[Mono-bugs] [Bug 77893][Nor] Changed - SSA PRE corrupts memory on Array.Sort

bugzilla-daemon at bugzilla.ximian.com bugzilla-daemon at bugzilla.ximian.com
Thu Mar 30 09:28:15 EST 2006

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Changed by massi at ximian.com.


--- shadow/77893	2006-03-25 16:57:15.000000000 -0500
+++ shadow/77893.tmp.21398	2006-03-30 09:28:15.000000000 -0500
@@ -98,6 +98,20 @@
 Vanilla mono- built from sources.
 Arch: i386
 OS: Red Hat EL 4
 ------- Additional Comments From lupus at ximian.com  2006-03-24 12:29 -------
 Confirmed this fails on the 1.1.13 branch and works on HEAD.
+------- Additional Comments From massi at ximian.com  2006-03-30 09:28 -------
+This problem is related to the local regalloc.
+Somehow, the sequence:
+ (outarg iconst[24])
+ (stind.i local[6] (ldelema (ldind.ref arg[0]) (ldind.i4 arg[2])))
+ (outarg (ldobj (ldind.i local[6])))
+ (outarg (ldaddr local[4]))
+where the stind has been added by SSAPRE, produces correct code
+on head but wrong code on the 1.1.13 branch.
+I'm going to investigate more.

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