https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81471
Bug ID: 81471
Summary: internal compiler error: in curr_insn_transform, at
lra-constraints.c:3495
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: gcp at sjeng dot org
Target Milestone: ---
gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.4)
-Wall -Wextra -pipe -O3 -g -ffast-math -march=native -flto -fopenmp -std=c++11
-DNDEBUG -D_CONSOLE
UCTSearch.cpp:130:1: error: unable to generate reloads for:
}
^
(insn 1085 1084 1086 88 (set (reg:DI 538 [ D.12393 ])
(zero_extend:DI (rotatert:SI (subreg:SI (reg/v:DI 321 [ s0 ]) 0)
(const_int -23 [0xffffffffffffffe9])))) Random.cpp:30 590
{*bmi2_rorxsi3_1_zext}
(nil))
UCTSearch.cpp:130:1: internal compiler error: in curr_insn_transform, at
lra-constraints.c:3495
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.
lto-wrapper: fatal error: /usr/bin/g++-5.real returned 1 exit status
compilation terminated.
/usr/bin/ld.bfd.real: error: lto-wrapper failed
The offending function is:
uint64 Random::random(void) {
const uint64 s0 = s[0];
uint64 s1 = s[1];
const uint64 result = s0 + s1;
s1 ^= s0;
s[0] = Utils::rotl(s0, 55) ^ s1 ^ (s1 << 14); <<<<<<<<<<<<<<<
s[1] = Utils::rotl(s1, 36);
return result;
}
In another module there is:
inline uint32 rotl(const uint32 x, const int k) {
return (x << k) | (x >> (32 - k));
}
Note that the code is buggy, the rotl should be using 64-bit integers. But gcc
shouldn't ICE.
