yann@1: See http://gcc.gnu.org/PR21173
yann@1: This is a fix for a last minute brown-bag bug with gcc-4.0.0
yann@1: 
yann@1:  ------- Additional Comment #24 From CVS Commits 2005-04-25 14:03 [reply] ------- 
yann@1: Subject: Bug 21173
yann@1: 
yann@1: CVSROOT:        /cvs/gcc
yann@1: Module name:    gcc
yann@1: Branch:         gcc-4_0-branch
yann@1: Changes by:     dberlin@gcc.gnu.org     2005-04-25 14:02:38
yann@1: 
yann@1: Modified files:
yann@1:         gcc            : ChangeLog tree-ssa-pre.c 
yann@1: 
yann@1: Log message:
yann@1:         2005-04-25  Daniel Berlin  <dberlin@dberlin.org>
yann@1:         
yann@1:         Fix PR tree-optimization/21173
yann@1:         
yann@1:         * tree-ssa-pre.c (create_expression_by_pieces): Call unshare_expr
yann@1:         on things we pass to force_gimple_operand.  Don't try to special
yann@1:         case min_invariants.
yann@1: 
yann@1: Patches:
yann@1: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=2.7592.2.192&r2=2.7592.2.193
yann@1: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-pre.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=2.65.4.2&r2=2.65.4.3
yann@1: 
yann@1: ===================================================================
yann@1: RCS file: /cvs/gcc/gcc/gcc/tree-ssa-pre.c,v
yann@1: retrieving revision 2.65.4.2
yann@1: retrieving revision 2.65.4.3
yann@1: diff -u -r2.65.4.2 -r2.65.4.3
yann@1: --- gcc/gcc/tree-ssa-pre.c	2005/04/17 23:40:31	2.65.4.2
yann@1: +++ gcc/gcc/tree-ssa-pre.c	2005/04/25 14:02:31	2.65.4.3
yann@1: @@ -1330,7 +1330,8 @@
yann@1:  	
yann@1:  	folded = fold (build (TREE_CODE (expr), TREE_TYPE (expr), 
yann@1:  			      genop1, genop2));
yann@1: -	newexpr = force_gimple_operand (folded, &forced_stmts, false, NULL);
yann@1: +	newexpr = force_gimple_operand (unshare_expr (folded), 
yann@1: +					&forced_stmts, false, NULL);
yann@1:  	if (forced_stmts)
yann@1:  	  {
yann@1:  	    tsi = tsi_start (forced_stmts);
yann@1: @@ -1372,14 +1373,8 @@
yann@1:  	add_referenced_tmp_var (temp);
yann@1:  	folded = fold (build (TREE_CODE (expr), TREE_TYPE (expr), 
yann@1:  			      genop1));
yann@1: -	/* If the generated operand  is already GIMPLE min_invariant
yann@1: -	   just use it instead of calling force_gimple_operand on it,
yann@1: -	   since that may make it not invariant by copying it into an
yann@1: -	   assignment.  */
yann@1: -	if (!is_gimple_min_invariant (genop1))
yann@1: -	  newexpr = force_gimple_operand (folded, &forced_stmts, false, NULL);
yann@1: -	else
yann@1: -	  newexpr = genop1;
yann@1: +	newexpr = force_gimple_operand (unshare_expr (folded), 
yann@1: +					&forced_stmts, false, NULL);
yann@1:  	if (forced_stmts)
yann@1:  	  {
yann@1:  	    tsi = tsi_start (forced_stmts);
yann@1: 
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yann@1: 
yann@1: 13:16:54 (1.24 MB/s) - `-' saved [1303]
yann@1: