[Bug target/97141] [10/11 Regression] aarch64, SVE: ICE in decompose, at rtl.h (during expand) since r10-4676-g9c437a108a
acoplan at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Wed Dec 16 14:10:36 GMT 2020
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97141
--- Comment #2 from Alex Coplan <acoplan at gcc dot gnu.org> ---
Adding -fno-tree-forwprop gives us an ICE in LRA instead:
$ aarch64-elf-gcc -c pr97141.c -O3 -march=armv8.2-a+sve -fno-tree-forwprop
during RTL pass: reload
pr97141.c: In function 'g':
pr97141.c:8:1: internal compiler error: maximum number of generated reload
insns per insn achieved (90)
8 | }
| ^
0xc08d23 lra_constraints(bool)
/home/alecop01/toolchain/src/gcc/gcc/lra-constraints.c:5061
0xbeff49 lra(_IO_FILE*)
/home/alecop01/toolchain/src/gcc/gcc/lra.c:2329
0xba2af8 do_reload
/home/alecop01/toolchain/src/gcc/gcc/ira.c:5802
0xba2af8 execute
/home/alecop01/toolchain/src/gcc/gcc/ira.c:5988
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.
Originally noticed this LRA ICE with the related testcase:
int a;
void b() {
a = 0;
for (; a != -24; a = (short)a - 3) {
short *c;
*c |= 0 < b;
}
}
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