tree-optimization/114749 - reset partial vector decision for no-SLP retry

rguenth · rguenth · commit 704b15e277a8 · 2024-05-03T14:50:18.000+02:00
The following makes sure to reset LOOP_VINFO_USING_PARTIAL_VECTORS_P to its default of false when re-trying without SLP as otherwise analysis may run into bogus asserts. PR tree-optimization/114749 * tree-vect-loop.cc (vect_analyze_loop_2): Reset LOOP_VINFO_USING_PARTIAL_VECTORS_P when re-trying without SLP. (cherry picked from commit bf2b523)
diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc
@@ -2957,6 +2957,7 @@ vect_analyze_loop_2 (loop_vec_info loop_vinfo, bool &fatal,
   LOOP_VINFO_VERSIONING_THRESHOLD (loop_vinfo) = 0;
   LOOP_VINFO_CAN_USE_PARTIAL_VECTORS_P (loop_vinfo)
     = saved_can_use_partial_vectors_p;
+  LOOP_VINFO_USING_PARTIAL_VECTORS_P (loop_vinfo) = false;
 
   goto start_over;
 }

Original file line number	Diff line number	Diff line change
`@@ -2957,6 +2957,7 @@ vect_analyze_loop_2 (loop_vec_info loop_vinfo, bool &fatal,`
`2957`	`2957`	`LOOP_VINFO_VERSIONING_THRESHOLD (loop_vinfo) = 0;`
`2958`	`2958`	`LOOP_VINFO_CAN_USE_PARTIAL_VECTORS_P (loop_vinfo)`
`2959`	`2959`	`= saved_can_use_partial_vectors_p;`
	`2960`	`+ LOOP_VINFO_USING_PARTIAL_VECTORS_P (loop_vinfo) = false;`
`2960`	`2961`
`2961`	`2962`	`goto start_over;`
`2962`	`2963`	`}`