Make SIMD checker tests more robust.

Rationale:
With more and more peeling and cleanup loops coming up,
some of our checker tests were a bit fragile testing for
the first Phi occurrence. This CL fixes that. Also fixes
a few omissions found during the refactoring.

Test: test-art-host test-art-target
Change-Id: I9b27237cf048981ca2b5a18057e09211b7002486
diff --git a/test/640-checker-boolean-simd/src/Main.java b/test/640-checker-boolean-simd/src/Main.java
index c337ef4..347f916 100644
--- a/test/640-checker-boolean-simd/src/Main.java
+++ b/test/640-checker-boolean-simd/src/Main.java
@@ -26,25 +26,21 @@
   //
 
   /// CHECK-START: void Main.and(boolean) loop_optimization (before)
-  /// CHECK-DAG: Phi      loop:<<Loop:B\d+>> outer_loop:none
-  /// CHECK-DAG: ArrayGet loop:<<Loop>>      outer_loop:none
+  /// CHECK-DAG: ArrayGet loop:<<Loop:B\d+>> outer_loop:none
   /// CHECK-DAG: ArraySet loop:<<Loop>>      outer_loop:none
   //
   /// CHECK-START-ARM: void Main.and(boolean) loop_optimization (after)
-  /// CHECK-DAG: Phi      loop:<<Loop:B\d+>> outer_loop:none
-  /// CHECK-DAG: VecLoad  loop:<<Loop>>      outer_loop:none
+  /// CHECK-DAG: VecLoad  loop:<<Loop:B\d+>> outer_loop:none
   /// CHECK-DAG: VecAnd   loop:<<Loop>>      outer_loop:none
   /// CHECK-DAG: VecStore loop:<<Loop>>      outer_loop:none
   //
   /// CHECK-START-ARM64: void Main.and(boolean) loop_optimization (after)
-  /// CHECK-DAG: Phi      loop:<<Loop:B\d+>> outer_loop:none
-  /// CHECK-DAG: VecLoad  loop:<<Loop>>      outer_loop:none
+  /// CHECK-DAG: VecLoad  loop:<<Loop:B\d+>> outer_loop:none
   /// CHECK-DAG: VecAnd   loop:<<Loop>>      outer_loop:none
   /// CHECK-DAG: VecStore loop:<<Loop>>      outer_loop:none
   //
   /// CHECK-START-MIPS64: void Main.and(boolean) loop_optimization (after)
-  /// CHECK-DAG: Phi      loop:<<Loop:B\d+>> outer_loop:none
-  /// CHECK-DAG: VecLoad  loop:<<Loop>>      outer_loop:none
+  /// CHECK-DAG: VecLoad  loop:<<Loop:B\d+>> outer_loop:none
   /// CHECK-DAG: VecAnd   loop:<<Loop>>      outer_loop:none
   /// CHECK-DAG: VecStore loop:<<Loop>>      outer_loop:none
   static void and(boolean x) {
@@ -53,25 +49,21 @@
   }
 
   /// CHECK-START: void Main.or(boolean) loop_optimization (before)
-  /// CHECK-DAG: Phi      loop:<<Loop:B\d+>> outer_loop:none
-  /// CHECK-DAG: ArrayGet loop:<<Loop>>      outer_loop:none
+  /// CHECK-DAG: ArrayGet loop:<<Loop:B\d+>> outer_loop:none
   /// CHECK-DAG: ArraySet loop:<<Loop>>      outer_loop:none
   //
   /// CHECK-START-ARM: void Main.or(boolean) loop_optimization (after)
-  /// CHECK-DAG: Phi      loop:<<Loop:B\d+>> outer_loop:none
-  /// CHECK-DAG: VecLoad  loop:<<Loop>>      outer_loop:none
+  /// CHECK-DAG: VecLoad  loop:<<Loop:B\d+>> outer_loop:none
   /// CHECK-DAG: VecOr    loop:<<Loop>>      outer_loop:none
   /// CHECK-DAG: VecStore loop:<<Loop>>      outer_loop:none
   //
   /// CHECK-START-ARM64: void Main.or(boolean) loop_optimization (after)
-  /// CHECK-DAG: Phi      loop:<<Loop:B\d+>> outer_loop:none
-  /// CHECK-DAG: VecLoad  loop:<<Loop>>      outer_loop:none
+  /// CHECK-DAG: VecLoad  loop:<<Loop:B\d+>> outer_loop:none
   /// CHECK-DAG: VecOr    loop:<<Loop>>      outer_loop:none
   /// CHECK-DAG: VecStore loop:<<Loop>>      outer_loop:none
   //
   /// CHECK-START-MIPS64: void Main.or(boolean) loop_optimization (after)
-  /// CHECK-DAG: Phi      loop:<<Loop:B\d+>> outer_loop:none
-  /// CHECK-DAG: VecLoad  loop:<<Loop>>      outer_loop:none
+  /// CHECK-DAG: VecLoad  loop:<<Loop:B\d+>> outer_loop:none
   /// CHECK-DAG: VecOr    loop:<<Loop>>      outer_loop:none
   /// CHECK-DAG: VecStore loop:<<Loop>>      outer_loop:none
   static void or(boolean x) {
@@ -80,25 +72,21 @@
   }
 
