https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88593
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-12-25
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
This patch:
diff --git a/gcc/mode-switching.c b/gcc/mode-switching.c
index 589fbeb0742..7c82d7a4b6f 100644
--- a/gcc/mode-switching.c
+++ b/gcc/mode-switching.c
@@ -509,6 +509,10 @@ optimize_mode_switching (void)
basic_block pre_exit = 0;
struct edge_list *edge_list = 0;
+ /* Mode switching doesn't use dominane info but can invalidate it in
+ different ways. For simplicity, free dominance info here. */
+ free_dominance_info (CDI_DOMINATORS);
+
/* These bitmaps are used for the LCM algorithm. */
sbitmap *kill, *del, *insert, *antic, *transp, *comp;
sbitmap *avin, *avout;
fixes ICE.
