From mboxrd@z Thu Jan 1 00:00:00 1970 From: bh@techhouse.org To: gcc-gnats@gcc.gnu.org Subject: optimization/4231: a gcc-3.0.1 optimization bug Date: Tue, 04 Sep 2001 16:36:00 -0000 Message-id: <20010904233058.25717.qmail@sourceware.cygnus.com> X-SW-Source: 2001-09/msg00096.html List-Id: >Number: 4231 >Category: optimization >Synopsis: a gcc-3.0.1 optimization bug >Confidential: no >Severity: serious >Priority: medium >Responsible: unassigned >State: open >Class: sw-bug >Submitter-Id: net >Arrival-Date: Tue Sep 04 16:36:01 PDT 2001 >Closed-Date: >Last-Modified: >Originator: Benoit Hudson >Release: 3.0.1 >Organization: >Environment: i386-glibc21-linux (redhat 7.2) >Description: gcc-3.0.1 seems to optimize out createmap.cpp:418 (grade==maxgrade) in some circumstances. The correct program should print out an "is ok" line every time it prints out an "is best" line. The incorrect program aborts. This works on sparc-sun-solaris28 / 2.95.2 , i386-glibc21-linux / 2.96(redhat), i386-glibc21-linux / 3.0.1 up to -O1 It fails on i386-glibc21-linux / 3.0.1 with -O2 and above. >How-To-Repeat: gcc-3.0.1 -O2 createmap.ii -o createmap createmap 10 10 10 > file less file # warning: when it works, file contains binary data >Fix: >Release-Note: >Audit-Trail: >Unformatted: ----gnatsweb-attachment---- Content-Type: application/octet-stream; name="createmap.ii" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="createmap.ii" IyAzICJjcmVhdGVtYXAuY3BwIgojIDEgIi91c3IvbG9jYWwvbGliL2djYy1saWIvaTY4Ni1wYy1s aW51eC1nbnUvMy4wLjEvaW5jbHVkZS9zdGRpby5oIiAxIDMKIyAzNiAiL3Vzci9sb2NhbC9saWIv Z2NjLWxpYi9pNjg2LXBjLWxpbnV4LWdudS8zLjAuMS9pbmNsdWRlL3N0ZGlvLmgiIDMKIyAxICIv dXNyL2luY2x1ZGUvZmVhdHVyZXMuaCIgMSAzCiMgMjgzICIvdXNyL2luY2x1ZGUvZmVhdHVyZXMu aCIgMwojIDEgIi91c3IvaW5jbHVkZS9zeXMvY2RlZnMuaCIgMSAzCiMgMjg0ICIvdXNyL2luY2x1 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