From mboxrd@z Thu Jan 1 00:00:00 1970 From: wilhelm.nuesser@sap.com To: gcc-gnats@gcc.gnu.org Cc: thomas.hiller@compaq.com Subject: optimization/4186: core dump in -O2 on ia32 with attached code (regression to 2.95.*) Date: Fri, 31 Aug 2001 07:36:00 -0000 Message-id: <20010831143011.9206.qmail@sourceware.cygnus.com> X-SW-Source: 2001-08/msg00743.html List-Id: >Number: 4186 >Category: optimization >Synopsis: core dump in -O2 on ia32 with attached code (regression to 2.95.*) >Confidential: no >Severity: critical >Priority: high >Responsible: unassigned >State: open >Class: sw-bug >Submitter-Id: net >Arrival-Date: Fri Aug 31 07:36:00 PDT 2001 >Closed-Date: >Last-Modified: >Originator: wilhelm.nuesser@sap.com >Release: gcc version 3.0.1 >Organization: >Environment: Linux ia32, glibc 2.1, SuSE 7.0, RH 6.* ... gcc -v gives: Reading specs from /opt/gcc301/lib/gcc-lib/i686-pc-linux-gnu/3.0.1/specs Configured with: ../gcc/gcc-3.0.1/configure --prefix=/opt/gcc301 --enable-shared Thread model: single gcc version 3.0.1 >Description: Attached code gives core dumps when compiling with -O2. Running -O1 works. Changing the struct s1 (removing an unused short) also works. Changing third parameter of memcpy to int constant also works. >How-To-Repeat: Compile attached code with -O2 >Fix: >Release-Note: >Audit-Trail: >Unformatted: ----gnatsweb-attachment---- Content-Type: application/octet-stream; name="testc.c" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="testc.c" I2luY2x1ZGUgPHN0cmluZy5oPgoKCnR5cGVkZWYgc3RydWN0IHMxIAp7CiAgICB1bnNpZ25lZCBj aGFyICAqIGVudHJ5X3A7ICAgICAKICAgIHNob3J0ICAgICAgICAgICAgZW50cnlfbnI7ICAgIAog ICAgc2hvcnQgICAgICAgICAgICBlbnRyeWxnOyAgCiAgICBzaG9ydCAgICAgICAgICAgIGxsZW47 ICAgICAKfQpzMTsKCgpzdGF0aWMgdm9pZCBmMSAodm9pZCAqIHRhYmRpciwgdW5zaWduZWQgY2hh ciAqIGNvbnN0IGtleXMsCgkJCQkgIGNvbnN0IHMxICBlbnRyeV9sb2MpCnsKICBpbnQga2V5bGcg PSAxMTsKCiAgKHZvaWQpIG1lbWNweShrZXlzLCBlbnRyeV9sb2MuZW50cnlfcCwga2V5bGcpOwp9 CgoKaW50IG1haW4oKQp7CiAgdm9pZCAgICAgICAgICAgICAgICAgICogdGFiZGlyOwogIHVuc2ln bmVkIGNoYXIgICAgICAgICAqIGtleXM7CiAgczEgICAgICAgICAgICAgICAgICAgICAgZW50cnlf bG9jOwoKICAvKiBidWlsZCB1cCAqLwogIGtleXMgPSAodW5zaWduZWQgY2hhciopIG1hbGxvYygx MSk7CiAKICBlbnRyeV9sb2MuZW50cnlfcCA9ICh1bnNpZ25lZCBjaGFyICopIG1hbGxvYygxMSk7 CiAgbWVtc2V0KGVudHJ5X2xvYy5lbnRyeV9wLCAnQScsIDExKTsKCiAgZjEodGFiZGlyLCBrZXlz LCBlbnRyeV9sb2MpOyAKICAKICByZXR1cm4gKDApOwp9Cg==