tree-optimization/94266 - aovid propagating addresses of TARGET_MEM_REFs

2020-03-23  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/94266
	* tree-ssa-forwprop.c (pass_forwprop::execute): Do not propagate
	addresses of TARGET_MEM_REFs.
 Please enter the commit message for your changes. Lines starting

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 6ba8294..5df915d 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2020-03-23  Richard Biener  <rguenther@suse.de>
+
+       PR tree-optimization/94266
+       * tree-ssa-forwprop.c (pass_forwprop::execute): Do not propagate
+       addresses of TARGET_MEM_REFs.
+
 2020-03-23  Martin Liska  <mliska@suse.cz>
 
        PR ipa/94250

diff --git a/gcc/tree-ssa-forwprop.c b/gcc/tree-ssa-forwprop.c
index 61b4eec..234c1f7 100644 (file)
--- a/gcc/tree-ssa-forwprop.c
+++ b/gcc/tree-ssa-forwprop.c
@@ -2712,6 +2712,7 @@ pass_forwprop::execute (function *fun)
              if ((!base
                   || !DECL_P (base)
                   || decl_address_invariant_p (base))
+                 && TREE_CODE (base) != TARGET_MEM_REF
                  && !stmt_references_abnormal_ssa_name (stmt)
                  && forward_propagate_addr_expr (lhs, rhs, true))
                {