From: Jeff Law <law@gcc.gnu.org>
Date: Wed, 14 Jul 1999 22:29:48 +0000 (-0600)
Subject: reload.c (find_reloads): Emit a USE for a pseudo register without a hard register... 
X-Git-Tag: prereleases/gcc-2.95-test~32
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8ab4cd1d5c95936efcd59c31a43973a8a367d3ae;p=thirdparty%2Fgcc.git

reload.c (find_reloads): Emit a USE for a pseudo register without a hard register if...

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        * reload.c (find_reloads): Emit a USE for a pseudo register without
        a hard register if we could not create an optional reload for the
        pseudo.

From-SVN: r28101
---

diff --git a/gcc/reload.c b/gcc/reload.c
index 011f89955c6e..d8b41363d363 100644
--- a/gcc/reload.c
+++ b/gcc/reload.c
@@ -3803,11 +3803,16 @@ find_reloads (insn, replace, ind_levels, live_known, reload_reg_p)
 			   (insn_code_number < 0 ? 0
 			    : insn_operand_strict_low[insn_code_number][i]),
 			   1, i, operand_type[i]);
-	/* If a memory reference remains, yet we can't make an optional
+	/* If a memory reference remains (either as a MEM or a pseudo that
+	   did not get a hard register), yet we can't make an optional
 	   reload, check if this is actually a pseudo register reference;
 	   we then need to emit a USE and/or a CLOBBER so that reload
 	   inheritance will do the right thing.  */
-	else if (replace && GET_CODE (operand) == MEM)
+	else if (replace
+		 && (GET_CODE (operand) == MEM
+		     || (GET_CODE (operand) == REG
+			 && REGNO (operand) >= FIRST_PSEUDO_REGISTER
+			 && reg_renumber [REGNO (operand)] < 0)))
 	  {
 	    operand = *recog_operand_loc[i];