ART: Fix MonitorExit code on ARM
We do not emit barriers on non-SMP systems. But on ARM, we have
places that need to conditionally execute, which is done through
an IT instruction. The guide of said instruction thus changes
between SMP and non-SMP systems.
To cleanly approach this, change the API so that GenMemBarrier
returns whether it generated an instruction. ARM will have to
query the result and update any dependent IT.
Throw a build system error if TARGET_CPU_SMP is not set.
Fix runtime/Android.mk to work with new multilib host.
Bug: 14989275
Change-Id: I9e611b770e8a1cd4ca19367d7dae0573ec08dc61
diff --git a/compiler/dex/quick/arm64/codegen_arm64.h b/compiler/dex/quick/arm64/codegen_arm64.h
index af0029c..418a989 100644
--- a/compiler/dex/quick/arm64/codegen_arm64.h
+++ b/compiler/dex/quick/arm64/codegen_arm64.h
@@ -142,7 +142,7 @@
void GenFusedFPCmpBranch(BasicBlock* bb, MIR* mir, bool gt_bias, bool is_double);
void GenFusedLongCmpBranch(BasicBlock* bb, MIR* mir);
void GenSelect(BasicBlock* bb, MIR* mir);
- void GenMemBarrier(MemBarrierKind barrier_kind);
+ bool GenMemBarrier(MemBarrierKind barrier_kind);
void GenMonitorEnter(int opt_flags, RegLocation rl_src);
void GenMonitorExit(int opt_flags, RegLocation rl_src);
void GenMoveException(RegLocation rl_dest);