fallback: legalize: G_INSERT_SUBVECTOR <vscale x 4 x s16>,<8 x s16>

Run:explore-bc8218b282-20261015-075519
Kind:fallback
Category:legalize: G_INSERT_SUBVECTOR <vscale x 4 x s16>,<8 x s16>
Occurrences:38 in 6 configs, 2 test files
Snippet from:nontemporal.ll @test_nontemporal_load_v8i16 via llvm-extract
Config:-mtriple=riscv32 -mattr=+zihintntl,+f,+d,+zfh,+v
Local check:reproduces at bc8218b282
Compiler Explorer:not uploaded (over --godbolt-limit or disabled)

Snippet:

define <8 x i16> @test_nontemporal_load_v8i16(ptr %p) {
  %1 = load <8 x i16>, ptr %p, align 16, !nontemporal !0
  ret <8 x i16> %1
}

!0 = !{i32 1}

Reproduce:

llc -mtriple=riscv32 -mattr=+zihintntl,+f,+d,+zfh,+v -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -mattr=+zihintntl,+f,+d,+zfh,+v -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to legalize instruction: %3:_(<vscale x 4 x s16>) = G_INSERT_SUBVECTOR %2:_, %1:_(<8 x s16>), 0 (in function: test_nontemporal_load_v8i16)
warning: Instruction selection used fallback path for test_nontemporal_load_v8i16

Occurrences (38):

InputFunctionConfig
nontemporal.lltest_nontemporal_load_v8i16-mtriple=riscv32 -mattr=+zihintntl,+f,+d,+zfh,+v
nontemporal.lltest_nontemporal_P1_load_v8i16-mtriple=riscv32 -mattr=+zihintntl,+f,+d,+zfh,+v
nontemporal.lltest_nontemporal_PALL_load_v8i16-mtriple=riscv32 -mattr=+zihintntl,+f,+d,+zfh,+v
nontemporal.lltest_nontemporal_S1_load_v8i16-mtriple=riscv32 -mattr=+zihintntl,+f,+d,+zfh,+v
nontemporal.lltest_nontemporal_ALL_load_v8i16-mtriple=riscv32 -mattr=+zihintntl,+f,+d,+zfh,+v
nontemporal.lltest_nontemporal_load_v8i16-mtriple=riscv64 -mattr=+zihintntl,+f,+d,+zfh,+v
nontemporal.lltest_nontemporal_P1_load_v8i16-mtriple=riscv64 -mattr=+zihintntl,+f,+d,+zfh,+v
nontemporal.lltest_nontemporal_PALL_load_v8i16-mtriple=riscv64 -mattr=+zihintntl,+f,+d,+zfh,+v
nontemporal.lltest_nontemporal_S1_load_v8i16-mtriple=riscv64 -mattr=+zihintntl,+f,+d,+zfh,+v
nontemporal.lltest_nontemporal_ALL_load_v8i16-mtriple=riscv64 -mattr=+zihintntl,+f,+d,+zfh,+v
pr94265.llPR94265-mtriple=riscv32-- -mattr=+v
pr94265.llPR94265-mtriple=riscv32-- -mattr=+zve32x,+zvl128b
pr94265.llPR94265-mtriple=riscv64-- -mattr=+v
pr94265.llPR94265-mtriple=riscv64-- -mattr=+zve32x,+zvl128b
nontemporal.15e4431e03.ll (mutant of nontemporal.ll)test_nontemporal_S1_load_v8i16-mtriple=riscv32 -mattr=+zihintntl,+f,+d,+zfh,+v
nontemporal.32da9a971c.ll (mutant of nontemporal.ll)test_nontemporal_S1_load_v8i16-mtriple=riscv64 -mattr=+zihintntl,+f,+d,+zfh,+v
nontemporal.c5d81fd6bf.ll (mutant of nontemporal.ll)test_nontemporal_P1_load_v8i16-mtriple=riscv32 -mattr=+zihintntl,+f,+d,+zfh,+v
nontemporal.ee36472a79.ll (mutant of nontemporal.ll)test_nontemporal_P1_load_v8i16-mtriple=riscv64 -mattr=+zihintntl,+f,+d,+zfh,+v
pr94265.179122eb99.ll (mutant of pr94265.ll)PR94265-mtriple=riscv32-- -mattr=+zve32x,+zvl128b
pr94265.23452bdd2d.ll (mutant of pr94265.ll)PR94265-mtriple=riscv64-- -mattr=+zve32x,+zvl128b
pr94265.2951918556.ll (mutant of pr94265.ll)PR94265-mtriple=riscv64-- -mattr=+zve32x,+zvl128b
pr94265.39239119c3.ll (mutant of pr94265.ll)PR94265-mtriple=riscv64-- -mattr=+v
pr94265.3d42a5ee34.ll (mutant of pr94265.ll)PR94265-mtriple=riscv32-- -mattr=+zve32x,+zvl128b
pr94265.5759197a5a.ll (mutant of pr94265.ll)PR94265-mtriple=riscv32-- -mattr=+v
pr94265.6786020809.ll (mutant of pr94265.ll)PR94265-mtriple=riscv32-- -mattr=+v
pr94265.6d1758445c.ll (mutant of pr94265.ll)PR94265-mtriple=riscv64-- -mattr=+v
pr94265.a8afaeabee.ll (mutant of pr94265.ll)PR94265-mtriple=riscv64-- -mattr=+zve32x,+zvl128b
pr94265.ac412324ad.ll (mutant of pr94265.ll)PR94265-mtriple=riscv32-- -mattr=+zve32x,+zvl128b
pr94265.af75c6b088.ll (mutant of pr94265.ll)PR94265-mtriple=riscv64-- -mattr=+zve32x,+zvl128b
pr94265.b6c54f65fd.ll (mutant of pr94265.ll)PR94265-mtriple=riscv64-- -mattr=+v
pr94265.bc0d24932c.ll (mutant of pr94265.ll)PR94265-mtriple=riscv32-- -mattr=+v
pr94265.da454adfc4.ll (mutant of pr94265.ll)PR94265-mtriple=riscv32-- -mattr=+v
pr94265.e40303af37.ll (mutant of pr94265.ll)PR94265-mtriple=riscv64-- -mattr=+v
pr94265.e48b2d0e5c.ll (mutant of pr94265.ll)PR94265-mtriple=riscv32-- -mattr=+zve32x,+zvl128b
pr94265.eb00dd163a.ll (mutant of pr94265.ll)PR94265-mtriple=riscv32-- -mattr=+zve32x,+zvl128b
pr94265.ee9d810acd.ll (mutant of pr94265.ll)PR94265-mtriple=riscv32-- -mattr=+v
pr94265.f06ae14524.ll (mutant of pr94265.ll)PR94265-mtriple=riscv64-- -mattr=+zve32x,+zvl128b
pr94265.fda496a717.ll (mutant of pr94265.ll)PR94265-mtriple=riscv64-- -mattr=+v

Generated 2026-10-15 08:05 UTC.