From e0b94a3d6ade2f99ded481318e9e6d9f16953662 Mon Sep 17 00:00:00 2001
From: Michael Forney <mforney@mforney.org>
Date: Thu, 11 Mar 2021 19:24:28 -0800
Subject: spill: use stronger assertion for registers in use at start of
 function

---
 amd64/sysv.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'amd64')

diff --git a/amd64/sysv.c b/amd64/sysv.c
index 3125069..045ec85 100644
--- a/amd64/sysv.c
+++ b/amd64/sysv.c
@@ -427,6 +427,7 @@ selpar(Fn *fn, Ins *i0, Ins *i1)
 		fa = argsclass(i0, i1, ac, Opar, &aret, &env);
 	} else
 		fa = argsclass(i0, i1, ac, Opar, 0, &env);
+	fn->reg = amd64_sysv_argregs(CALL(fa), 0);
 
 	for (i=i0, a=ac; i<i1; i++, a++) {
 		if (i->op != Oparc || a->inmem)
-- 
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