From: Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org>
Date: Tue, 19 Jul 2022 12:13:26 +0000 (+0530)
Subject: forwprop: Use lhs type instead of arg0 in folding VEC_PERM_EXPR.
X-Git-Tag: basepoints/gcc-14~5462
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4c3231302577445417715a7c22e879e4159376d3;p=thirdparty%2Fgcc.git

forwprop: Use lhs type instead of arg0 in folding VEC_PERM_EXPR.

gcc/ChangeLog:

	* tree-ssa-forwprop.cc (simplify_permutation): Use lhs type
	instead of TREE_TYPE (arg0) as result type in folding VEC_PERM_EXPR.
---

diff --git a/gcc/tree-ssa-forwprop.cc b/gcc/tree-ssa-forwprop.cc
index fdc4bc8909d..d04cf4bccf8 100644
--- a/gcc/tree-ssa-forwprop.cc
+++ b/gcc/tree-ssa-forwprop.cc
@@ -2661,7 +2661,7 @@ simplify_permutation (gimple_stmt_iterator *gsi)
 
       /* Shuffle of a constructor.  */
       bool ret = false;
-      tree res_type = TREE_TYPE (arg0);
+      tree res_type = TREE_TYPE (gimple_assign_lhs (stmt));
       tree opt = fold_ternary (VEC_PERM_EXPR, res_type, arg0, arg1, op2);
       if (!opt
 	  || (TREE_CODE (opt) != CONSTRUCTOR && TREE_CODE (opt) != VECTOR_CST))