[llvm] r364794 - [ARM] MVE: support QQPRRegClass and QQQQPRRegClass

[Mikhail Maltsev via llvm-commits]

Author: miyuki
Date: Mon Jul  1 09:05:23 2019
New Revision: 364794

URL: http://llvm.org/viewvc/llvm-project?rev=364794&view=rev
Log:
[ARM] MVE: support QQPRRegClass and QQQQPRRegClass

Summary:
QQPRRegClass and QQQQPRRegClass are used by the
interleaving/deinterleaving loads/stores to represent sequences of
consecutive SIMD registers.

Reviewers: ostannard, simon_tatham, dmgreen

Reviewed By: simon_tatham

Subscribers: javed.absar, kristof.beyls, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D64009

Modified:
    llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp

Modified: llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp?rev=364794&r1=364793&r2=364794&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp Mon Jul  1 09:05:23 2019
@@ -1565,8 +1565,9 @@ ARMTargetLowering::getRegClassFor(MVT VT
   (void)isDivergent;
   // Map v4i64 to QQ registers but do not make the type legal. Similarly map
   // v8i64 to QQQQ registers. v4i64 and v8i64 are only used for REG_SEQUENCE to
-  // load / store 4 to 8 consecutive D registers.
-  if (Subtarget->hasNEON()) {
+  // load / store 4 to 8 consecutive NEON D registers, or 2 to 4 consecutive
+  // MVE Q registers.
+  if (Subtarget->hasNEON() || Subtarget->hasMVEIntegerOps()) {
     if (VT == MVT::v4i64)
       return &ARM::QQPRRegClass;
     if (VT == MVT::v8i64)