fallback: translate: call llvm.experimental.constrained.uitofp.f16.i128
| Run: | explore-bc8218b282-20261015-075519 |
| Kind: | fallback |
| Category: | translate: call llvm.experimental.constrained.uitofp.f16.i128 |
| Occurrences: | 9 in 3 configs, 1 test files |
| Snippet from: | rv64-half-convert-strict.ll @uitofp_i128_to_f16 via llvm-extract |
| Config: | -mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation |
| Local check: | reproduces at bc8218b282 |
| Compiler Explorer: | not uploaded (over --godbolt-limit or disabled) |
Snippet:
; Function Attrs: nounwind strictfp
define half @uitofp_i128_to_f16(i128 %a) #0 {
%1 = call half @llvm.experimental.constrained.uitofp.f16.i128(i128 %a, metadata !"round.dynamic", metadata !"fpexcept.strict")
ret half %1
}
; Function Attrs: nocallback nofree nosync nounwind strictfp willreturn memory(inaccessiblemem: readwrite)
declare half @llvm.experimental.constrained.uitofp.f16.i128(i128, metadata, metadata) #1
attributes #0 = { nounwind strictfp }
attributes #1 = { nocallback nofree nosync nounwind strictfp willreturn memory(inaccessiblemem: readwrite) }
Reproduce:
llc -mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation -global-isel=0 snippet.ll -o -
Local llc output:
remark: <unknown>:0:0: unable to translate instruction: call llvm.experimental.constrained.uitofp.f16.i128: ' %1 = call half @llvm.experimental.constrained.uitofp.f16.i128(i128 %a, metadata !"round.dynamic", metadata !"fpexcept.strict")' (in function: uitofp_i128_to_f16)
warning: Instruction selection used fallback path for uitofp_i128_to_f16
Occurrences (9):
| Input | Function | Config |
|---|
| rv64-half-convert-strict.ll | uitofp_i128_to_f16 | -mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation |
| rv64-half-convert-strict.ll | uitofp_i128_to_f16 | -mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation |
| rv64-half-convert-strict.ll | uitofp_i128_to_f16 | -mtriple=riscv64 -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation |
| rv64-half-convert-strict.270fc8ce32.ll (mutant of rv64-half-convert-strict.ll) | uitofp_i128_to_f16 | -mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation |
| rv64-half-convert-strict.2a5a503480.ll (mutant of rv64-half-convert-strict.ll) | uitofp_i128_to_f16 | -mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation |
| rv64-half-convert-strict.49a2befc7e.ll (mutant of rv64-half-convert-strict.ll) | uitofp_i128_to_f16 | -mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation |
| rv64-half-convert-strict.59840bd0df.ll (mutant of rv64-half-convert-strict.ll) | uitofp_i128_to_f16 | -mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation |
| rv64-half-convert-strict.b1b496a99e.ll (mutant of rv64-half-convert-strict.ll) | uitofp_i128_to_f16 | -mtriple=riscv64 -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation |
| rv64-half-convert-strict.d1339208d6.ll (mutant of rv64-half-convert-strict.ll) | uitofp_i128_to_f16 | -mtriple=riscv64 -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation |
Generated 2026-10-15 08:05 UTC.