Bug 36346

Summary: call clobbering computation uses TBAA-pruned points-to-sets
Product: gcc Reporter: Richard Biener <rguenth>
Component: tree-optimizationAssignee: Richard Biener <rguenth>
Status: RESOLVED FIXED    
Severity: normal CC: gcc-bugs, pinskia
Priority: P3 Keywords: alias, wrong-code
Version: 4.4.0   
Target Milestone: 4.4.0   
Host: Target:
Build: Known to work:
Known to fail: Last reconfirmed: 2008-05-27 14:47:53
Bug Depends on:    
Bug Blocks: 36343, 36347    

Description Richard Biener 2008-05-27 13:18:05 UTC
See also PR36343 which fixes the issue by not pruning points-to-sets at all.
Comment 1 Richard Biener 2008-05-27 14:47:53 UTC
I have a patch.
Comment 2 Richard Biener 2008-05-29 10:32:48 UTC
Subject: Bug 36346

Author: rguenth
Date: Thu May 29 10:31:58 2008
New Revision: 136152

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=136152
Log:
2008-05-29  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/36343
	PR tree-optimization/36346
	PR tree-optimization/36347
	* tree-flow.h (clobber_what_p_points_to): Declare.
	* tree-ssa-structalias.c (set_uids_in_ptset): Whether the
	pointed-to variable is dereferenced is irrelevant to whether
	the pointer can access the pointed-to variable.
	(clobber_what_p_points_to): New function.
	* tree-ssa-alias.c (set_initial_properties): Use it.
	* tree-ssa.c (verify_flow_sensitive_alias_info): Adjust
	call clobber check for NMTs.

	* gcc.c-torture/execute/pr36343.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr36343.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-flow.h
    trunk/gcc/tree-ssa-alias.c
    trunk/gcc/tree-ssa-structalias.c
    trunk/gcc/tree-ssa.c

Comment 3 Richard Biener 2008-05-29 10:33:22 UTC
Fixed.