From: Jakub Jelinek <jakub@redhat.com>
Date: Tue, 24 Jun 2014 15:13:32 +0000 (+0200)
Subject: re PR target/61570 (-march=native CPU you selected does not support x86-64 instructio... 
X-Git-Tag: releases/gcc-4.8.4~395
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9cdcef5b77d5c0177184148fbcde05407ff0c2d5;p=thirdparty%2Fgcc.git

re PR target/61570 (-march=native CPU you selected does not support x86-64 instruction under QEMU)

	PR target/61570
	* config/i386/driver-i386.c (host_detect_local_cpu): For unknown
	model family 6 CPU with has_longmode never use a CPU without
	64-bit support.

From-SVN: r211948
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 45da7447803b..44896fb50d19 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2014-06-24  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/61570
+	* config/i386/driver-i386.c (host_detect_local_cpu): For unknown
+	model family 6 CPU with has_longmode never use a CPU without
+	64-bit support.
+
 2014-06-20  Chung-Lin Tang  <cltang@codesourcery.com>
 
 	Backport from mainline
diff --git a/gcc/config/i386/driver-i386.c b/gcc/config/i386/driver-i386.c
index 148fbc227c1b..87b6a1b4ab6b 100644
--- a/gcc/config/i386/driver-i386.c
+++ b/gcc/config/i386/driver-i386.c
@@ -713,6 +713,11 @@ const char *host_detect_local_cpu (int argc, const char **argv)
 		    /* Assume Core 2.  */
 		    cpu = "core2";
 		}
+	      else if (has_longmode)
+		/* Perhaps some emulator?  Assume x86-64, otherwise gcc
+		   -march=native would be unusable for 64-bit compilations,
+		   as all the CPUs below are 32-bit only.  */
+		cpu = "x86-64";
 	      else if (has_sse3)
 		/* It is Core Duo.  */
 		cpu = "pentium-m";