Fix more register allocation bugs in optimized code on ARM.

tests/language/language.status

Index: tests/language/language.status
===================================================================
--- tests/language/language.status	(revision 24190)
+++ tests/language/language.status	(working copy)
@@ -527,15 +527,14 @@
 super_call4_test: Fail, OK # hardcoded names.
 
 [ $arch == simarm || $arch == arm ]
-bit_operations_test: Crash, Fail
+bit_operations_test: Pass, Crash, Fail # Crashes (debug) and fails (release) on Mac.
 deopt_smi_op_test: Fail
 gc_test: Crash
 invocation_mirror_test: Fail
-load_to_load_forwarding_vm_test: Fail
 named_parameters_with_conversions_test: Pass, Crash
-arithmetic_test: Pass, Crash, Fail # Fails on Mac
-left_shift_test: Pass, Fail # Fails on Mac
-positive_bit_operations_test: Pass, Fail, Crash # Fails and crashes on Mac
+arithmetic_test: Pass, Fail # Fails on Mac.
+left_shift_test: Pass, Fail # Fails on Mac.
+positive_bit_operations_test: Pass, Fail, Crash # Crashes (debug) and fails (release) on Mac.
 
 # large_implicit_getter_test Passes on ReleaseARM, Crashes in SIMARM and
 # DebugARM. Should crash on ReleaseARM, but there is no exception on an
@@ -545,9 +544,6 @@
 stack_overflow_test: Crash, Pass
 stack_overflow_stacktrace_test: Crash, Pass
 
-[ ($arch == simarm || $arch == arm) && $mode == debug ]
-char_escape_test: Pass, Crash
-
 [ $arch == mips ]
 *: Skip