fallback: legalize: G_STRICT_FMA s32

Snippet:

; Function Attrs: nounwind strictfp
define float @fmadd_s(float %a, float %b, float %c) #0 {
  %1 = call float @llvm.experimental.constrained.fma.f32(float %a, float %b, float %c, metadata !"round.dynamic", metadata !"fpexcept.strict") #2
  ret float %1
}

; Function Attrs: nocallback nofree nosync nounwind strictfp willreturn memory(inaccessiblemem: readwrite)
declare float @llvm.experimental.constrained.fma.f32(float, float, float, metadata, metadata) #1

attributes #0 = { nounwind strictfp }
attributes #1 = { nocallback nofree nosync nounwind strictfp willreturn memory(inaccessiblemem: readwrite) }
attributes #2 = { strictfp }

Reproduce:

llc -mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to legalize instruction: %3:_(s32) = G_STRICT_FMA %0:_, %1:_, %2:_ (in function: fmadd_s)
warning: Instruction selection used fallback path for fmadd_s

Occurrences (66) (first 50):

Generated 2026-10-15 08:05 UTC.