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author | Jim Grosbach <grosbach@apple.com> | 2012-02-28 23:53:30 +0000 |
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committer | Jim Grosbach <grosbach@apple.com> | 2012-02-28 23:53:30 +0000 |
commit | c01810eeb7227010f73cb39e3c4fa0197a3c4ef0 (patch) | |
tree | 10b49a3600d9b9c798d9679ca3300348ac7eb606 /lib/Target/ARM/Thumb1InstrInfo.cpp | |
parent | b62fbc5e469f532fd1747a3c24115fb1d0ba792f (diff) | |
download | external_llvm-c01810eeb7227010f73cb39e3c4fa0197a3c4ef0.zip external_llvm-c01810eeb7227010f73cb39e3c4fa0197a3c4ef0.tar.gz external_llvm-c01810eeb7227010f73cb39e3c4fa0197a3c4ef0.tar.bz2 |
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
Diffstat (limited to 'lib/Target/ARM/Thumb1InstrInfo.cpp')
-rw-r--r-- | lib/Target/ARM/Thumb1InstrInfo.cpp | 11 |
1 files changed, 10 insertions, 1 deletions
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 @@ Thumb1InstrInfo::Thumb1InstrInfo(const ARMSubtarget &STI) : 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; } |