fallback: legalize: G_FEXP10 <2 x s16>

Run:explore-bc8218b282-20261015-075519
Kind:fallback
Category:legalize: G_FEXP10 <2 x s16>
Occurrences:2 in 2 configs, 1 test files
Snippet from:llvm.exp10.ll @exp10_v2f16 via llvm-extract
Config:-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d
Local check:reproduces at bc8218b282
Compiler Explorer:not uploaded (over --godbolt-limit or disabled)

Snippet:

define <2 x half> @exp10_v2f16(<2 x half> %x) {
  %r = call <2 x half> @llvm.exp10.v2f16(<2 x half> %x)
  ret <2 x half> %r
}

; Function Attrs: nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none)
declare <2 x half> @llvm.exp10.v2f16(<2 x half>) #0

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

Reproduce:

llc -mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to legalize instruction: %4:_(<2 x s16>) = G_FEXP10 %0:_ (in function: exp10_v2f16)
warning: Instruction selection used fallback path for exp10_v2f16

Occurrences (2):

InputFunctionConfig
llvm.exp10.llexp10_v2f16-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d
llvm.exp10.llexp10_v2f16-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d

Generated 2026-10-15 08:05 UTC.