[PATCH] Fix uninitialised variable warning in tree-ssa-loop-ivcanon.c

[Kyrill Tkachov]

Hi all,

While looking at the build logs I noticed a warning while building 
tree-ssa-loop-ivcanon.c about a potential use of an uninitialised variable.
This patchlet fixes that warning by initialising it to 0.

Tested arm-none-eabi.

Ok for trunk?

2014-04-17  Kyrylo Tkachov  <kyrylo.tkac...@arm.com>

        * tree-ssa-loop-ivcanon.c (canonicalize_loop_induction_variables):
        Initialise n_unroll to 0.

diff --git a/gcc/tree-ssa-loop-ivcanon.c b/gcc/tree-ssa-loop-ivcanon.c
index cdf1559..7a83b12 100644
--- a/gcc/tree-ssa-loop-ivcanon.c
+++ b/gcc/tree-ssa-loop-ivcanon.c
@@ -656,7 +656,7 @@ try_unroll_loop_completely (struct loop *loop,
 			    HOST_WIDE_INT maxiter,
 			    location_t locus)
 {
-  unsigned HOST_WIDE_INT n_unroll, ninsns, max_unroll, unr_insns;
+  unsigned HOST_WIDE_INT n_unroll = 0, ninsns, max_unroll, unr_insns;
   gimple cond;
   struct loop_size size;
   bool n_unroll_found = false;