From 5b900a4c0ee38a66b04b4ceeecb8b194ddde7e57 Mon Sep 17 00:00:00 2001 From: Dorit Nuzman Date: Thu, 12 Jul 2007 14:42:08 +0000 Subject: re PR target/25413 (wrong alignment or incorrect address computation in vectorized code on Pentium 4 SSE) 2007-07-12 Dorit Nuzman Devang Patel PR tree-optimization/25413 * targhooks.c (default_builtin_vector_alignment_reachable): New. * targhooks.h (default_builtin_vector_alignment_reachable): New. * tree.h (contains_packed_reference): New. * expr.c (contains_packed_reference): New. * tree-vect-analyze.c (vector_alignment_reachable_p): New. (vect_enhance_data_refs_alignment): Call vector_alignment_reachable_p. * target.h (vector_alignment_reachable): New builtin. * target-def.h (TARGET_VECTOR_ALIGNMENT_REACHABLE): New. * config/rs6000/rs6000.c (rs6000_vector_alignment_reachable): New. (TARGET_VECTOR_ALIGNMENT_REACHABLE): Define. Co-Authored-By: Devang Patel From-SVN: r126591 --- gcc/targhooks.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'gcc/targhooks.c') diff --git a/gcc/targhooks.c b/gcc/targhooks.c index b063e72..f875b87 100644 --- a/gcc/targhooks.c +++ b/gcc/targhooks.c @@ -653,4 +653,20 @@ tree default_mangle_decl_assembler_name (tree decl ATTRIBUTE_UNUSED, return id; } +bool +default_builtin_vector_alignment_reachable (tree type, bool is_packed) +{ + if (is_packed) + return false; + + /* Assuming that types whose size is > pointer-size are not guaranteed to be + naturally aligned. */ + if (tree_int_cst_compare (TYPE_SIZE (type), bitsize_int (POINTER_SIZE)) > 0) + return false; + + /* Assuming that types whose size is <= pointer-size + are naturally aligned. */ + return true; +} + #include "gt-targhooks.h" -- cgit v1.1