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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/64111] [5.0 regression] ICE: conversion of register to a different size
Date: Sun, 30 Nov 2014 17:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64111

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW

--- Comment #16 from H.J. Lu <hjl.tools at gmail dot com> ---
The small testcase failed with GCC 4.8:

Testing /export/project/git/gcc-regression/master/190324/usr/bin/gcc:
rm -f *.o *.out
g++ -march=core-avx2 -O3 -fvisibility=hidden  -x c++-header -c "qt_pch.ii" -o
pch.out
g++ -c -include .pch/Qt5Core -march=core-avx2 -O3 -fvisibility=hidden  -o
"file.o" "file.ii"
file.ii: In member function \u2018int A::m_fn1()\u2019:
file.ii:10:5: error: conversion of register to a different size
 int A::m_fn1() {
     ^
VIEW_CONVERT_EXPR<vector(4) long long int>(vect_var_.23_79);

vect_.27_83 = VIEW_CONVERT_EXPR<vector(4) long long int>(vect_var_.23_79);

file.ii:10:5: error: conversion of register to a different size
VIEW_CONVERT_EXPR<vector(4) long long int>(vect_var_.24_81);

vect_.28_85 = VIEW_CONVERT_EXPR<vector(4) long long int>(vect_var_.24_81);

file.ii:10:5: internal compiler error: verify_gimple failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make: *** [file.o] Error 1
Search ended: Fails from the first revision 190324.
Can not make sure it is a regression from that version.
[hjl@gnu-mic-2 gcc-regression]$
/export/project/git/gcc-regression/master/190324/usr/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/export/project/git/gcc-regression/master/190324/usr/bin/gcc
COLLECT_LTO_WRAPPER=/export/project/git/gcc-regression/master/190324/usr/libexec/gcc/x86_64-unknown-linux-gnu/4.8.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../../../gcc/configure
--prefix=/export/project/git/gcc-regression/master/190324/usr
--enable-clocale=gnu --with-system-zlib --with-demangler-in-ld
MAKEINFO=/usr/bin/false --enable-languages=c,c++,fortran --disable-bootstrap
Thread model: posix
gcc version 4.8.0 20120812 (experimental) [trunk revision 190324] (GCC) 
[hjl@gnu-mic-2 gcc-regression]$