Revert "[optimizing] Improve x86 parallel moves/swaps"

This reverts commit a5c19ce8d200d68a528f2ce0ebff989106c4a933.

This commit introduces a performance regression on CaffeineLogic of 30%.

Change-Id: I917e206e249d44e1748537bc1b2d31054ea4959d

1 files changed, 0 insertions, 24 deletions

diff --git a/compiler/optimizing/parallel_move_resolver.cc b/compiler/optimizing/parallel_move_resolver.cc
index 4936685367..9df8f5640d 100644
--- a/compiler/optimizing/parallel_move_resolver.cc
+++ b/compiler/optimizing/parallel_move_resolver.cc
@@ -269,20 +269,6 @@ 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),
@@ -296,16 +282,6 @@ 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_);