Basic block combine pass
Combine basic blocks terminated by instruction that we have since
proven not to throw. This change is intended to relieve some of the
computational load for llvm by reducing the number of basic blocks
it has to contend with.
Also:
Add stats to show how successful check elimination is.
Restore mechanism to disable some expensive optimization passes when
compiling large methods.
Change-Id: I7fae22160988cbefb90ea9fb1cc26d7364e8d229
diff --git a/src/compiler/codegen/CodegenUtil.cc b/src/compiler/codegen/CodegenUtil.cc
index 3aea76a..bdc2c8b 100644
--- a/src/compiler/codegen/CodegenUtil.cc
+++ b/src/compiler/codegen/CodegenUtil.cc
@@ -998,5 +998,20 @@
}
}
+/*
+ * Set up special LIR to mark a Dalvik byte-code instruction start and
+ * record it in the boundaryMap. NOTE: in cases such as kMirOpCheck in
+ * which we split a single Dalvik instruction, only the first MIR op
+ * associated with a Dalvik PC should be entered into the map.
+ */
+LIR* markBoundary(CompilationUnit* cUnit, int offset, const char* instStr)
+{
+ LIR* res = newLIR1(cUnit, kPseudoDalvikByteCodeBoundary, (intptr_t) instStr);
+ if (cUnit->boundaryMap.find(offset) == cUnit->boundaryMap.end()) {
+ cUnit->boundaryMap.Put(offset, res);
+ }
+ return res;
+}
-} // namespace art
+}
+ // namespace art