/Thumb1InstrInfo.cpp
@@ -19,7 +19,7 @@
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/ADT/SmallVector.h"
-#include "Thumb1InstrInfo.h"
+#include "llvm/MC/MCInst.h"
using namespace llvm;
@@ -27,6 +27,15 @@
: ARMBaseInstrInfo(STI), RI(*this, STI) {
}
+/// getNoopForMachoTarget - Return the noop instruction to use for a noop.
+void Thumb1InstrInfo::getNoopForMachoTarget(MCInst &NopInst) const {
+ NopInst.setOpcode(ARM::tMOVr);
+ NopInst.addOperand(MCOperand::CreateReg(ARM::R8));
+ NopInst.addOperand(MCOperand::CreateReg(ARM::R8));
+ NopInst.addOperand(MCOperand::CreateImm(ARMCC::AL));
+ NopInst.addOperand(MCOperand::CreateReg(0));
+}
+
unsigned Thumb1InstrInfo::getUnindexedOpcode(unsigned Opc) const {
return 0;
}