From 246a48ba94b92e6c1e02964d46269e0903b7a723 Mon Sep 17 00:00:00 2001
From: Quentin Carbonneaux <quentin.carbonneaux@yale.edu>
Date: Wed, 5 Aug 2015 11:37:10 -0400
Subject: start work on comparisons

There are two things I overlooked so far.

1. Binary instructions like cmp that do not have a result
   in registers need the size suffix sometimes, for example
   when comparing a spill location with a constant.

2. The register allocator needs to be adapted to support the
   comparison instruction: it is not possible to compare two
   spill locations without using a register.
---
 lisc/test/cup.ssa | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 lisc/test/cup.ssa

(limited to 'lisc/test')

diff --git a/lisc/test/cup.ssa b/lisc/test/cup.ssa
new file mode 100644
index 0000000..64f2ab4
--- /dev/null
+++ b/lisc/test/cup.ssa
@@ -0,0 +1,10 @@
+# counts up
+
+@start
+@loop
+	%n0  =w phi @start -1988, @loop %n1
+	%n1  =w add 1, %n0
+	%cmp =w csle %n1, 1000
+	jez %cmp, @end, @loop
+@end
+	ret
-- 
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