fallback: legalize: G_FDIV <3 x s32>

Run:explore-04ca53e65f-20261014-114124
Kind:fallback
Category:legalize: G_FDIV <3 x s32> NEW
Occurrences:2 in 2 configs, 1 test files
Snippet from:llvm.exp10.395b542be5.ll (mutant of llvm.exp10.ll) @exp10_v3f32 via llvm-extract
Config:-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d
Local check:reproduces at 04ca53e65f
Compiler Explorer:not uploaded (over --godbolt-limit or disabled)

Snippet:

define <3 x float> @exp10_v3f32(<3 x float> %x) {
  %A = alloca <3 x float>, align 16
  store <3 x float> poison, ptr %A, align 16
  %r = call <3 x float> @llvm.exp10.v3f32(<3 x float> %x)
  %B = fdiv <3 x float> %x, splat (float f0x7F7FFFFF)
  store <3 x float> %B, ptr %A, align 16
  ret <3 x float> %r
}

; Function Attrs: nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none)
declare <3 x float> @llvm.exp10.v3f32(<3 x float>) #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: %10:_(<3 x s32>) = G_FDIV %0:_, %8:_ (in function: exp10_v3f32)
warning: Instruction selection used fallback path for exp10_v3f32

Occurrences (2):

InputFunctionConfig
llvm.exp10.395b542be5.ll (mutant of llvm.exp10.ll)exp10_v3f32-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d
llvm.exp10.9def224b19.ll (mutant of llvm.exp10.ll)exp10_v3f32-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d

Generated 2026-10-15 08:05 UTC.