fallback: translate: call llvm.experimental.constrained.sitofp.f16.i64

Run:explore-bc8218b282-20261015-075519
Kind:fallback
Category:translate: call llvm.experimental.constrained.sitofp.f16.i64
Occurrences:34 in 17 configs, 1 test files
Snippet from:half-convert-strict.ll @fcvt_h_l via llvm-extract
Config:-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation
Local check:reproduces at bc8218b282
Compiler Explorer:not uploaded (over --godbolt-limit or disabled)

Snippet:

; Function Attrs: nounwind strictfp
define half @fcvt_h_l(i64 %a) #0 {
  %1 = call half @llvm.experimental.constrained.sitofp.f16.i64(i64 %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.sitofp.f16.i64(i64, metadata, metadata) #1

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

Reproduce:

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

Local llc output:

remark: <unknown>:0:0: unable to translate instruction: call llvm.experimental.constrained.sitofp.f16.i64: '  %1 = call half @llvm.experimental.constrained.sitofp.f16.i64(i64 %a, metadata !"round.dynamic", metadata !"fpexcept.strict")' (in function: fcvt_h_l)
warning: Instruction selection used fallback path for fcvt_h_l

Occurrences (34):

InputFunctionConfig
half-convert-strict.llfcvt_h_l-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation
half-convert-strict.llfcvt_h_l-mtriple=riscv32 -mattr=+d,+zfh -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation
half-convert-strict.llfcvt_h_l-mtriple=riscv32 -mattr=+d,+zfhmin -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation
half-convert-strict.llfcvt_h_l-mtriple=riscv32 -mattr=+zdinx,+zhinx -verify-machineinstrs -target-abi ilp32 -disable-strictnode-mutation
half-convert-strict.llfcvt_h_l-mtriple=riscv32 -mattr=+zdinx,+zhinxmin -verify-machineinstrs -target-abi ilp32 -disable-strictnode-mutation
half-convert-strict.llfcvt_h_l-mtriple=riscv32 -mattr=+zfh -verify-machineinstrs -target-abi ilp32f -disable-strictnode-mutation
half-convert-strict.llfcvt_h_l-mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f -disable-strictnode-mutation
half-convert-strict.llfcvt_h_l-mtriple=riscv32 -mattr=+zhinx -verify-machineinstrs -target-abi ilp32 -disable-strictnode-mutation
half-convert-strict.llfcvt_h_l-mtriple=riscv32 -mattr=+zhinxmin -verify-machineinstrs -target-abi ilp32 -disable-strictnode-mutation
half-convert-strict.llfcvt_h_l-mtriple=riscv64 -mattr=+d,+zfh -verify-machineinstrs -target-abi lp64d -disable-strictnode-mutation
half-convert-strict.llfcvt_h_l-mtriple=riscv64 -mattr=+d,+zfhmin -verify-machineinstrs -target-abi lp64d -disable-strictnode-mutation
half-convert-strict.llfcvt_h_l-mtriple=riscv64 -mattr=+zdinx,+zhinx -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
half-convert-strict.llfcvt_h_l-mtriple=riscv64 -mattr=+zdinx,+zhinxmin -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
half-convert-strict.llfcvt_h_l-mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation
half-convert-strict.llfcvt_h_l-mtriple=riscv64 -mattr=+zfhmin -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation
half-convert-strict.llfcvt_h_l-mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
half-convert-strict.llfcvt_h_l-mtriple=riscv64 -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
half-convert-strict.04433e30e5.ll (mutant of half-convert-strict.ll)fcvt_h_l-mtriple=riscv32 -mattr=+zhinx -verify-machineinstrs -target-abi ilp32 -disable-strictnode-mutation
half-convert-strict.16acbbd070.ll (mutant of half-convert-strict.ll)fcvt_h_l-mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
half-convert-strict.178b931de6.ll (mutant of half-convert-strict.ll)fcvt_h_l-mtriple=riscv32 -mattr=+zfh -verify-machineinstrs -target-abi ilp32f -disable-strictnode-mutation
half-convert-strict.39629c7903.ll (mutant of half-convert-strict.ll)fcvt_h_l-mtriple=riscv32 -mattr=+zdinx,+zhinx -verify-machineinstrs -target-abi ilp32 -disable-strictnode-mutation
half-convert-strict.60523f295f.ll (mutant of half-convert-strict.ll)fcvt_h_l-mtriple=riscv64 -mattr=+zfhmin -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation
half-convert-strict.6adc865796.ll (mutant of half-convert-strict.ll)fcvt_h_l-mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f -disable-strictnode-mutation
half-convert-strict.74e03dcd76.ll (mutant of half-convert-strict.ll)fcvt_h_l-mtriple=riscv32 -mattr=+d,+zfhmin -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation
half-convert-strict.763e2f5ab8.ll (mutant of half-convert-strict.ll)fcvt_h_l-mtriple=riscv32 -mattr=+zhinxmin -verify-machineinstrs -target-abi ilp32 -disable-strictnode-mutation
half-convert-strict.77da3b7672.ll (mutant of half-convert-strict.ll)fcvt_h_l-mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation
half-convert-strict.79b88604d0.ll (mutant of half-convert-strict.ll)fcvt_h_l-mtriple=riscv64 -mattr=+d,+zfh -verify-machineinstrs -target-abi lp64d -disable-strictnode-mutation
half-convert-strict.89de16c003.ll (mutant of half-convert-strict.ll)fcvt_h_l-mtriple=riscv64 -mattr=+zdinx,+zhinx -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
half-convert-strict.ae4de19932.ll (mutant of half-convert-strict.ll)fcvt_h_l-mtriple=riscv32 -mattr=+d,+zfh -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation
half-convert-strict.c7a89dd0ad.ll (mutant of half-convert-strict.ll)fcvt_h_l-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation
half-convert-strict.dc9832e091.ll (mutant of half-convert-strict.ll)fcvt_h_l-mtriple=riscv64 -mattr=+d,+zfhmin -verify-machineinstrs -target-abi lp64d -disable-strictnode-mutation
half-convert-strict.de75ddb4f5.ll (mutant of half-convert-strict.ll)fcvt_h_l-mtriple=riscv64 -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
half-convert-strict.e7ad945214.ll (mutant of half-convert-strict.ll)fcvt_h_l-mtriple=riscv32 -mattr=+zdinx,+zhinxmin -verify-machineinstrs -target-abi ilp32 -disable-strictnode-mutation
half-convert-strict.f48c6a77e8.ll (mutant of half-convert-strict.ll)fcvt_h_l-mtriple=riscv64 -mattr=+zdinx,+zhinxmin -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation

Generated 2026-10-15 08:05 UTC.