From 76ad1b306c2db89146438547f63ab6e9fc1b62a3 Mon Sep 17 00:00:00 2001
From: sof <unknown>
Date: Thu, 28 Feb 2002 18:54:53 +0000
Subject: [PATCH] [project @ 2002-02-28 18:54:53 by sof] stg_gc_unpt_r1_ret:
 if R1 isn't mapped to a real register, keep it on the
 stack.

I confess to 'pushing symbols' here a bit, as the exact
nature (and function) of stg_gc_unpt_r1_info isn't clear
to me (documentation isn't abundant, for one.) However,
it will now behave in a manner consistent with what
the code generator emits in the unregisterised case.
---
 ghc/rts/HeapStackCheck.hc |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/ghc/rts/HeapStackCheck.hc b/ghc/rts/HeapStackCheck.hc
index c216cc9..55c3988 100644
--- a/ghc/rts/HeapStackCheck.hc
+++ b/ghc/rts/HeapStackCheck.hc
@@ -1,5 +1,5 @@
 /* -----------------------------------------------------------------------------
- * $Id: HeapStackCheck.hc,v 1.24 2002/02/28 16:25:15 sof Exp $
+ * $Id: HeapStackCheck.hc,v 1.25 2002/02/28 18:54:53 sof Exp $
  *
  * (c) The GHC Team, 1998-1999
  *
@@ -669,9 +669,14 @@ INFO_TABLE_SRT_BITMAP(stg_gc_unpt_r1_info, stg_gc_unpt_r1_ret, 0/*BITMAP*/,
 EXTFUN(stg_gc_unpt_r1_ret)
 {
   FB_
+#ifdef REG_R1
   R1.w = Sp[0];
   Sp += 1;
   JMP_(ENTRY_CODE(Sp[0]));
+#else
+  /* Keep R1 on the stack */
+  JMP_(ENTRY_CODE(Sp[1]));
+#endif
   FE_
 }
 
-- 
1.7.10.4