From: John Carr <jfc@mit.edu>
Date: Fri, 17 Apr 1998 14:41:49 +0000 (+0000)
Subject: Patch from John Carr to fix sparc v9 failure.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=77e6b0eb6094880a5989fbd87a09fc772f73f575;p=gcc.git

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
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d19b93ea7b6..97902681319 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 4d9361ce9bc..40b0aa54e51 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)