From f846e0de9b4d71d063dd1e40e15e1493f449e22a Mon Sep 17 00:00:00 2001
From: Richard Henderson <rth@redhat.com>
Date: Thu, 7 Dec 2000 11:29:24 -0800
Subject: [PATCH] flow.c (calculate_global_regs_live): Force the stack pointer
live after reload as well.
* flow.c (calculate_global_regs_live): Force the stack pointer live
after reload as well.
From-SVN: r38114
---
gcc/ChangeLog | 5 +++++
gcc/flow.c | 6 +++---
2 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 0587e1a06e3b..a82ff39004b5 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2000-12-07 Richard Henderson <rth@redhat.com>
+
+ * flow.c (calculate_global_regs_live): Force the stack pointer live
+ after reload as well.
+
2000-12-07 Bruce Korb <bkorb@gnu.org>
* fixinc/Makefile.*(exeext): the variables are exeext, the
diff --git a/gcc/flow.c b/gcc/flow.c
index 1e51d20038bf..92b500290793 100644
--- a/gcc/flow.c
+++ b/gcc/flow.c
@@ -3368,14 +3368,14 @@ calculate_global_regs_live (blocks_in, blocks_out, flags)
IOR_REG_SET (new_live_at_end, sb->global_live_at_start);
}
+ /* The all-important stack pointer must always be live. */
+ SET_REGNO_REG_SET (new_live_at_end, STACK_POINTER_REGNUM);
+
/* Before reload, there are a few registers that must be forced
live everywhere -- which might not already be the case for
blocks within infinite loops. */
if (! reload_completed)
{
- /* The all-important stack pointer. */
- SET_REGNO_REG_SET (new_live_at_end, STACK_POINTER_REGNUM);
-
/* Any reference to any pseudo before reload is a potential
reference of the frame pointer. */
SET_REGNO_REG_SET (new_live_at_end, FRAME_POINTER_REGNUM);
--
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