Revert "Implement suspend checks in new compiler."

This reverts commit 6fbce029fba3ed5da6c36017754ed408e6bcb632.

Change-Id: Ia915c27873b021e658a10212e559095dfc91284e

1 files changed, 4 insertions, 22 deletions

diff --git a/compiler/optimizing/builder.cc b/compiler/optimizing/builder.cc
index 71e71f79d..ecd6802ca 100644
--- a/compiler/optimizing/builder.cc
+++ b/compiler/optimizing/builder.cc
@@ -138,15 +138,13 @@ static bool CanHandleCodeItem(const DexFile::CodeItem& code_item) {
 
 template<typename T>
 void HGraphBuilder::If_22t(const Instruction& instruction, uint32_t dex_offset) {
-  int32_t target_offset = instruction.GetTargetOffset();
-  PotentiallyAddSuspendCheck(target_offset, dex_offset);
   HInstruction* first = LoadLocal(instruction.VRegA(), Primitive::kPrimInt);
   HInstruction* second = LoadLocal(instruction.VRegB(), Primitive::kPrimInt);
   T* comparison = new (arena_) T(first, second);
   current_block_->AddInstruction(comparison);
   HInstruction* ifinst = new (arena_) HIf(comparison);
   current_block_->AddInstruction(ifinst);
-  HBasicBlock* target = FindBlockStartingAt(dex_offset + target_offset);
+  HBasicBlock* target = FindBlockStartingAt(dex_offset + instruction.GetTargetOffset());
   DCHECK(target != nullptr);
   current_block_->AddSuccessor(target);
   target = FindBlockStartingAt(dex_offset + instruction.SizeInCodeUnits());
@@ -157,15 +155,12 @@ void HGraphBuilder::If_22t(const Instruction& instruction, uint32_t dex_offset)
 
 template<typename T>
 void HGraphBuilder::If_21t(const Instruction& instruction, uint32_t dex_offset) {
-  int32_t target_offset = instruction.GetTargetOffset();
-  PotentiallyAddSuspendCheck(target_offset, dex_offset);
   HInstruction* value = LoadLocal(instruction.VRegA(), Primitive::kPrimInt);
   T* comparison = new (arena_) T(value, GetIntConstant(0));
   current_block_->AddInstruction(comparison);
   HInstruction* ifinst = new (arena_) HIf(comparison);
   current_block_->AddInstruction(ifinst);
-  fprintf(stderr, "%d and %d\n", dex_offset, target_offset);
-  HBasicBlock* target = FindBlockStartingAt(dex_offset + target_offset);
+  HBasicBlock* target = FindBlockStartingAt(dex_offset + instruction.GetTargetOffset());
   DCHECK(target != nullptr);
   current_block_->AddSuccessor(target);
   target = FindBlockStartingAt(dex_offset + instruction.SizeInCodeUnits());
@@ -201,9 +196,6 @@ HGraph* HGraphBuilder::BuildGraph(const DexFile::CodeItem& code_item) {
     return nullptr;
   }
 
-  // Add the suspend check to the entry block.
-  entry_block_->AddInstruction(new (arena_) HSuspendCheck(0));
-
   size_t dex_offset = 0;
   while (code_ptr < code_end) {
     // Update the current block if dex_offset starts a new block.
@@ -470,15 +462,7 @@ void HGraphBuilder::BuildArrayAccess(const Instruction& instruction,
   }
 }
 
-void HGraphBuilder::PotentiallyAddSuspendCheck(int32_t target_offset, uint32_t dex_offset) {
-  if (target_offset <= 0) {
-    // Unconditionnally add a suspend check to backward branches. We can remove
-    // them after we recognize loops in the graph.
-    current_block_->AddInstruction(new (arena_) HSuspendCheck(dex_offset));
-  }
-}
-
-bool HGraphBuilder::AnalyzeDexInstruction(const Instruction& instruction, uint32_t dex_offset) {
+bool HGraphBuilder::AnalyzeDexInstruction(const Instruction& instruction, int32_t dex_offset) {
   if (current_block_ == nullptr) {
     return true;  // Dead code
   }
@@ -596,9 +580,7 @@ bool HGraphBuilder::AnalyzeDexInstruction(const Instruction& instruction, uint32
     case Instruction::GOTO:
     case Instruction::GOTO_16:
     case Instruction::GOTO_32: {
-      int32_t offset = instruction.GetTargetOffset();
-      PotentiallyAddSuspendCheck(offset, dex_offset);
-      HBasicBlock* target = FindBlockStartingAt(offset + dex_offset);
+      HBasicBlock* target = FindBlockStartingAt(instruction.GetTargetOffset() + dex_offset);
       DCHECK(target != nullptr);
       current_block_->AddInstruction(new (arena_) HGoto());
       current_block_->AddSuccessor(target);