From 77e6b0eb6094880a5989fbd87a09fc772f73f575 Mon Sep 17 00:00:00 2001
From: John Carr <jfc@mit.edu>
Date: Fri, 17 Apr 1998 14:41:49 +0000
Subject: [PATCH] Patch from John Carr to fix sparc v9 failure.
* emit-rtl.c (operand_subword_force): If a register can not be
accessed by words, copy it to a pseudo register.
From-SVN: r19267
---
gcc/ChangeLog | 5 +++++
gcc/emit-rtl.c | 9 ++++++++-
2 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d19b93ea7b6c..979026813190 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+Fri Apr 17 14:30:37 1998 John Carr <jfc@mit.edu>
+
+ * emit-rtl.c (operand_subword_force): If a register can not be
+ accessed by words, copy it to a pseudo register.
+
Fri Apr 17 14:30:37 1998 Jim Wilson <wilson@cygnus.com>
* rs6000/vxppc.h (CPP_SPEC): Add support for mrelocatable*.
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c
index 4d9361ce9bc5..40b0aa54e519 100644
--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -1380,7 +1380,14 @@ operand_subword_force (op, i, mode)
return result;
if (mode != BLKmode && mode != VOIDmode)
- op = force_reg (mode, op);
+ {
+ /* If this is a register which can not be accessed by words, copy it
+ to a pseudo register. */
+ if (GET_CODE (op) == REG)
+ op = copy_to_reg (op);
+ else
+ op = force_reg (mode, op);
+ }
result = operand_subword (op, i, 1, mode);
if (result == 0)
--
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