From cd3c6bbca899b1b9da262a81ef21b80a6148922d Mon Sep 17 00:00:00 2001
From: Jan Hubicka <jh@suse.cz>
Date: Thu, 11 Nov 2010 01:17:34 +0100
Subject: [PATCH] re PR c++/38699 (ICE using offsetof with pointer and array
 accesses)

	PR tree-optimize/38669
	* gcc.dg/tree-ssa/pr38699.c

From-SVN: r166579
---
 gcc/testsuite/ChangeLog                 |  5 ++
 gcc/testsuite/gcc.dg/tree-ssa/pr38699.c | 76 +++++++++++++++++++++++++
 2 files changed, 81 insertions(+)
 create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/pr38699.c

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 3ee4e80a08a..ea2341e4e61 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2010-11-10  Jan Hubicka  <jh@suse.cz>
+
+	PR tree-optimize/38669
+	* gcc.dg/tree-ssa/pr38699.c
+
 2010-11-10  Jan Hubicka  <jh@suse.cz>
 
 	* gcc.dg/tree-prof/inliner-1.c: Fix testcase.
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr38699.c b/gcc/testsuite/gcc.dg/tree-ssa/pr38699.c
new file mode 100644
index 00000000000..6845324e41a
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr38699.c
@@ -0,0 +1,76 @@
+/* { dg-do compile } */
+/* { dg-options "-Os -fdump-tree-optimized" } */
+/*
+ * License: GPL
+ * Copyright: (c) 2007 by Till Harbaum <till@harbaum.org>
+ * Copyright: (c) 2008 Wolfgang Moser, http://d81.de
+ */
+
+/* #include <avr/wdt.h> */
+/* some declarations from the include above for ATMega8 */
+#define _SFR_IO8(io_addr) (*(volatile unsigned char *)((io_addr) + 0x20))
+#define TOV0    0
+#define TCNT0    _SFR_IO8(0x32)
+#define TIFR    _SFR_IO8(0x38)
+#define DDRC    _SFR_IO8(0x14)
+#define DDRD    _SFR_IO8(0x11)
+#define PORTC    _SFR_IO8(0x15)
+#define PORTD    _SFR_IO8(0x12)
+
+static void delay_wait_us( unsigned char timeout ) {
+    __asm__ __volatile__ ("wdr");
+
+    TCNT0 = timeout;
+    TIFR |= (1 << (TOV0));
+
+    /* wait until counter overflows */
+    while(!(TIFR & (1 << (TOV0))));
+}
+
+static void delay_wait_us_ms( unsigned char timeout ) {
+    delay_wait_us( timeout * 1000 );
+}
+
+
+void makeUseOfTimerWait( unsigned char val ) {
+    delay_wait_us( 10 );
+    DDRC |= 0x10;
+    delay_wait_us( 10 );
+    DDRD |= 0x20;
+
+    delay_wait_us( 20 );
+    PORTC &= ~0x10;
+    delay_wait_us( 10 );
+    PORTD &= ~0x20;
+
+    delay_wait_us_ms( 5 );
+    delay_wait_us_ms( 5 );
+    delay_wait_us_ms( 5 );
+    delay_wait_us_ms( 5 );
+    delay_wait_us_ms( 5 );
+    delay_wait_us_ms( 5 );
+    delay_wait_us_ms( 5 );
+    delay_wait_us_ms( 5 );
+    delay_wait_us_ms( 5 );
+    delay_wait_us_ms( 5 );
+    delay_wait_us_ms( 5 );
+    delay_wait_us_ms( 5 );
+    delay_wait_us_ms( 5 );
+    delay_wait_us_ms( 5 );
+    delay_wait_us_ms( 5 );
+    delay_wait_us_ms( 5 );
+    delay_wait_us_ms( 5 );
+    delay_wait_us_ms( 5 );
+    delay_wait_us_ms( 5 );
+    delay_wait_us_ms( 5 );
+
+    PORTC |= val & 0x10;
+    delay_wait_us( 10 );
+    PORTD |= val & 0x20;
+
+    delay_wait_us( 10 );
+}
+/* We should not inline the delay loops.  */
+/* { dg-final { scan-tree-dump "delay_wait_us" "optimized"} } */
+/* { dg-final { scan-tree-dump "delay_wait_us_ms" "optimized"} } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */