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[NVPTX] cleanups and refacotring in NVPTXFrameLowering.cpp

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Summary: NFC

Test Plan: no regression

Reviewers: wengxt

Reviewed By: wengxt

Subscribers: jholewinski, llvm-commits

Differential Revision: http://reviews.llvm.org/D10849

llvm-svn: 241118
This commit is contained in:
Jingyue Wu 2015-06-30 21:28:31 +00:00
parent d0dd6a0ba1
commit 4759e1d16f
1 changed files with 19 additions and 27 deletions
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46
lib/Target/NVPTX/NVPTXFrameLowering.cpp
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@ -35,7 +35,6 @@ void NVPTXFrameLowering::emitPrologue(MachineFunction &MF,
MachineBasicBlock &MBB) const {
if (MF.getFrameInfo()->hasStackObjects()) {
assert(&MF.front() == &MBB && "Shrink-wrapping not yet supported");
// Insert "mov.u32 %SP, %Depot"
MachineInstr *MI = MBB.begin();
MachineRegisterInfo &MR = MF.getRegInfo();
@ -43,33 +42,26 @@ void NVPTXFrameLowering::emitPrologue(MachineFunction &MF,
// in the BB, so giving it no debug location.
DebugLoc dl = DebugLoc();
// mov %SPL, %depot;
// cvta.local %SP, %SPL;
if (static_cast<const NVPTXTargetMachine &>(MF.getTarget()).is64Bit()) {
// Check if %SP is actually used
if (!MR.use_empty(NVPTX::VRFrame)) {
MI = BuildMI(MBB, MI, dl, MF.getSubtarget().getInstrInfo()->get(
NVPTX::cvta_local_yes_64),
NVPTX::VRFrame)
.addReg(NVPTX::VRFrameLocal);
}
BuildMI(MBB, MI, dl,
MF.getSubtarget().getInstrInfo()->get(NVPTX::MOV_DEPOT_ADDR_64),
NVPTX::VRFrameLocal)
.addImm(MF.getFunctionNumber());
} else {
// Check if %SP is actually used
if (!MR.use_empty(NVPTX::VRFrame)) {
MI = BuildMI(MBB, MI, dl, MF.getSubtarget().getInstrInfo()->get(
NVPTX::cvta_local_yes),
NVPTX::VRFrame)
.addReg(NVPTX::VRFrameLocal);
}
BuildMI(MBB, MI, dl,
MF.getSubtarget().getInstrInfo()->get(NVPTX::MOV_DEPOT_ADDR),
NVPTX::VRFrameLocal)
.addImm(MF.getFunctionNumber());
// Emits
// mov %SPL, %depot;
// cvta.local %SP, %SPL;
// for local address accesses in MF.
bool Is64Bit =
static_cast<const NVPTXTargetMachine &>(MF.getTarget()).is64Bit();
unsigned CvtaLocalOpcode =
(Is64Bit ? NVPTX::cvta_local_yes_64 : NVPTX::cvta_local_yes);
unsigned MovDepotOpcode =
(Is64Bit ? NVPTX::MOV_DEPOT_ADDR_64 : NVPTX::MOV_DEPOT_ADDR);
if (!MR.use_empty(NVPTX::VRFrame)) {
// If %SP is not used, do not bother emitting "cvta.local %SP, %SPL".
MI = BuildMI(MBB, MI, dl,
MF.getSubtarget().getInstrInfo()->get(CvtaLocalOpcode),
NVPTX::VRFrame)
.addReg(NVPTX::VRFrameLocal);
}
BuildMI(MBB, MI, dl, MF.getSubtarget().getInstrInfo()->get(MovDepotOpcode),
NVPTX::VRFrameLocal)
.addImm(MF.getFunctionNumber());
}
}