Block callee save fp registers in debuggable.
This is a simple but conservative implementation. We could
extend it by using the registers but still saving them before
a call and at method entry.
bug: 21057237
Change-Id: Ia2e9e0e2efae0b01625e0f4165d0535c4bf9ba62
diff --git a/compiler/optimizing/code_generator_arm64.cc b/compiler/optimizing/code_generator_arm64.cc
index 39d6db7..c7ade65 100644
--- a/compiler/optimizing/code_generator_arm64.cc
+++ b/compiler/optimizing/code_generator_arm64.cc
@@ -864,7 +864,12 @@
while (!reserved_core_baseline_registers.IsEmpty()) {
blocked_core_registers_[reserved_core_baseline_registers.PopLowestIndex().code()] = true;
}
+ }
+ if (is_baseline || GetGraph()->IsDebuggable()) {
+ // Stubs do not save callee-save floating point registers. If the graph
+ // is debuggable, we need to deal with these registers differently. For
+ // now, just block them.
CPURegList reserved_fp_baseline_registers = callee_saved_fp_registers;
while (!reserved_fp_baseline_registers.IsEmpty()) {
blocked_fpu_registers_[reserved_fp_baseline_registers.PopLowestIndex().code()] = true;