ARM: Add a postRA pass to legalize stack offsets. Greedy approach (reserve IP).

pydir/crosstest.py

Index: pydir/crosstest.py
diff --git a/pydir/crosstest.py b/pydir/crosstest.py
index 7a479c3963da094f0a10f4724449c7047e8dc33a..c8ab30678cbd29c59926652bc43f33798ff5d105 100755
--- a/pydir/crosstest.py
+++ b/pydir/crosstest.py
@@ -29,8 +29,13 @@ def main():
                  'arm32': targets.ARM32Target }
     arch_sz_flags = { 'x8632': [],
                       'x8664': [],
-                      # TODO(jvoung): remove skip-unimplemented when implemented
-                      'arm32': ['--skip-unimplemented']
+                      # TODO(jvoung): remove skip-unimplemented when
+                      # implemented.
+                      # For ARM, test a large stack offset as well, until we
+                      # are more confident. +/- 4095 is the limit, so test
+                      # somewhere near that boundary.
+                      'arm32': ['--skip-unimplemented',
+                                '--test-stack-extra', '4084']
     }
     arch_llc_flags_extra = {
         # Use sse2 instructions regardless of input -mattr