From 3721f2603495ef947aacccf59ffd27dba1fa06c8 Mon Sep 17 00:00:00 2001
From: wilson <wilson@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 24 Dec 2002 15:49:24 +0000
Subject: [PATCH] Fix v850 PlumHall testsuite failure. * alias.c
(record_set): Handle multi-reg hard registers.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@60474 138bc75d-0d04-0410-961f-82ee72b054a4
---
gcc/ChangeLog | 4 ++++
gcc/alias.c | 17 +++++++++++++++++
2 files changed, 21 insertions(+)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 388076dfa281..e23c31a95b26 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2002-12-24 Jim Wilson <wilson@redhat.com>
+
+ * alias.c (record_set): Handle multi-reg hard registers.
+
2002-12-24 Kazu Hirata <kazu@cs.umass.edu>
* regmove.c: Fix comment typos.
diff --git a/gcc/alias.c b/gcc/alias.c
index 12029f053cd1..fee64b1e50df 100644
--- a/gcc/alias.c
+++ b/gcc/alias.c
@@ -932,6 +932,7 @@ record_set (dest, set, data)
{
unsigned regno;
rtx src;
+ int n;
if (GET_CODE (dest) != REG)
return;
@@ -941,6 +942,22 @@ record_set (dest, set, data)
if (regno >= reg_base_value_size)
abort ();
+ /* If this spans multiple hard registers, then we must indicate that every
+ register has an unusable value. */
+ if (regno < FIRST_PSEUDO_REGISTER)
+ n = HARD_REGNO_NREGS (regno, GET_MODE (dest));
+ else
+ n = 1;
+ if (n != 1)
+ {
+ while (--n >= 0)
+ {
+ reg_seen[regno + n] = 1;
+ new_reg_base_value[regno + n] = 0;
+ }
+ return;
+ }
+
if (set)
{
/* A CLOBBER wipes out any old value but does not prevent a previously
--
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