fallback: translate: icmp <vscale x 4 x i32>

Snippet:

define target("riscv.vector.tuple", <vscale x 16 x i8>, 2) @test_tuple_zero_insert1(<vscale x 4 x i32> %a) {
entry:
  %A3 = alloca i1, align 1
  store i1 poison, ptr %A3, align 1
  %A = alloca <vscale x 4 x i1>, align 1
  %L1 = load double, ptr %A, align 8
  %L = load double, ptr %A, align 8
  store <vscale x 4 x i1> poison, ptr %A, align 1
  %C = icmp ule <vscale x 4 x i32> %a, %a
  %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)
  %C2 = fcmp uno double %L, %L1
  store <vscale x 4 x i1> %C, ptr %A, align 1
  store i1 %C2, ptr %A3, align 1
  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: icmp: '  %C = icmp ule <vscale x 4 x i32> %a, %a' (in function: test_tuple_zero_insert1)
warning: Instruction selection used fallback path for test_tuple_zero_insert1

Occurrences (2):

Generated 2026-10-15 08:05 UTC.