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Model vld2 / vst2 with reg_sequence.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103411 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2010-05-10 17:34:18 +00:00
parent 623d3c10e1
commit 603afbfe2a
3 changed files with 95 additions and 18 deletions
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9
lib/Target/ARM/NEONPreAllocPass.cpp
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@@ -360,7 +360,7 @@ bool NEONPreAllocPass::FormsRegSequence(MachineInstr *MI,
return false;
RegSeq = UseMI;
} else {
// Extracting from a Q register.
// Extracting from a Q or QQ register.
MachineInstr *DefMI = MRI->getVRegDef(VirtReg);
if (!DefMI || !DefMI->isExtractSubreg())
return false;
@@ -368,8 +368,11 @@ bool NEONPreAllocPass::FormsRegSequence(MachineInstr *MI,
if (LastSrcReg && LastSrcReg != VirtReg)
return false;
const TargetRegisterClass *RC = MRI->getRegClass(VirtReg);
if (RC != ARM::QPRRegisterClass)
return false;
if (NumRegs == 2) {
if (RC != ARM::QPRRegisterClass)
return false;
} else if (RC != ARM::QQPRRegisterClass)
return false;
unsigned SubIdx = DefMI->getOperand(2).getImm();
if (LastSubIdx && LastSubIdx != SubIdx-1)
return false;