Optimize suspend checks in optimizing compiler.

- Remove the ones added during graph build (they were added
  for the baseline code generator).
- Emit them at loop back edges after phi moves, so that the test
  can directly jump to the loop header.
- Fix x86 and x86_64 suspend check by using cmpw instead of cmpl.

Change-Id: I6fad5795a55705d86c9e1cb85bf5d63dadfafa2a

1 files changed, 4 insertions, 0 deletions

diff --git a/compiler/optimizing/locations.h b/compiler/optimizing/locations.h
index 06623b6adc..3a769dfd3c 100644
--- a/compiler/optimizing/locations.h
+++ b/compiler/optimizing/locations.h
@@ -363,6 +363,10 @@ class LocationSummary : public ArenaObject {
     stack_mask_->SetBit(index);
   }
 
+  void ClearStackBit(uint32_t index) {
+    stack_mask_->ClearBit(index);
+  }
+
   void SetRegisterBit(uint32_t reg_id) {
     register_mask_ |= (1 << reg_id);
   }