[Mono-bugs] [Bug 42136][Nor] Changed - [mini] register allocation problem in exception handlers

bugzilla-daemon@rocky.ximian.com bugzilla-daemon@rocky.ximian.com
Wed, 30 Apr 2003 10:32:03 -0400 (EDT)

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Changed by lupus@ximian.com.


--- shadow/42136	Wed Apr 30 05:59:32 2003
+++ shadow/42136.tmp.31345	Wed Apr 30 10:32:03 2003
@@ -2,13 +2,13 @@
 Product: Mono/Runtime
 Version: unspecified
 OS: Debian Woody
 OS Details: 
 Status: NEW   
+Severity: Unknown
 Priority: Normal
 Component: misc
 AssignedTo: mono-bugs@ximian.com                            
 ReportedBy: vargaz@freemail.hu               
 QAContact: mono-bugs@ximian.com
 TargetMilestone: ---
@@ -25,6 +25,15 @@
 I reported this earlier by mail but it seems to have been forgotten.
 ------- Additional Comments From vargaz@freemail.hu  2003-04-30 05:59 -------
 Created an attachment (id=4163)
+------- Additional Comments From lupus@ximian.com  2003-04-30 10:32 -------
+The issue here is that the liveness code seems to not take into account
+the possibility that control flow jumps from the middle of a basic
+block to an exception handler. I guess this may happen in non-shared
+code, too. The fix may be to extend the lifeness of a variable that is
+used in the exception handlers to the whole region of code the handler
+refers to, if the variable was used outside.
+The change is too big to do just before a release, though.