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First in tree-ssa-live.c, "ann" is set, but never used in a couple places.
Second, in tree-ssa-copy.c we set "stmt" in
propagate_tree_value_into_stmt, but never use it. Removing the
assignment is obviously trivial.
Finally, in cfglayout force_nonfallthru may delete its argument (E_FALL)
which we then use. The fix is to save E_FALL->src prior to the call to
force_nonfallthru.
Bootstrapped and regression tested on x86_64-unknown-linux-gnu. OK for
trunk?
Thanks,
Jeff
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* tree-ssa-live.c (remove_unused_scope_block_p): Remove set but
unused variable "ann".
(remove_unused_locals): Likewise.
* tree-ssa-copy.c (propagate_tree_value_into_stmt): Remove useless
statement.
* cfglayout.c (fixup_reorder_chain): Do not dereference E_FALL
after it is freed.
Index: tree-ssa-live.c
===
*** tree-ssa-live.c (revision 171351)
--- tree-ssa-live.c (working copy)
*** remove_unused_scope_block_p (tree scope)
*** 427,433
{
tree *t, *next;
bool unused = !TREE_USED (scope);
- var_ann_t ann;
int nsubblocks = 0;
for (t = &BLOCK_VARS (scope); *t; t = next)
--- 427,432
*** remove_unused_scope_block_p (tree scope)
*** 467,474
info about optimized-out variables in the scope blocks.
Exception are the scope blocks not containing any instructions
at all so user can't get into the scopes at first place. */
! else if ((ann = var_ann (*t)) != NULL
! && is_used_p (*t))
unused = false;
else if (TREE_CODE (*t) == LABEL_DECL && TREE_USED (*t))
/* For labels that are still used in the IL, the decision to
--- 466,472
info about optimized-out variables in the scope blocks.
Exception are the scope blocks not containing any instructions
at all so user can't get into the scopes at first place. */
! else if (var_ann (*t) != NULL && is_used_p (*t))
unused = false;
else if (TREE_CODE (*t) == LABEL_DECL && TREE_USED (*t))
/* For labels that are still used in the IL, the decision to
*** remove_unused_locals (void)
*** 690,696
basic_block bb;
tree var, t;
referenced_var_iterator rvi;
- var_ann_t ann;
bitmap global_unused_vars = NULL;
unsigned srcidx, dstidx, num;
--- 688,693
*** remove_unused_locals (void)
*** 766,772
{
var = VEC_index (tree, cfun->local_decls, srcidx);
if (TREE_CODE (var) != FUNCTION_DECL
! && (!(ann = var_ann (var))
|| !is_used_p (var)))
{
if (is_global_var (var))
--- 763,769
{
var = VEC_index (tree, cfun->local_decls, srcidx);
if (TREE_CODE (var) != FUNCTION_DECL
! && (!var_ann (var)
|| !is_used_p (var)))
{
if (is_global_var (var))
*** remove_unused_locals (void)
*** 798,804
FOR_EACH_LOCAL_DECL (cfun, ix, var)
if (TREE_CODE (var) == VAR_DECL
&& is_global_var (var)
! && (ann = var_ann (var)) != NULL
&& is_used_p (var))
mark_all_vars_used (&DECL_INITIAL (var), global_unused_vars);
--- 795,801
FOR_EACH_LOCAL_DECL (cfun, ix, var)
if (TREE_CODE (var) == VAR_DECL
&& is_global_var (var)
! && var_ann (var) != NULL
&& is_used_p (var))
mark_all_vars_used (&DECL_INITIAL (var), global_unused_vars);
Index: tree-ssa-copy.c
===
*** tree-ssa-copy.c (revision 171351)
--- tree-ssa-copy.c (working copy)
*** propagate_tree_value_into_stmt (gimple_s
*** 244,250
expr = gimple_assign_rhs1 (stmt);
propagate_tree_value (&expr, val);
gimple_assign_set_rhs_from_tree (gsi, expr);
- stmt = gsi_stmt (*gsi);
}
else if (gimple_code (stmt) == GIMPLE_COND)
{
--- 244,249
Index: cfglayout.c
===
*** cfglayout.c (revision 171351)
--- cfglayout.c (working copy)
*** fixup_reorder_chain (void)
*** 766,772
{
edge e_fall, e_taken, e;
rtx bb_end_insn;
! basic_block nb;
edge_iterato
