fallback: translate: call llvm.experimental.constrained.round.f16

Run:explore-bc8218b282-20261015-075519
Kind:fallback
Category:translate: call llvm.experimental.constrained.round.f16
Occurrences:48 in 16 configs, 2 test files
Snippet from:zfh-half-intrinsics-strict.ll @round_f16 via llvm-extract
Config:-mtriple=riscv32 -mattr=+d -mattr=+zfh -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 @round_f16(half %a) #0 {
  %1 = call half @llvm.experimental.constrained.round.f16(half %a, metadata !"fpexcept.strict") #2
  ret half %1
}

; Function Attrs: nocallback nofree nosync nounwind strictfp willreturn memory(inaccessiblemem: readwrite)
declare half @llvm.experimental.constrained.round.f16(half, 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=+d -mattr=+zfh -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 -mattr=+zfh -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.round.f16: '  %1 = call half @llvm.experimental.constrained.round.f16(half %a, metadata !"fpexcept.strict") #2' (in function: round_f16)
warning: Instruction selection used fallback path for round_f16

Occurrences (48):

InputFunctionConfig
zfh-half-intrinsics-strict.llround_f16-mtriple=riscv32 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation
zfh-half-intrinsics-strict.llround_f16-mtriple=riscv32 -mattr=+zdinx -mattr=+zhinx -verify-machineinstrs -target-abi ilp32
zfh-half-intrinsics-strict.llround_f16-mtriple=riscv32 -mattr=+zfh -verify-machineinstrs -target-abi ilp32f -disable-strictnode-mutation
zfh-half-intrinsics-strict.llround_f16-mtriple=riscv32 -mattr=+zhinx -verify-machineinstrs -target-abi ilp32 -disable-strictnode-mutation
zfh-half-intrinsics-strict.llround_f16-mtriple=riscv64 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi lp64d -disable-strictnode-mutation
zfh-half-intrinsics-strict.llround_f16-mtriple=riscv64 -mattr=+zdinx -mattr=+zhinx -verify-machineinstrs -target-abi lp64
zfh-half-intrinsics-strict.llround_f16-mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation
zfh-half-intrinsics-strict.llround_f16-mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.llround_f16-mtriple=riscv32 -mattr=+d -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.llround_f16-mtriple=riscv32 -mattr=+zdinx -mattr=+zhinxmin -verify-machineinstrs -target-abi ilp32
zfhmin-half-intrinsics-strict.llround_f16-mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.llround_f16-mtriple=riscv32 -mattr=+zhinxmin -verify-machineinstrs -target-abi ilp32 -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.llround_f16-mtriple=riscv64 -mattr=+d -mattr=+zfhmin -verify-machineinstrs -target-abi lp64d -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.llround_f16-mtriple=riscv64 -mattr=+zdinx -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64
zfhmin-half-intrinsics-strict.llround_f16-mtriple=riscv64 -mattr=+zfhmin -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.llround_f16-mtriple=riscv64 -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
zfh-half-intrinsics-strict.00be8d03b9.ll (mutant of zfh-half-intrinsics-strict.ll)round_f16-mtriple=riscv64 -mattr=+zdinx -mattr=+zhinx -verify-machineinstrs -target-abi lp64
zfh-half-intrinsics-strict.10b90bcd06.ll (mutant of zfh-half-intrinsics-strict.ll)round_f16-mtriple=riscv64 -mattr=+zdinx -mattr=+zhinx -verify-machineinstrs -target-abi lp64
zfh-half-intrinsics-strict.2fa523a2b1.ll (mutant of zfh-half-intrinsics-strict.ll)round_f16-mtriple=riscv32 -mattr=+zfh -verify-machineinstrs -target-abi ilp32f -disable-strictnode-mutation
zfh-half-intrinsics-strict.46d4ea8100.ll (mutant of zfh-half-intrinsics-strict.ll)round_f16-mtriple=riscv32 -mattr=+zhinx -verify-machineinstrs -target-abi ilp32 -disable-strictnode-mutation
zfh-half-intrinsics-strict.543dfe4fd6.ll (mutant of zfh-half-intrinsics-strict.ll)round_f16-mtriple=riscv32 -mattr=+zdinx -mattr=+zhinx -verify-machineinstrs -target-abi ilp32
zfh-half-intrinsics-strict.575ebfaf57.ll (mutant of zfh-half-intrinsics-strict.ll)round_f16-mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation
zfh-half-intrinsics-strict.59f502d22d.ll (mutant of zfh-half-intrinsics-strict.ll)round_f16-mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation
