diff mbox series

[3/5] volatile stores are never dead

Message ID 20210410223044.86100-4-luc.vanoostenryck@gmail.com (mailing list archive)
State Mainlined, archived
Headers show
Series kill more dead stores | expand

Commit Message

Luc Van Oostenryck April 10, 2021, 10:30 p.m. UTC 
so they shouldn't be killed.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
---
 memops.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/memops.c b/memops.c
index 31fd2d3eaffc..8020f2e6cf03 100644
--- a/memops.c
+++ b/memops.c
@@ -215,6 +215,8 @@  static bool try_to_kill_store(pseudo_t pseudo, struct instruction *insn,
 			return false;
 		if (dom->opcode == OP_LOAD)
 			return false;
+		if (dom->is_volatile)
+			return false;
 		/* Yeehaa! Found one! */
 		kill_instruction_force(dom);
 	}