Bug 36346 - call clobbering computation uses TBAA-pruned points-to-sets
Summary: call clobbering computation uses TBAA-pruned points-to-sets
Status: RESOLVED FIXED
Alias: None
Product: gcc
Classification: Unclassified
Component: tree-optimization (show other bugs)
Version: 4.4.0
: P3 normal
Target Milestone: 4.4.0
Assignee: Richard Biener
URL:
Keywords: alias, wrong-code
Depends on:
Blocks: 36343 36347
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Reported: 2008-05-27 13:18 UTC by Richard Biener
Modified: 2008-05-29 10:33 UTC (History)
2 users (show)

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Target:
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Known to work:
Known to fail:
Last reconfirmed: 2008-05-27 14:47:53

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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.