https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89238
Bug ID: 89238
Summary: cc1 hangs after <simdclone>
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: konstantin.vladimirov at gmail dot com
Target Milestone: ---
Reproduction after creduce:
---
a, b, c, d, f, g, h, i, j, k;
unsigned long e;
l(m) {
unsigned n = 0;
unsigned long o = g + (e >> 5) - 7;
for (; j; j++)
g = g + 30 - b;
for (; k; k++)
h = b * f & i * b * 7 & b;
for (; n < 9; n += 3) {
j = 0;
for (; j < 14; j++) {
d = 8 | h & o | g << 1 ^ a & 5 & a + (a << 3);
o = h * g * 3 + c + ~o;
}
}
}
p() {
l(0);
l(0);
}
---
> gcc -w -O3 minimize.c
Hangs forever (or at least long enough to make user unhappy, I think for such
simple reproduction "forever" starts from 5 minutes).
Compiler information:
---
> gcc -v
COLLECT_GCC=/apps/gcc/8.2.0/.bin/gcc
COLLECT_LTO_WRAPPER=/apps/gcc/8.2.0/.bin/../libexec/gcc/x86_64-suse-linux/8.2.0/lto-wrapper
Target: x86_64-suse-linux
Configured with: ./configure --prefix=/apps/gcc/8.2.0
--libdir=/apps/gcc/8.2.0/lib64 --libexecdir=/apps/gcc/8.2.0/libexec
--bindir=/apps/gcc/8.2.0/bin --with-isl=/apps/gcc/8.2.0
--with-libelf=/apps/gcc/8.2.0 --with-mpfr=/apps/gcc/8.2.0
--with-gmp=/apps/gcc/8.2.0 --with-mpc=/apps/gcc/8.2.0
--disable-gnu-unique-object --enable-gold=yes --enable-lto
--enable-languages=c,c++,objc,fortran --build=x86_64-suse-linux
--host=x86_64-suse-linux --target=x86_64-suse-linux --enable-libotm
--disable-libstdcxx-pch
Thread model: posix
gcc version 8.2.0 (GCC)
---
I ran cc1 and output is:
---
> cc1 -w -O3 minimize.c
l p
Analyzing compilation unit
Performing interprocedural optimizations
<*free_lang_data> <visibility> <build_ssa_passes> <opt_local_passes>
<targetclone> <free-fnsummary> <whole-program> <profile_estimate> <icf>
<devirt> <cp> <fnsummary> <inline> <pure-const> <free-fnsummary> <static-var>
<single-use> <comdats>Assembling functions:
<materialize-all-clones> <simdclone> l
---
I.e. it is hanging after simdclone
