From mboxrd@z Thu Jan 1 00:00:00 1970 From: dje@watson.ibm.com To: gcc-gnats@gcc.gnu.org Subject: optimization/2076: scheduler ignores data dependency Date: Sun, 01 Apr 2001 00:00:00 -0000 Message-id: <20010223223619.3471.qmail@sourceware.cygnus.com> X-SW-Source: 2001-q1/msg01647.html List-Id: >Number: 2076 >Category: optimization >Synopsis: scheduler ignores data dependency >Confidential: no >Severity: serious >Priority: high >Responsible: unassigned >State: open >Class: sw-bug >Submitter-Id: net >Arrival-Date: Fri Feb 23 14:46:00 PST 2001 >Closed-Date: >Last-Modified: >Originator: dje@watson.ibm.com >Release: gcc-3.0 20010222 (prerelease) >Organization: >Environment: rs6000-ibm-aix4.3.3.0 >Description: c-torture/execute/980205.c demonstrates a bug where the first scheduler pass moves a load of a parameter from the stack argument area before the parameter has been spilled to the argument area. Compiler pass 980205.c.16.regmove shows the arguments spilled to the argument area before FP pseudo is loaded. After the scheduling pass, the load from the pseudo has been moved to the beginning of the basic block before the argument area on the stack is valid. >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted: