Hi,

> From: gcc-patches-ow...@gcc.gnu.org [mailto:gcc-patches-
> ow...@gcc.gnu.org] On Behalf Of Thomas Preud'homme
> Sent: Tuesday, July 28, 2015 3:04 PM
> 
> > From: gcc-patches-ow...@gcc.gnu.org [mailto:gcc-patches-
> > ow...@gcc.gnu.org] On Behalf Of Thomas Preud'homme
> >
> > ChangeLog entry is as follows:
> >
> > 2015-07-28  Thomas Preud'homme  <thomas.preudho...@arm.com>
> >
> >         PR tree-optimization/66828
> >         * tree-ssa-math-opts.c (perform_symbolic_merge): Change type
> of
> > inc
> >         from int64_t to uint64_t.

Can I backport this change to GCC 5 branch? The patch applies cleanly on
GCC 5 and shows no regression on a native x86_64-linux-gnu bootstrapped
GCC and an arm-none-eabi GCC cross-compiler.

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ba37d96..a301c23 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,12 @@
+2015-08-04  Thomas Preud'homme  <thomas.preudho...@arm.com>
+
+       Backport from mainline
+       2015-07-28  Thomas Preud'homme  <thomas.preudho...@arm.com>
+
+       PR tree-optimization/66828
+       * tree-ssa-math-opts.c (perform_symbolic_merge): Change type of inc
+       from int64_t to uint64_t.
+
 2015-08-03  John David Anglin  <dang...@gcc.gnu.org>
 
        PR target/67060
diff --git a/gcc/tree-ssa-math-opts.c b/gcc/tree-ssa-math-opts.c
index c22a677..c699dcadb 100644
--- a/gcc/tree-ssa-math-opts.c
+++ b/gcc/tree-ssa-math-opts.c
@@ -1856,7 +1856,7 @@ perform_symbolic_merge (gimple source_stmt1, struct 
symbolic_number *n1,
      the same base (array, structure, ...).  */
   if (gimple_assign_rhs1 (source_stmt1) != gimple_assign_rhs1 (source_stmt2))
     {
-      int64_t inc;
+      uint64_t inc;
       HOST_WIDE_INT start_sub, end_sub, end1, end2, end;
       struct symbolic_number *toinc_n_ptr, *n_end;


Best regards,

Thomas


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