Reland "Make compiler/optimizing/ symbols hidden."
This reverts commit 0a51605ddd81635135463dab08b6f7c21b58ffb0.
Reason for revert: Reland after some of the required work
was merged in other CLs.
Also address a TODO from the original CL to mark required
symbols with EXPORT in `intrinsic_objects.h`.
Also mark symbols in new files as HIDDEN.
Bug: 186902856
Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Change-Id: I936d448983928af23614ca82c2d0bf9a645e2c52
diff --git a/compiler/optimizing/ssa_phi_elimination.h b/compiler/optimizing/ssa_phi_elimination.h
index c5cc752..f606f92 100644
--- a/compiler/optimizing/ssa_phi_elimination.h
+++ b/compiler/optimizing/ssa_phi_elimination.h
@@ -17,10 +17,11 @@
#ifndef ART_COMPILER_OPTIMIZING_SSA_PHI_ELIMINATION_H_
#define ART_COMPILER_OPTIMIZING_SSA_PHI_ELIMINATION_H_
+#include "base/macros.h"
#include "nodes.h"
#include "optimization.h"
-namespace art {
+namespace art HIDDEN {
/**
* Optimization phase that removes dead phis from the graph. Dead phis are unused