fallback: legalize: G_UDIV <4 x s16>

Run:explore-04ca53e65f-20261014-114124
Kind:fallback
Category:legalize: G_UDIV <4 x s16>
Occurrences:2 in 1 configs, 2 test files
Snippet from:rvp-simd-64.ll @test_pudiv_h via llvm-extract
Config:-mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs
Local check:reproduces at 04ca53e65f
Compiler Explorer:not uploaded (over --godbolt-limit or disabled)

Snippet:

define <4 x i16> @test_pudiv_h(<4 x i16> %a, <4 x i16> %b) {
  %res = udiv <4 x i16> %a, %b
  ret <4 x i16> %res
}

Reproduce:

llc -mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs -global-isel=0 snippet.ll -o -

Local llc output:

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

Occurrences (2):

InputFunctionConfig
rvp-simd-64.lltest_pudiv_h-mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs
rvp-zip.343a076050.ll (mutant of rvp-zip.ll)test_unzip16hp_v4i16-mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs

Generated 2026-10-15 08:05 UTC.