type conversion elimination for constant input
type conversion on constant input can be eliminated if the constant
value falls in the result type's range.
Test: run-test on host, 711-checker-type-conversion
Change-Id: I372139d681aa06fa6e760d7814c86ac949292813
diff --git a/compiler/optimizing/instruction_simplifier.cc b/compiler/optimizing/instruction_simplifier.cc
index fbfee12..a6dfa47 100644
--- a/compiler/optimizing/instruction_simplifier.cc
+++ b/compiler/optimizing/instruction_simplifier.cc
@@ -1159,6 +1159,16 @@
RecordSimplification();
return;
}
+ } else if (input->IsIntConstant()) {
+ // Try to eliminate type conversion on int constant whose value falls into
+ // the range of the result type.
+ int32_t value = input->AsIntConstant()->GetValue();
+ if (DataType::IsTypeConversionImplicit(value, result_type)) {
+ instruction->ReplaceWith(input);
+ instruction->GetBlock()->RemoveInstruction(instruction);
+ RecordSimplification();
+ return;
+ }
}
}