zfh-half-intrinsics-strict.5cd0f7498a.ll (mutant of zfh-half-intrinsics-strict.ll)round_f16-mtriple=riscv32 -mattr=+zdinx -mattr=+zhinx -verify-machineinstrs -target-abi ilp32
zfh-half-intrinsics-strict.66adaaed46.ll (mutant of zfh-half-intrinsics-strict.ll)round_f16-mtriple=riscv32 -mattr=+zhinx -verify-machineinstrs -target-abi ilp32 -disable-strictnode-mutation
zfh-half-intrinsics-strict.8ed24ed0dc.ll (mutant of zfh-half-intrinsics-strict.ll)round_f16-mtriple=riscv32 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation
zfh-half-intrinsics-strict.98659546cc.ll (mutant of zfh-half-intrinsics-strict.ll)round_f16-mtriple=riscv32 -mattr=+zfh -verify-machineinstrs -target-abi ilp32f -disable-strictnode-mutation
zfh-half-intrinsics-strict.b913532a02.ll (mutant of zfh-half-intrinsics-strict.ll)round_f16-mtriple=riscv64 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi lp64d -disable-strictnode-mutation
zfh-half-intrinsics-strict.baccfe24cb.ll (mutant of zfh-half-intrinsics-strict.ll)round_f16-mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
zfh-half-intrinsics-strict.ee6a28087d.ll (mutant of zfh-half-intrinsics-strict.ll)round_f16-mtriple=riscv64 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi lp64d -disable-strictnode-mutation
zfh-half-intrinsics-strict.ef7e9ae3ef.ll (mutant of zfh-half-intrinsics-strict.ll)round_f16-mtriple=riscv32 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation
zfh-half-intrinsics-strict.f9bb319e08.ll (mutant of zfh-half-intrinsics-strict.ll)round_f16-mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.3a5304a94a.ll (mutant of zfhmin-half-intrinsics-strict.ll)round_f16-mtriple=riscv64 -mattr=+zfhmin -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.3c8b8b1787.ll (mutant of zfhmin-half-intrinsics-strict.ll)round_f16-mtriple=riscv64 -mattr=+d -mattr=+zfhmin -verify-machineinstrs -target-abi lp64d -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.45037a1707.ll (mutant of zfhmin-half-intrinsics-strict.ll)round_f16-mtriple=riscv32 -mattr=+zhinxmin -verify-machineinstrs -target-abi ilp32 -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.4cb74453c1.ll (mutant of zfhmin-half-intrinsics-strict.ll)round_f16-mtriple=riscv32 -mattr=+d -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.60919d1e46.ll (mutant of zfhmin-half-intrinsics-strict.ll)round_f16-mtriple=riscv32 -mattr=+zdinx -mattr=+zhinxmin -verify-machineinstrs -target-abi ilp32
zfhmin-half-intrinsics-strict.7b23da2b6e.ll (mutant of zfhmin-half-intrinsics-strict.ll)round_f16-mtriple=riscv64 -mattr=+d -mattr=+zfhmin -verify-machineinstrs -target-abi lp64d -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.85d6162e36.ll (mutant of zfhmin-half-intrinsics-strict.ll)round_f16-mtriple=riscv64 -mattr=+zfhmin -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.9b358597d0.ll (mutant of zfhmin-half-intrinsics-strict.ll)round_f16-mtriple=riscv32 -mattr=+d -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.9d5892a5ab.ll (mutant of zfhmin-half-intrinsics-strict.ll)round_f16-mtriple=riscv64 -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.afa1a4a95f.ll (mutant of zfhmin-half-intrinsics-strict.ll)round_f16-mtriple=riscv32 -mattr=+zhinxmin -verify-machineinstrs -target-abi ilp32 -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.b0a35206ee.ll (mutant of zfhmin-half-intrinsics-strict.ll)round_f16-mtriple=riscv64 -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.ca68ceea2d.ll (mutant of zfhmin-half-intrinsics-strict.ll)round_f16-mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.d9bbb4225b.ll (mutant of zfhmin-half-intrinsics-strict.ll)round_f16-mtriple=riscv32 -mattr=+zdinx -mattr=+zhinxmin -verify-machineinstrs -target-abi ilp32
zfhmin-half-intrinsics-strict.da43a627db.ll (mutant of zfhmin-half-intrinsics-strict.ll)round_f16-mtriple=riscv64 -mattr=+zdinx -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64
zfhmin-half-intrinsics-strict.ddefb7f336.ll (mutant of zfhmin-half-intrinsics-strict.ll)round_f16-mtriple=riscv64 -mattr=+zdinx -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64
zfhmin-half-intrinsics-strict.e2fae7a962.ll (mutant of zfhmin-half-intrinsics-strict.ll)round_f16-mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f -disable-strictnode-mutation

Generated 2026-10-15 08:05 UTC.