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R600: Take inner dependency into tex/vtx clauses 

llvm-svn: 180757
This commit is contained in:
Vincent Lejeune 2013-04-30 00:14:00 +00:00
parent 3f1d136b02
commit 7c395f77de
1 changed files with 34 additions and 0 deletions
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34
llvm/lib/Target/R600/R600ControlFlowFinalizer.cpp
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@ -48,6 +48,7 @@ private:
static char ID;
const R600InstrInfo *TII;
const R600RegisterInfo &TRI;
unsigned MaxFetchInst;
const AMDGPUSubtarget &ST;
@ -107,6 +108,35 @@ private:
return TII->get(Opcode);
}
bool isCompatibleWithClause(const MachineInstr *MI,
std::set<unsigned> &DstRegs, std::set<unsigned> &SrcRegs) const {
unsigned DstMI, SrcMI;
for (MachineInstr::const_mop_iterator I = MI->operands_begin(),
E = MI->operands_end(); I != E; ++I) {
const MachineOperand &MO = *I;
if (!MO.isReg())
continue;
if (MO.isDef())
DstMI = MO.getReg();
if (MO.isUse()) {
unsigned Reg = MO.getReg();
if (AMDGPU::R600_Reg128RegClass.contains(Reg))
SrcMI = Reg;
else
SrcMI = TRI.getMatchingSuperReg(Reg,
TRI.getSubRegFromChannel(TRI.getHWRegChan(Reg)),
&AMDGPU::R600_Reg128RegClass);
}
}
if ((DstRegs.find(SrcMI) == DstRegs.end()) &&
(SrcRegs.find(DstMI) == SrcRegs.end())) {
SrcRegs.insert(SrcMI);
DstRegs.insert(DstMI);
return true;
} else
return false;
}
ClauseFile
MakeFetchClause(MachineBasicBlock &MBB, MachineBasicBlock::iterator &I)
const {
@ -114,6 +144,7 @@ private:
std::vector<MachineInstr *> ClauseContent;
unsigned AluInstCount = 0;
bool IsTex = TII->usesTextureCache(ClauseHead);
std::set<unsigned> DstRegs, SrcRegs;
for (MachineBasicBlock::iterator E = MBB.end(); I != E; ++I) {
if (IsTrivialInst(I))
continue;
@ -122,6 +153,8 @@ private:
if ((IsTex && !TII->usesTextureCache(I)) ||
(!IsTex && !TII->usesVertexCache(I)))
break;
if (!isCompatibleWithClause(I, DstRegs, SrcRegs))
break;
AluInstCount ++;
ClauseContent.push_back(I);
}
@ -176,6 +209,7 @@ private:
public:
R600ControlFlowFinalizer(TargetMachine &tm) : MachineFunctionPass(ID),
TII (static_cast<const R600InstrInfo *>(tm.getInstrInfo())),
TRI(TII->getRegisterInfo()),
ST(tm.getSubtarget<AMDGPUSubtarget>()) {
const AMDGPUSubtarget &ST = tm.getSubtarget<AMDGPUSubtarget>();
if (ST.device()->getGeneration() <= AMDGPUDeviceInfo::HD4XXX)