From 4fa26a60791ec314128a9683fd4d657b251d0268 Mon Sep 17 00:00:00 2001
From: Roger Sayle <roger@eyesopen.com>
Date: Sat, 31 May 2003 13:23:32 +0000
Subject: flags.h (flag_wrapv): New flag controlling overflow semantics.

	* flags.h (flag_wrapv): New flag controlling overflow semantics.
	* toplev.c (flag_wrapv): Declare the variable with default false.
	(lang_independent_options): New option "-fwrapv" to set the above.

	* fold-const.c (extract_muldiv_1): Disable optimization of (2*x)/2
	as x, when signed arithmetic overflow wraps around.
	(fold): Optimize "-A - B" as "-B - A" if overflow wraps around.
	* loop.c (basic_induction_var): Ignore BIVs that rely on undefined
	overflow when flag_wrapv is true.

	* java/lang.c (java_init_options): Prescribe wrap-around two's
	complement arithmetic overflow by setting flag_wrapv.

	* doc/invoke.texi: Document new -fwrapv command line option.
	* doc/c-tree.texi: Mention that the overflow semantics of
	NEGATE_EXPR, PLUS_EXPR, MINUS_EXPR and MULT_EXPR is dependent
	upon both flag_wrapv and flag_trapv.

	* gcc.dg/fwrapv-1.c: New test case.
	* gcc.dg/fwrapv-2.c: New test case.

	* libjava.lang/Overflow.java: New test.
	* libjava.lang/Overflow.out: New file.

From-SVN: r67270
---
 libjava/testsuite/libjava.lang/Overflow.out | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 create mode 100644 libjava/testsuite/libjava.lang/Overflow.out

(limited to 'libjava/testsuite/libjava.lang/Overflow.out')

diff --git a/libjava/testsuite/libjava.lang/Overflow.out b/libjava/testsuite/libjava.lang/Overflow.out
new file mode 100644
index 0000000..e69de29
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