[PR103302] skip multi-word pre-move clobber during lra

If we emit clobbers before multi-word moves during lra, we get
confused if a copy ends up with input or output replaced with each
other: the clobber then kills the previous set, and it gets deleted.

This patch avoids emitting such clobbers when lra_in_progress.


for  gcc/ChangeLog

	PR target/103302
	* expr.c (emit_move_multi_word): Skip clobber during lra.

for  gcc/testsuite/ChangeLog

	PR target/103302
	* gcc.target/riscv/pr103302.c: New.

1 files changed, 1 insertions, 1 deletions

diff --git a/gcc/expr.c b/gcc/expr.c
index b281525..0365625 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -3929,7 +3929,7 @@ emit_move_multi_word (machine_mode mode, rtx x, rtx y)
      hard regs shouldn't appear here except as return values.
      We never want to emit such a clobber after reload.  */
   if (x != y
-      && ! (reload_in_progress || reload_completed)
+      && ! (lra_in_progress || reload_in_progress || reload_completed)
       && need_clobber != 0)
     emit_clobber (x);