Re: [PATCH] Fix runtime error: left shift of negative value (PR, ipa/78555).

[Jeff Law]

On 12/01/2016 02:54 AM, Martin Liška wrote:

As described in the PR, we do couple of shifts of a negative value.
Fixed in the patch
and couple of new unit tests are added.

Patch can bootstrap on ppc64le-redhat-linux and survives regression tests.

Ready to be installed?
Martin

0001-Fix-runtime-error-left-shift-of-negative-value-PR-ip.patch


From 61a6b5e0c973bd77341a1053609c7ad331691a9e Mon Sep 17 00:00:00 2001
From: marxin <mli...@suse.cz>
Date: Wed, 30 Nov 2016 15:24:48 +0100
Subject: [PATCH] Fix runtime error: left shift of negative value (PR
 ipa/78555).

gcc/ChangeLog:

2016-11-30  Martin Liska  <mli...@suse.cz>

        PR ipa/78555
        * sreal.c (sreal::to_int): Make absolute value before shifting.
        (sreal::operator/): Likewise.
        (sreal_verify_negative_division): New test.
        (void sreal_c_tests): Call the new test.
        * sreal.h (sreal::normalize_up): Use new SREAL_ABS and
        SREAL_SIGN macros.
        (sreal::normalize_down): Likewise.

OK.
jeff