From: Segher Boessenkool <segher@kernel.crashing.org>
Date: Fri, 19 Sep 2014 16:42:26 +0000 (+0200)
Subject: recog.c (scratch_operand): Do not simply allow all hard registers: only allow those... 
X-Git-Tag: releases/gcc-5.1.0~4562
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f8fb3155820ca6cd39f2f7dbec796b399f705aa5;p=thirdparty%2Fgcc.git

recog.c (scratch_operand): Do not simply allow all hard registers: only allow those that are allocatable.

2014-09-19  Segher Boessenkool  <segher@kernel.crashing.org>

	* recog.c (scratch_operand): Do not simply allow all hard registers:
	only allow those that are allocatable.

From-SVN: r215399
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 261eda3bc95c..22b068d1cc56 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2014-09-19  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	* recog.c (scratch_operand): Do not simply allow all hard registers:
+	only allow those that are allocatable.
+
 2014-09-19  Felix Yang  <felix.yang@huawei.com>
 
 	* cfgrtl.c ira.c ira-color.c ira-conflicts ira-lives.c: Update
diff --git a/gcc/recog.c b/gcc/recog.c
index b1838094cc1b..5ee3816c7cfd 100644
--- a/gcc/recog.c
+++ b/gcc/recog.c
@@ -1143,7 +1143,9 @@ scratch_operand (rtx op, enum machine_mode mode)
 
   return (GET_CODE (op) == SCRATCH
 	  || (REG_P (op)
-	      && (lra_in_progress || REGNO (op) < FIRST_PSEUDO_REGISTER)));
+	      && (lra_in_progress
+		  || (REGNO (op) < FIRST_PSEUDO_REGISTER
+		      && REGNO_REG_CLASS (REGNO (op)) != NO_REGS))));
 }
 
 /* Return 1 if OP is a valid immediate operand for mode MODE.