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[bootstrap-O1] add initializers to avoid warnings at -O1 

Building with the bootstrap-O1 configuration option fails to compile a
number of files due to AFAICT false-positive warnings about uses of
uninitialized variables.

This patch adds dummy initializers to silence them all.

for  gcc/ChangeLog

	* multiple_target.c (create_dispatcher_calls): Init e_next.
	* tree-ssa-loop-split.c (split_loop): Init border.
	* tree-vect-loop.c (vect_determine_vectorization_factor): Init
	scalar_type.

From-SVN: r244086
This commit is contained in:
Alexandre Oliva 2017-01-05 01:45:51 +00:00 committed by Alexandre Oliva
parent 08edc32002
commit d61d5fcd7f
4 changed files with 10 additions and 3 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2017-01-04 Alexandre Oliva <aoliva@redhat.com>
* multiple_target.c (create_dispatcher_calls): Init e_next.
* tree-ssa-loop-split.c (split_loop): Init border.
* tree-vect-loop.c (vect_determine_vectorization_factor): Init
scalar_type.
2017-01-04 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/71977

2
gcc/multiple_target.c
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@ -42,7 +42,7 @@ static void
create_dispatcher_calls (struct cgraph_node *node)
{
cgraph_edge *e;
cgraph_edge *e_next;
cgraph_edge *e_next = NULL;
/* We need to remember NEXT_CALLER as it could be modified in the loop. */
for (e = node->callers; e ;e = (e == NULL) ? e_next : e->next_caller)

2
gcc/tree-ssa-loop-split.c
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@ -497,7 +497,7 @@ split_loop (struct loop *loop1, struct tree_niter_desc *niter)
unsigned i;
bool changed = false;
tree guard_iv;
tree border;
tree border = NULL_TREE;
affine_iv iv;
bbs = get_loop_body (loop1);

2
gcc/tree-vect-loop.c
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@ -183,7 +183,7 @@ vect_determine_vectorization_factor (loop_vec_info loop_vinfo)
basic_block *bbs = LOOP_VINFO_BBS (loop_vinfo);
unsigned nbbs = loop->num_nodes;
unsigned int vectorization_factor = 0;
tree scalar_type;
tree scalar_type = NULL_TREE;
gphi *phi;
tree vectype;
unsigned int nunits;