fallback: translate: call llvm.riscv.tuple.insert.triscv.vector.tuple_nxv16i8_2t.nxv4i32

Snippet:

define target("riscv.vector.tuple", <vscale x 16 x i8>, 2) @test_tuple_zero_insert1(<vscale x 4 x i32> %a) {
entry:
  %0 = call target("riscv.vector.tuple", <vscale x 16 x i8>, 2) @llvm.riscv.tuple.insert.triscv.vector.tuple_nxv16i8_2t.nxv4i32(target("riscv.vector.tuple", <vscale x 16 x i8>, 2) zeroinitializer, <vscale x 4 x i32> %a, i32 0)
  ret target("riscv.vector.tuple", <vscale x 16 x i8>, 2) %0
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare target("riscv.vector.tuple", <vscale x 16 x i8>, 2) @llvm.riscv.tuple.insert.triscv.vector.tuple_nxv16i8_2t.nxv4i32(target("riscv.vector.tuple", <vscale x 16 x i8>, 2), <vscale x 4 x i32>, i32 immarg) #0

attributes #0 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

Reproduce:

llc -mtriple=riscv32 -mattr=+v -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -mattr=+v -verify-machineinstrs -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to translate instruction: call llvm.riscv.tuple.insert.triscv.vector.tuple_nxv16i8_2t.nxv4i32: '  %0 = call target("riscv.vector.tuple", <vscale x 16 x i8>, 2) @llvm.riscv.tuple.insert.triscv.vector.tuple_nxv16i8_2t.nxv4i32(target("riscv.vector.tuple", <vscale x 16 x i8>, 2) zeroinitializer, <vscale x 4 x i32> %a, i32 0)' (in function: test_tuple_zero_insert1)
warning: Instruction selection used fallback path for test_tuple_zero_insert1

Occurrences (8):

Generated 2026-10-15 08:05 UTC.