fallback: legalize: G_FMODF s128
| Run: | explore-bc8218b282-20261015-075519 |
| Kind: | fallback |
| Category: | legalize: G_FMODF s128 |
| Occurrences: | 3 in 1 configs, 1 test files |
| Snippet from: | fp128.ll @modf via llvm-extract |
| Config: | -mtriple=riscv32 -verify-machineinstrs |
| Local check: | reproduces at bc8218b282 |
| Compiler Explorer: | not uploaded (over --godbolt-limit or disabled) |
Snippet:
; Function Attrs: nounwind
define { fp128, fp128 } @modf(fp128 %a) #0 {
%result = call { fp128, fp128 } @llvm.modf.f128(fp128 %a)
ret { fp128, fp128 } %result
}
; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare { fp128, fp128 } @llvm.modf.f128(fp128) #1
attributes #0 = { nounwind }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
Reproduce:
llc -mtriple=riscv32 -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -verify-machineinstrs -global-isel=0 snippet.ll -o -
Local llc output:
remark: <unknown>:0:0: unable to legalize instruction: %3:_(s128), %4:_ = G_FMODF %0:_ (in function: modf)
warning: Instruction selection used fallback path for modf
Occurrences (3):
| Input | Function | Config |
|---|
| fp128.ll | modf | -mtriple=riscv32 -verify-machineinstrs |
| fp128.74ff0e5f38.ll (mutant of fp128.ll) | modf | -mtriple=riscv32 -verify-machineinstrs |
| fp128.bad147080a.ll (mutant of fp128.ll) | modf | -mtriple=riscv32 -verify-machineinstrs |
Generated 2026-10-15 08:05 UTC.