https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70280
Bug ID: 70280
Summary: -fcompare-debug failure (length) with
--param=integer-share-limit=4016 -mavx512bw
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Target: x86_64-pc-linux-gnu
Created attachment 38000
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38000&action=edit
quite reduced testcase
Compiler output:
$ gcc --param=integer-share-limit=4016 -mavx512bw -fcompare-debug
testcase-min4.c
...
gcc: error: testcase-min4.c: -fcompare-debug failure (length)
$ gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest/bin/gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-234258-checking-yes-rtl-df-nographite/bin/../libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-checking=yes,rtl,df --without-cloog --without-ppl --without-isl
--disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-234258-checking-yes-rtl-df-nographite
Thread model: posix
gcc version 6.0.0 20160316 (experimental) (GCC)
$ diff -u /tmp/ccjXoibm.gkd /tmp/ccv30gMz.gk.gkd
--- /tmp/ccjXoibm.gkd 2016-03-17 17:05:30.128234688 +0100
+++ /tmp/ccv30gMz.gk.gkd 2016-03-17 17:05:36.668234748 +0100
@@ -10658,7 +10658,7 @@
0: extern int va_start ();
4: extern int va_end ();
1: struct args[1];
-2: static int BIO_vsnprintf (char *, size_t, const char *, struct *, void,
...);
+2: static int BIO_vsnprintf (char *, size_t, const char *, struct *);
7: void <L1>;
;; Function BIO_snprintf (BIO_snprintf, funcdef_no=12, cgraph_uid=12,
symbol_order=12)
The file is auto-reduced from openssl-1.0.1h b_print.c, licensed under SSLeay
( https://www.openssl.org/source/license.txt ) (likely not GPL compatible).
Each iteration of delta removes a few lines, but reducing the testcase is very
slow and the testcase is still quite long (now after 4 delta iterations).
Fails both gcc-5-branch and gcc-trunk; gcc-4_9-branch doesn't support
-mavx512bw.
