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See http://gcc.gnu.org/PR21173
This is a fix for a last minute brown-bag bug with gcc-4.0.0
------- Additional Comment #24 From CVS Commits 2005-04-25 14:03 [reply] -------
Subject: Bug 21173
CVSROOT: /cvs/gcc
Module name: gcc
Branch: gcc-4_0-branch
Changes by: dberlin@gcc.gnu.org 2005-04-25 14:02:38
Modified files:
gcc : ChangeLog tree-ssa-pre.c
Log message:
2005-04-25 Daniel Berlin <dberlin@dberlin.org>
Fix PR tree-optimization/21173
* tree-ssa-pre.c (create_expression_by_pieces): Call unshare_expr
on things we pass to force_gimple_operand. Don't try to special
case min_invariants.
Patches:
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
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
===================================================================
RCS file: /cvs/gcc/gcc/gcc/tree-ssa-pre.c,v
retrieving revision 2.65.4.2
retrieving revision 2.65.4.3
diff -u -r2.65.4.2 -r2.65.4.3
--- gcc/gcc/tree-ssa-pre.c 2005/04/17 23:40:31 2.65.4.2
+++ gcc/gcc/tree-ssa-pre.c 2005/04/25 14:02:31 2.65.4.3
@@ -1330,7 +1330,8 @@
folded = fold (build (TREE_CODE (expr), TREE_TYPE (expr),
genop1, genop2));
- newexpr = force_gimple_operand (folded, &forced_stmts, false, NULL);
+ newexpr = force_gimple_operand (unshare_expr (folded),
+ &forced_stmts, false, NULL);
if (forced_stmts)
{
tsi = tsi_start (forced_stmts);
@@ -1372,14 +1373,8 @@
add_referenced_tmp_var (temp);
folded = fold (build (TREE_CODE (expr), TREE_TYPE (expr),
genop1));
- /* If the generated operand is already GIMPLE min_invariant
- just use it instead of calling force_gimple_operand on it,
- since that may make it not invariant by copying it into an
- assignment. */
- if (!is_gimple_min_invariant (genop1))
- newexpr = force_gimple_operand (folded, &forced_stmts, false, NULL);
- else
- newexpr = genop1;
+ newexpr = force_gimple_operand (unshare_expr (folded),
+ &forced_stmts, false, NULL);
if (forced_stmts)
{
tsi = tsi_start (forced_stmts);
0K . 1.24 MB/s
13:16:54 (1.24 MB/s) - `-' saved [1303]
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