Make GVN aware of instructions that write to CPU flags.

2017-10-19 12:57:55 -07:00
parent bce3c38042
commit cc0bb70c5d
4 changed files with 29 additions and 1 deletions
--- a/lib/cretonne/meta/cdsl/operands.py
+++ b/lib/cretonne/meta/cdsl/operands.py
@@ -242,3 +242,10 @@ class Operand(object):
        dependency.
        """
        return self.kind is not VALUE and self.kind is not VARIABLE_ARGS
+
+    def is_cpu_flags(self):
+        # type: () -> bool
+        """
+        Is this a CPU flags operand?
+        """
+        return self.kind is VALUE and self.typevar.name in ['iflags', 'fflags']