fallback: legalize: G_EXTRACT_VECTOR_ELT s16,<2 x s16>,s32

Run:explore-bc8218b282-20261015-075519
Kind:fallback
Category:legalize: G_EXTRACT_VECTOR_ELT s16,<2 x s16>,s32
Occurrences:10 in 6 configs, 2 test files
Snippet from:rvp-srl-bitcast-bv.ll @srl_bitcast_buildvector_extract_last via llvm-extract
Config:-mtriple=riscv32 -mattr=+experimental-p,+m,+zbb
Local check:reproduces at bc8218b282
Compiler Explorer:not uploaded (over --godbolt-limit or disabled)

Snippet:

define i16 @srl_bitcast_buildvector_extract_last(<2 x i16> %v, ptr %p) {
  %div = sdiv <2 x i16> splat (i16 1), %v
  store <2 x i16> %div, ptr %p, align 4
  %e = extractelement <2 x i16> %div, i64 1
  ret i16 %e
}

Reproduce:

llc -mtriple=riscv32 -mattr=+experimental-p,+m,+zbb -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -mattr=+experimental-p,+m,+zbb -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to legalize instruction: %5:_(s16) = G_EXTRACT_VECTOR_ELT %4:_(<2 x s16>), %6:_(s32) (in function: srl_bitcast_buildvector_extract_last)
warning: Instruction selection used fallback path for srl_bitcast_buildvector_extract_last

Occurrences (10):

InputFunctionConfig
rvp-srl-bitcast-bv.llsrl_bitcast_buildvector_extract_last-mtriple=riscv32 -mattr=+experimental-p,+m,+zbb
fp-fcanonicalize.241c2240d6.ll (mutant of fp-fcanonicalize.ll)fcanonicalize_v2f16_nnan--mtriple=riscv32 --mattr=+d,+zfh
fp-fcanonicalize.35e5558d18.ll (mutant of fp-fcanonicalize.ll)fcanonicalize_v2f16_nnan-mtriple=riscv32 -mattr=+zhinx -target-abi=ilp32 -verify-machineinstrs
fp-fcanonicalize.af7cc6b126.ll (mutant of fp-fcanonicalize.ll)fcanonicalize_v2f16_nnan--mtriple=riscv32
fp-fcanonicalize.f01c28ecbe.ll (mutant of fp-fcanonicalize.ll)fcanonicalize_v2f16_nnan-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs
fp-fcanonicalize.fd0f4bb1df.ll (mutant of fp-fcanonicalize.ll)fcanonicalize_v2f16_nnan--mtriple=riscv32 --mattr=+d,-zfh
rvp-srl-bitcast-bv.4885c5451c.ll (mutant of rvp-srl-bitcast-bv.ll)srl_bitcast_buildvector_extract_last-mtriple=riscv32 -mattr=+experimental-p,+m,+zbb
rvp-srl-bitcast-bv.7ff1ecbc68.ll (mutant of rvp-srl-bitcast-bv.ll)srl_bitcast_buildvector_extract_last-mtriple=riscv32 -mattr=+experimental-p,+m,+zbb
rvp-srl-bitcast-bv.8bce7177c9.ll (mutant of rvp-srl-bitcast-bv.ll)srl_bitcast_buildvector_extract_last-mtriple=riscv32 -mattr=+experimental-p,+m,+zbb
rvp-srl-bitcast-bv.a5d2cde189.ll (mutant of rvp-srl-bitcast-bv.ll)srl_bitcast_buildvector_extract_last-mtriple=riscv32 -mattr=+experimental-p,+m,+zbb

Generated 2026-10-15 08:05 UTC.