Simplify boolean condition compared to 0
CaffeineMarkRR Logic has some boolean flipping which can be helped by
some simplification.
Simplify non-FP (A COND_OP B) != 0 to A OPPOSITE_COND_OP B.
This is better than the original code, which would use a HBooleanNot
after the condition.
Also simplify non-FP (A COND_OP B) == 1 to A OPPOSITE_COND_OP B.
Move GetOppositeCondition to nodes.h/nodes.cc to share with Boolean
Simplification, renaming it to InsertOppositeCondition, as it inserts
the new HInstruction (unless it is a constant).
Change-Id: I34ded7758836e375de0d6fdba9239d2d451928d0
Signed-off-by: Mark Mendell <mark.p.mendell@intel.com>
diff --git a/compiler/optimizing/nodes.h b/compiler/optimizing/nodes.h
index 4f894b0..744067f 100644
--- a/compiler/optimizing/nodes.h
+++ b/compiler/optimizing/nodes.h
@@ -371,6 +371,11 @@
bool HasTryCatch() const { return has_try_catch_; }
void SetHasTryCatch(bool value) { has_try_catch_ = value; }
+ // Returns an instruction with the opposite boolean value from 'cond'.
+ // The instruction has been inserted into the graph, either as a constant, or
+ // before cursor.
+ HInstruction* InsertOppositeCondition(HInstruction* cond, HInstruction* cursor);
+
private:
void FindBackEdges(ArenaBitVector* visited);
void RemoveInstructionsAsUsersFromDeadBlocks(const ArenaBitVector& visited) const;