re PR target/92758 (r278833 breaks gcc.target/powerpc/fold-vec-splat-floatdouble.c)

2019-12-03  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/92758
	* tree-ssa-forwprop.c (simplify_vector_constructor): Restore
	operation on uniform vectors.

From-SVN: r278938

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e9119f9..9efc808 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,11 @@
 2019-12-03  Richard Biener  <rguenther@suse.de>
 
+       PR tree-optimization/92758
+       * tree-ssa-forwprop.c (simplify_vector_constructor): Restore
+       operation on uniform vectors.
+
+2019-12-03  Richard Biener  <rguenther@suse.de>
+
        PR tree-optimization/92645
        * gimple-fold.c (gimple_fold_builtin_memory_op): Fold memcpy
        from or to a properly aligned register variable.

diff --git a/gcc/tree-ssa-forwprop.c b/gcc/tree-ssa-forwprop.c
index 36e6267..4a83124 100644 (file)
--- a/gcc/tree-ssa-forwprop.c
+++ b/gcc/tree-ssa-forwprop.c
@@ -2043,8 +2043,7 @@ simplify_vector_constructor (gimple_stmt_iterator *gsi)
   gcc_checking_assert (TREE_CODE (op) == CONSTRUCTOR
                       && TREE_CODE (type) == VECTOR_TYPE);
 
-  if (!TYPE_VECTOR_SUBPARTS (type).is_constant (&nelts)
-      || uniform_vector_p (op))
+  if (!TYPE_VECTOR_SUBPARTS (type).is_constant (&nelts))
     return false;
   elem_type = TREE_TYPE (type);
   elem_size = TREE_INT_CST_LOW (TYPE_SIZE (elem_type));