re PR tree-optimization/78646 (incorrect result type for pointer addition in slsr)

2016-12-05  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
	    Stefan Freudenberger  <stefan@reservoir.com>

	PR tree-optimization/78646
	* gimple-ssa-strength-reduction.c (replace_ref): The pointer
	addition used for the memory base expression should have the type
	of the candidate.

Co-Authored-By: Stefan Freudenberger <stefan@reservoir.com>
From-SVN: r243272

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 57c2450..beef921 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2016-12-05  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
+           Stefan Freudenberger  <stefan@reservoir.com>
+
+       PR tree-optimization/78646
+       * gimple-ssa-strength-reduction.c (replace_ref): The pointer
+       addition used for the memory base expression should have the type
+       of the candidate.
+
 2016-12-05  Waldemar Brodkorb  <wbx@openadk.org>
 
        PR target/71721

diff --git a/gcc/gimple-ssa-strength-reduction.c b/gcc/gimple-ssa-strength-reduction.c
index bdfdb9a..21dcbb0 100644 (file)
--- a/gcc/gimple-ssa-strength-reduction.c
+++ b/gcc/gimple-ssa-strength-reduction.c
@@ -1921,7 +1921,7 @@ replace_ref (tree *expr, slsr_cand_t c)
   if (align < TYPE_ALIGN (acc_type))
     acc_type = build_aligned_type (acc_type, align);
 
-  add_expr = fold_build2 (POINTER_PLUS_EXPR, TREE_TYPE (c->base_expr),
+  add_expr = fold_build2 (POINTER_PLUS_EXPR, c->cand_type,
                          c->base_expr, c->stride);
   mem_ref = fold_build2 (MEM_REF, acc_type, add_expr,
                         wide_int_to_tree (c->cand_type, c->index));