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authorQuentin Carbonneaux <quentin.carbonneaux@yale.edu>2015-03-31 16:02:53 -0400
committerQuentin Carbonneaux <quentin.carbonneaux@yale.edu>2015-03-31 16:02:53 -0400
commitf00bc00ed6bce632f5759203f6995b5141caa3ef (patch)
treee12ce99dda5f5f2b8898ff527d0f9123b41b5c93 /TODO
parentb330009493aa0f7a3098e89581ddba0240a1f734 (diff)
downloadroux-f00bc00ed6bce632f5759203f6995b5141caa3ef.tar.gz
add bugs
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@@ -18,4 +18,13 @@ Types
 - Pointer to type "t"
 
 Questions
-- Should we allow constant operands?
+- Q: Should we allow constant operands?
+  A:
+  It looks like `Con instructions are a bad idea because
+  they introduce spurious live ranges.
+
+Problems
+- x = y op z
+  if x is spilled, y can be moved to a spill location
+  to free one register for x, this is kind of stupid.
+- Phi defined variables with spill location do not work.