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[Bug middle-end/60546] New: [4.8 and 4.9] O2 & asan enable generates wrong insns
- From: "manjian2006 at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 17 Mar 2014 05:38:23 +0000
- Subject: [Bug middle-end/60546] New: [4.8 and 4.9] O2 & asan enable generates wrong insns
- Auto-submitted: auto-generated
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60546
Bug ID: 60546
Summary: [4.8 and 4.9] O2 & asan enable generates wrong insns
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: manjian2006 at gmail dot com
Created attachment 32366
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32366&action=edit
source that causes bug
My attachment gives a testcase to this bug.
To compile,modify the first argument of 1.sh to the path of your GCC (>=
4.8.1).
Then run 1.sh to compile.
As you can see the differences between line #1 and #2 is just -O2 or -Os.
And ./1 reports an error,but ./2 don't.
So I am sure currently asan with -O2 will generates wrong insn in middle end.I
have not located where goes wrong, please help.