From 812bb36e322c36719e66ce8443ff583058d53461 Mon Sep 17 00:00:00 2001
From: lemon <lsof@mailbox.org>
Date: Sun, 2 Nov 2025 19:25:03 +0100
Subject: isel: fix 3-address add when used for flags in branch

---
 amd64/isel.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'amd64')

diff --git a/amd64/isel.c b/amd64/isel.c
index 49efce8..133868e 100644
--- a/amd64/isel.c
+++ b/amd64/isel.c
@@ -477,6 +477,9 @@ seljmp(struct function *fn, struct block *blk)
                ins->r = insertinstr(blk, curi, mkinstr(Ocopy, ins->cls, ZEROREF));
             }
             ins->keep = 1;
+         } else if (instrtab[c.i].op == Oadd) {
+            /* prevent a 3-address add whose flag results are used from becoming a LEA */
+            instrtab[c.i].inplace = 1;
          }
       }
    } else if (blk->jmp.t == Jret) {
-- 
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