diff options
Diffstat (limited to 'compiler/optimizing/induction_var_range.cc')
| -rw-r--r-- | compiler/optimizing/induction_var_range.cc | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/compiler/optimizing/induction_var_range.cc b/compiler/optimizing/induction_var_range.cc index 089340e715..191d3d128c 100644 --- a/compiler/optimizing/induction_var_range.cc +++ b/compiler/optimizing/induction_var_range.cc @@ -670,6 +670,15 @@ InductionVarRange::Value InductionVarRange::GetFetch(HInstruction* instruction, return AddValue(GetFetch(instruction->InputAt(0), trip, in_body, is_min), Value(static_cast<int32_t>(value))); } + } else if (instruction->IsSub()) { + // Incorporate suitable constants in the chased value. + if (IsInt64AndGet(instruction->InputAt(0), &value) && CanLongValueFitIntoInt(value)) { + return SubValue(Value(static_cast<int32_t>(value)), + GetFetch(instruction->InputAt(1), trip, in_body, !is_min)); + } else if (IsInt64AndGet(instruction->InputAt(1), &value) && CanLongValueFitIntoInt(value)) { + return SubValue(GetFetch(instruction->InputAt(0), trip, in_body, is_min), + Value(static_cast<int32_t>(value))); + } } else if (instruction->IsArrayLength()) { // Exploit length properties when chasing constants or chase into a new array declaration. if (chase_hint_ == nullptr) { |