diff options
Diffstat (limited to 'compiler/optimizing/parallel_move_resolver.cc')
| -rw-r--r-- | compiler/optimizing/parallel_move_resolver.cc | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/compiler/optimizing/parallel_move_resolver.cc b/compiler/optimizing/parallel_move_resolver.cc index 9df8f5640d..4936685367 100644 --- a/compiler/optimizing/parallel_move_resolver.cc +++ b/compiler/optimizing/parallel_move_resolver.cc @@ -269,6 +269,20 @@ int ParallelMoveResolver::AllocateScratchRegister(int blocked, } +int ParallelMoveResolver::AllocateScratchRegister(int blocked, + int register_count) { + int scratch = -1; + for (int reg = 0; reg < register_count; ++reg) { + if ((blocked != reg) && IsScratchLocation(Location::RegisterLocation(reg))) { + scratch = reg; + break; + } + } + + return scratch; +} + + ParallelMoveResolver::ScratchRegisterScope::ScratchRegisterScope( ParallelMoveResolver* resolver, int blocked, int if_scratch, int number_of_registers) : resolver_(resolver), @@ -282,6 +296,16 @@ ParallelMoveResolver::ScratchRegisterScope::ScratchRegisterScope( } +ParallelMoveResolver::ScratchRegisterScope::ScratchRegisterScope( + ParallelMoveResolver* resolver, int blocked, int number_of_registers) + : resolver_(resolver), + reg_(kNoRegister), + spilled_(false) { + // We don't want to spill a register if none are free. + reg_ = resolver_->AllocateScratchRegister(blocked, number_of_registers); +} + + ParallelMoveResolver::ScratchRegisterScope::~ScratchRegisterScope() { if (spilled_) { resolver_->RestoreScratch(reg_); |