From: Georg-Johann Lay <avr@gjlay.de>
Date: Thu, 4 Aug 2016 07:52:38 +0000 (+0000)
Subject: re PR target/70677 (Suboptimal cond on AVR: unneeded stack frame)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=90b1c81d64556c24ef208e7fd012c08b044d847e;p=gcc.git

re PR target/70677 (Suboptimal cond on AVR: unneeded stack frame)

	PR 70677
	* common/config/avr/avr-common.c (avr_option_optimization_table)
	[OPT_LEVELS_ALL]: Turn off -fcaller-saves.

From-SVN: r239117
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 0e5eea4e7ca..940096a131f 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2016-08-04  Georg-Johann Lay  <avr@gjlay.de>
+
+	PR 70677
+	* common/config/avr/avr-common.c (avr_option_optimization_table)
+	[OPT_LEVELS_ALL]: Turn off -fcaller-saves.
+
 2016-08-04  Georg-Johann Lay  <avr@gjlay.de>
 
 	PR 55181
diff --git a/gcc/common/config/avr/avr-common.c b/gcc/common/config/avr/avr-common.c
index d0272e4cda7..75c877175c1 100644
--- a/gcc/common/config/avr/avr-common.c
+++ b/gcc/common/config/avr/avr-common.c
@@ -28,6 +28,9 @@
 static const struct default_options avr_option_optimization_table[] =
   {
     { OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 },
+    // The only effect of -fcaller-saves might be that it triggers
+    // a frame without need when it tries to be smart around calls.
+    { OPT_LEVELS_ALL, OPT_fcaller_saves, NULL, 0 },
     { OPT_LEVELS_NONE, 0, NULL, 0 }
   };