ARM: ART Vectorizer (64-bit vectors).
Basic vectorization support with 64-bit vector length on ARM 32-bit
platforms (128-bit vectors require massive changes in register
allocator).
Test: test-art-target, test-art-host
Change-Id: I1d740146c3f00170fc033ae5fd69d59321ddcbf4
diff --git a/compiler/optimizing/loop_optimization.cc b/compiler/optimizing/loop_optimization.cc
index 9c8a632..bfb23f1 100644
--- a/compiler/optimizing/loop_optimization.cc
+++ b/compiler/optimizing/loop_optimization.cc
@@ -1021,6 +1021,23 @@
switch (compiler_driver_->GetInstructionSet()) {
case kArm:
case kThumb2:
+ // Allow vectorization for all ARM devices, because Android assumes that
+ // ARM 32-bit always supports advanced SIMD.
+ switch (type) {
+ case Primitive::kPrimBoolean:
+ case Primitive::kPrimByte:
+ *restrictions |= kNoDiv;
+ return TrySetVectorLength(8);
+ case Primitive::kPrimChar:
+ case Primitive::kPrimShort:
+ *restrictions |= kNoDiv | kNoStringCharAt;
+ return TrySetVectorLength(4);
+ case Primitive::kPrimInt:
+ *restrictions |= kNoDiv;
+ return TrySetVectorLength(2);
+ default:
+ break;
+ }
return false;
case kArm64:
// Allow vectorization for all ARM devices, because Android assumes that