re PR tree-optimization/18009 (ICE in vect_transform_stmt, at…

re PR tree-optimization/18009 (ICE in vect_transform_stmt, at tree-vectorizer.c:2625 (testcase included))

        PR tree-optimization/18009
        * tree-vectorizer.h (enum dr_alignment_support): New type.
        (MAX_NUMBER_OF_UNALIGNED_DATA_REFS): Removed.
        (LOOP_UNALIGNED_DR): replaced with LOOP_VINFO_UNALIGNED_DR and holds a
        single data_reference (instead of a varray of references).
        * tree-vectorizer.c (new_loop_vec_info): Likewise.
        (vect_gen_niters_for_prolog_loop): Likewise.
        (vect_update_inits_of_drs): Likewise.

        (vect_update_inits_of_drs): Setting of DR_MISALIGNMENT moved to
        vect_enhance_data_refs_alignment.
        (vect_do_peeling_for_alignment): Likewise.
        (vect_enhance_data_refs_alignment): Decide if and by how much to peel;
        this functionality used to be in vect_analyze_data_refs_alignment.
        Also update DR_MISALIGNMENT due to peeling; this functionality used to
        be in vect_update_inits_of_drs and vect_do_peeling_for_alignment).
        (vect_analyze_data_refs_alignment): Decision on whether and by how much
        to peel moved to vect_enhance_data_refs_alignment. Call
        vect_supportable_dr_alignment.

        (vect_compute_data_ref_alignment): Set STMT_VINFO_VECTYPE.
        (vect_compute_data_refs_alignment): Return bool. Consider return value
        of vect_compute_data_ref_alignment and return true/false accordingly.
        (vect_enhance_data_refs_alignment): Consider return value of
        vect_compute_data_refs_alignment and return true/false accordingly.

        (vect_supportable_dr_alignment): New function.
        (vectorizable_store): Call vect_supportable_dr_alignment.
        (vectorizable_load): Call vect_supportable_dr_alignment. Alignment
        support checks moved from here to vect_supportable_dr_alignment.

        (vect_transform_loop): Avoid 80 columns overflow.

From-SVN: r90051

gcc/ChangeLog

+2004-11-03  Dorit Naishlos  <dorit@il.ibm.com>
+
+	PR tree-optimization/18009
+	* tree-vectorizer.h (enum dr_alignment_support): New type.
+	(MAX_NUMBER_OF_UNALIGNED_DATA_REFS): Removed.
+	(LOOP_UNALIGNED_DR): replaced with LOOP_VINFO_UNALIGNED_DR and holds a
+	single data_reference (instead of a varray of references).
+	* tree-vectorizer.c (new_loop_vec_info): Likewise.
+	(vect_gen_niters_for_prolog_loop): Likewise.
+	(vect_update_inits_of_drs): Likewise.
+
+	(vect_update_inits_of_drs): Setting of DR_MISALIGNMENT moved to
+	vect_enhance_data_refs_alignment.
+	(vect_do_peeling_for_alignment): Likewise.
+	(vect_enhance_data_refs_alignment): Decide if and by how much to peel;
+	this functionality used to be in vect_analyze_data_refs_alignment.
+	Also update DR_MISALIGNMENT due to peeling; this functionality used to
+	be in vect_update_inits_of_drs and vect_do_peeling_for_alignment).
+	(vect_analyze_data_refs_alignment): Decision on whether and by how much
+	to peel moved to vect_enhance_data_refs_alignment. Call 
+	vect_supportable_dr_alignment.
+
+	(vect_compute_data_ref_alignment): Set STMT_VINFO_VECTYPE.
+	(vect_compute_data_refs_alignment): Return bool. Consider return value
+	of vect_compute_data_ref_alignment and return true/false accordingly.
+	(vect_enhance_data_refs_alignment): Consider return value of 
+	vect_compute_data_refs_alignment and return true/false accordingly.
+
+	(vect_supportable_dr_alignment): New function.
+	(vectorizable_store): Call vect_supportable_dr_alignment.
+	(vectorizable_load): Call vect_supportable_dr_alignment. Alignment
+	support checks moved from here to vect_supportable_dr_alignment.
+
+	(vect_transform_loop): Avoid 80 columns overflow.
+
 2004-11-03  Andrew Pinski  <pinskia@physics.uc.edu>
 
 	* timevar.c (timevar_enable): Change from

gcc/tree-vectorizer.h

@@ -34,6 +34,14 @@ enum operation_type {
   binary_op
 };
 
+/* Define type of available alignment support.  */
+enum dr_alignment_support {
+  dr_unaligned_unsupported,
+  dr_unaligned_supported,
+  dr_unaligned_software_pipeline,
+  dr_aligned
+};
+
 /*-----------------------------------------------------------------*/
 /* Info on vectorized defs.                                        */
 /*-----------------------------------------------------------------*/
@@ -121,7 +129,6 @@ vinfo_for_stmt (tree stmt)
 
 /* The misalignment of the memory access in bytes.  */
 #define DR_MISALIGNMENT(DR)   (DR)->aux
-#define MAX_NUMBER_OF_UNALIGNED_DATA_REFS 1
 
 static inline bool
 aligned_access_p (struct data_reference *data_ref_info)
@@ -163,7 +170,7 @@ typedef struct _loop_vec_info {
   int vectorization_factor;
 
   /* Unknown DRs according to which loop was peeled.  */
-  struct data_reference *unaligned_drs [MAX_NUMBER_OF_UNALIGNED_DATA_REFS];
+  struct data_reference *unaligned_dr;
 
   /* If true, loop is peeled.
    unaligned_drs show in this case DRs used for peeling.  */
@@ -187,7 +194,7 @@ typedef struct _loop_vec_info {
 #define LOOP_VINFO_DATAREF_READS(L)  (L)->data_ref_reads
 #define LOOP_VINFO_INT_NITERS(L) (TREE_INT_CST_LOW ((L)->num_iters))       
 #define LOOP_DO_PEELING_FOR_ALIGNMENT(L) (L)->do_peeling_for_alignment
-#define LOOP_UNALIGNED_DR(L, I)      (L)->unaligned_drs[(I)] 
+#define LOOP_VINFO_UNALIGNED_DR(L)       (L)->unaligned_dr
   
 
 #define LOOP_VINFO_NITERS_KNOWN_P(L)                     \