[Mono-bugs] [Bug 61899][Wis] New - [PATCH] Speed up copy/cons propagation

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Changed by bmaurer@users.sf.net.

http://bugzilla.ximian.com/show_bug.cgi?id=61899

--- shadow/61899	2004-07-24 01:51:38.000000000 -0400
+++ shadow/61899.tmp.2902	2004-07-24 01:51:38.000000000 -0400
@@ -0,0 +1,27 @@
+Bug#: 61899
+Product: Mono: Runtime
+Version: unspecified
+OS: 
+OS Details: 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Wishlist
+Component: misc
+AssignedTo: mono-bugs@ximian.com                            
+ReportedBy: bmaurer@users.sf.net               
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: [PATCH] Speed up copy/cons propagation
+
+This patch removes two redundant computations in copyprop:
+
+* Before, we would visit each inst to check for kill effects. However, we
+only need to do this if there are variables whose address has been taken.
+
+* Since cprop already calls the cfold pass, there is no need to do a
+seperate round of constant folding.
+
+Together, these changes make it so that -O=copyprop does not impact jit time.