   /// CHECK-START: void Main.xor(boolean) loop_optimization (before)
-  /// CHECK-DAG: Phi      loop:<<Loop:B\d+>> outer_loop:none
-  /// CHECK-DAG: ArrayGet loop:<<Loop>>      outer_loop:none
+  /// CHECK-DAG: ArrayGet loop:<<Loop:B\d+>> outer_loop:none
   /// CHECK-DAG: ArraySet loop:<<Loop>>      outer_loop:none
   //
   /// CHECK-START-ARM: void Main.xor(boolean) loop_optimization (after)
-  /// CHECK-DAG: Phi      loop:<<Loop:B\d+>> outer_loop:none
-  /// CHECK-DAG: VecLoad  loop:<<Loop>>      outer_loop:none
+  /// CHECK-DAG: VecLoad  loop:<<Loop:B\d+>> outer_loop:none
   /// CHECK-DAG: VecXor   loop:<<Loop>>      outer_loop:none
   /// CHECK-DAG: VecStore loop:<<Loop>>      outer_loop:none
   //
   /// CHECK-START-ARM64: void Main.xor(boolean) loop_optimization (after)
-  /// CHECK-DAG: Phi      loop:<<Loop:B\d+>> outer_loop:none
-  /// CHECK-DAG: VecLoad  loop:<<Loop>>      outer_loop:none
+  /// CHECK-DAG: VecLoad  loop:<<Loop:B\d+>> outer_loop:none
   /// CHECK-DAG: VecXor   loop:<<Loop>>      outer_loop:none
   /// CHECK-DAG: VecStore loop:<<Loop>>      outer_loop:none
   //
   /// CHECK-START-MIPS64: void Main.xor(boolean) loop_optimization (after)
-  /// CHECK-DAG: Phi      loop:<<Loop:B\d+>> outer_loop:none
-  /// CHECK-DAG: VecLoad  loop:<<Loop>>      outer_loop:none
+  /// CHECK-DAG: VecLoad  loop:<<Loop:B\d+>> outer_loop:none
   /// CHECK-DAG: VecXor   loop:<<Loop>>      outer_loop:none
   /// CHECK-DAG: VecStore loop:<<Loop>>      outer_loop:none
   static void xor(boolean x) {
@@ -107,25 +95,21 @@
   }
 
   /// CHECK-START: void Main.not() loop_optimization (before)
-  /// CHECK-DAG: Phi      loop:<<Loop:B\d+>> outer_loop:none
-  /// CHECK-DAG: ArrayGet loop:<<Loop>>      outer_loop:none
+  /// CHECK-DAG: ArrayGet loop:<<Loop:B\d+>> outer_loop:none
   /// CHECK-DAG: ArraySet loop:<<Loop>>      outer_loop:none
   //
   /// CHECK-START-ARM: void Main.not() loop_optimization (after)
-  /// CHECK-DAG: Phi      loop:<<Loop:B\d+>> outer_loop:none
-  /// CHECK-DAG: VecLoad  loop:<<Loop>>      outer_loop:none
+  /// CHECK-DAG: VecLoad  loop:<<Loop:B\d+>> outer_loop:none
   /// CHECK-DAG: VecNot   loop:<<Loop>>      outer_loop:none
   /// CHECK-DAG: VecStore loop:<<Loop>>      outer_loop:none
   //
   /// CHECK-START-ARM64: void Main.not() loop_optimization (after)
-  /// CHECK-DAG: Phi      loop:<<Loop:B\d+>> outer_loop:none
-  /// CHECK-DAG: VecLoad  loop:<<Loop>>      outer_loop:none
+  /// CHECK-DAG: VecLoad  loop:<<Loop:B\d+>> outer_loop:none
   /// CHECK-DAG: VecNot   loop:<<Loop>>      outer_loop:none
   /// CHECK-DAG: VecStore loop:<<Loop>>      outer_loop:none
   //
   /// CHECK-START-MIPS64: void Main.not() loop_optimization (after)
-  /// CHECK-DAG: Phi      loop:<<Loop:B\d+>> outer_loop:none
-  /// CHECK-DAG: VecLoad  loop:<<Loop>>      outer_loop:none
+  /// CHECK-DAG: VecLoad  loop:<<Loop:B\d+>> outer_loop:none
   /// CHECK-DAG: VecNot   loop:<<Loop>>      outer_loop:none
   /// CHECK-DAG: VecStore loop:<<Loop>>      outer_loop:none
   static void not() {