Implement System.arraycopy intrinsic for arm.
Change-Id: I58ae1af5103e281fe59fbe022b718d6d8f293a5e
diff --git a/compiler/optimizing/code_generator.cc b/compiler/optimizing/code_generator.cc
index 2897006..6a743eb 100644
--- a/compiler/optimizing/code_generator.cc
+++ b/compiler/optimizing/code_generator.cc
@@ -41,6 +41,7 @@
#include "driver/dex_compilation_unit.h"
#include "gc_map_builder.h"
#include "graph_visualizer.h"
+#include "intrinsics.h"
#include "leb128.h"
#include "mapping_table.h"
#include "mirror/array-inl.h"
@@ -1381,4 +1382,57 @@
}
}
+void CodeGenerator::CreateSystemArrayCopyLocationSummary(HInvoke* invoke) {
+ // Check to see if we have known failures that will cause us to have to bail out
+ // to the runtime, and just generate the runtime call directly.
+ HIntConstant* src_pos = invoke->InputAt(1)->AsIntConstant();
+ HIntConstant* dest_pos = invoke->InputAt(3)->AsIntConstant();
+
+ // The positions must be non-negative.
+ if ((src_pos != nullptr && src_pos->GetValue() < 0) ||
+ (dest_pos != nullptr && dest_pos->GetValue() < 0)) {
+ // We will have to fail anyways.
+ return;
+ }
+
+ // The length must be >= 0.
+ HIntConstant* length = invoke->InputAt(4)->AsIntConstant();
+ if (length != nullptr) {
+ int32_t len = length->GetValue();
+ if (len < 0) {
+ // Just call as normal.
+ return;
+ }
+ }
+
+ SystemArrayCopyOptimizations optimizations(invoke);
+
+ if (optimizations.GetDestinationIsSource()) {
+ if (src_pos != nullptr && dest_pos != nullptr && src_pos->GetValue() < dest_pos->GetValue()) {
+ // We only support backward copying if source and destination are the same.
+ return;
+ }
+ }
+
+ if (optimizations.GetDestinationIsPrimitiveArray() || optimizations.GetSourceIsPrimitiveArray()) {
+ // We currently don't intrinsify primitive copying.
+ return;
+ }
+
+ ArenaAllocator* allocator = invoke->GetBlock()->GetGraph()->GetArena();
+ LocationSummary* locations = new (allocator) LocationSummary(invoke,
+ LocationSummary::kCallOnSlowPath,
+ kIntrinsified);
+ // arraycopy(Object src, int src_pos, Object dest, int dest_pos, int length).
+ locations->SetInAt(0, Location::RequiresRegister());
+ locations->SetInAt(1, Location::RegisterOrConstant(invoke->InputAt(1)));
+ locations->SetInAt(2, Location::RequiresRegister());
+ locations->SetInAt(3, Location::RegisterOrConstant(invoke->InputAt(3)));
+ locations->SetInAt(4, Location::RegisterOrConstant(invoke->InputAt(4)));
+
+ locations->AddTemp(Location::RequiresRegister());
+ locations->AddTemp(Location::RequiresRegister());
+ locations->AddTemp(Location::RequiresRegister());
+}
+
} // namespace art