fallback: legalize: G_BSWAP <2 x s32>

Run:main-04ca53e65f-20261014-105623
Kind:fallback
Category:legalize: G_BSWAP <2 x s32>
Occurrences:1 in 1 configs, 1 test files
Snippet from:rvp-simd-64.ll @test_bswap_v2i32 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 <2 x i32> @test_bswap_v2i32(<2 x i32> %a) {
  %res = call <2 x i32> @llvm.bswap.v2i32(<2 x i32> %a)
  ret <2 x i32> %res
}

; Function Attrs: nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none)
declare <2 x i32> @llvm.bswap.v2i32(<2 x i32>) #0

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

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: %1:_(<2 x s32>) = G_BSWAP %0:_ (in function: test_bswap_v2i32)
warning: Instruction selection used fallback path for test_bswap_v2i32

Occurrences (1):

InputFunctionConfig
rvp-simd-64.lltest_bswap_v2i32-mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs

Generated 2026-10-15 08:05 UTC.