https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96186
Bug ID: 96186
Summary: [11 regressoion] ICE: Unrecognizable insn since
r11-1970-fab263ab0fc10ea08409b80afa7e8569438b8d28
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: wwwhhhyyy333 at gmail dot com
Target Milestone: ---
A testcase extracted from 510.parest_r
#include <math.h>
double square(double d[3], double rad)
{
double res[3];
for (int i = 0; i < 3; i++)
{
res[i] = d[i] * d[i];
res[i] *= rad/sqrt(res[i]);
}
return res[0];
}
Compile with -march=skylake-avx512 -funroll-loops -Ofast
sqrt.c: In function ‘square’:
sqrt.c:14:1: error: unrecognizable insn:
14 | }
| ^
(insn 12 11 13 2 (set (reg:V2DF 93)
(unspec:V2DF [
(reg:V2DF 84 [ vect_powmult_5.8 ])
] UNSPEC_RSQRT)) "sqrt.c":10:21 -1
(nil))
during RTL pass: vregs
sqrt.c:14:1: internal compiler error: in extract_insn, at recog.c:2294
0x6e11f9 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/export/users2/hongyuw1/gcc/gcc/./gcc/rtl-error.c:108
0x6e1215 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/export/users2/hongyuw1/gcc/gcc/./gcc/rtl-error.c:116
0x6df72f extract_insn(rtx_insn*)
/export/users2/hongyuw1/gcc/gcc/./gcc/recog.c:2294
0xafd213 instantiate_virtual_regs_in_insn
/export/users2/hongyuw1/gcc/gcc/./gcc/function.c:1607
0xafd213 instantiate_virtual_regs
/export/users2/hongyuw1/gcc/gcc/./gcc/function.c:1977
0xafd213 execute
/export/users2/hongyuw1/gcc/gcc/./gcc/function.c:2026
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
