Model some vst3 and vst4 with reg_sequence.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103453 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/NEONPreAllocPass.cpp b/lib/Target/ARM/NEONPreAllocPass.cpp
index 538247a..5a5dd29 100644
--- a/lib/Target/ARM/NEONPreAllocPass.cpp
+++ b/lib/Target/ARM/NEONPreAllocPass.cpp
@@ -392,15 +392,19 @@
VirtReg = DefMI->getOperand(1).getReg();
if (LastSrcReg && LastSrcReg != VirtReg)
return false;
+ LastSrcReg = VirtReg;
const TargetRegisterClass *RC = MRI->getRegClass(VirtReg);
- if (NumRegs == 2) {
- if (RC != ARM::QPRRegisterClass)
- return false;
- } else if (RC != ARM::QQPRRegisterClass)
+ if (RC != ARM::QPRRegisterClass && RC != ARM::QQPRRegisterClass)
return false;
unsigned SubIdx = DefMI->getOperand(2).getImm();
- if (LastSubIdx && LastSubIdx != SubIdx-1)
- return false;
+ if (LastSubIdx) {
+ if (LastSubIdx != SubIdx-1)
+ return false;
+ } else {
+ // Must start from arm_dsubreg_0 or arm_qsubreg_0.
+ if (SubIdx != ARM::DSUBREG_0 && SubIdx != ARM::QSUBREG_0)
+ return false;
+ }
LastSubIdx = SubIdx;
}
return true;