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

Run:explore-bc8218b282-20261015-075519
Kind:fallback
Category:translate: call llvm.experimental.constrained.lround.i64.f16
Occurrences:24 in 8 configs, 2 test files
Snippet from:zfh-half-intrinsics-strict.ll @lround_f16 via llvm-extract
Config:-mtriple=riscv64 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi lp64d -disable-strictnode-mutation
Local check:reproduces at bc8218b282
Compiler Explorer:not uploaded (over --godbolt-limit or disabled)

Snippet:

; Function Attrs: nounwind strictfp
define i64 @lround_f16(half %a) #0 {
  %1 = call i64 @llvm.experimental.constrained.lround.i64.f16(half %a, metadata !"fpexcept.strict") #2
  ret i64 %1
}

; Function Attrs: nocallback nofree nosync nounwind strictfp willreturn memory(inaccessiblemem: readwrite)
declare i64 @llvm.experimental.constrained.lround.i64.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=riscv64 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi lp64d -disable-strictnode-mutation -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv64 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi lp64d -disable-strictnode-mutation -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to translate instruction: call llvm.experimental.constrained.lround.i64.f16: '  %1 = call i64 @llvm.experimental.constrained.lround.i64.f16(half %a, metadata !"fpexcept.strict") #2' (in function: lround_f16)
warning: Instruction selection used fallback path for lround_f16

Occurrences (24):

InputFunctionConfig
zfh-half-intrinsics-strict.lllround_f16-mtriple=riscv64 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi lp64d -disable-strictnode-mutation
zfh-half-intrinsics-strict.lllround_f16-mtriple=riscv64 -mattr=+zdinx -mattr=+zhinx -verify-machineinstrs -target-abi lp64
zfh-half-intrinsics-strict.lllround_f16-mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation
zfh-half-intrinsics-strict.lllround_f16-mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.lllround_f16-mtriple=riscv64 -mattr=+d -mattr=+zfhmin -verify-machineinstrs -target-abi lp64d -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.lllround_f16-mtriple=riscv64 -mattr=+zdinx -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64
zfhmin-half-intrinsics-strict.lllround_f16-mtriple=riscv64 -mattr=+zfhmin -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.lllround_f16-mtriple=riscv64 -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
zfh-half-intrinsics-strict.10b90bcd06.ll (mutant of zfh-half-intrinsics-strict.ll)lround_f16-mtriple=riscv64 -mattr=+zdinx -mattr=+zhinx -verify-machineinstrs -target-abi lp64
zfh-half-intrinsics-strict.485437230a.ll (mutant of zfh-half-intrinsics-strict.ll)lround_f16-mtriple=riscv64 -mattr=+zdinx -mattr=+zhinx -verify-machineinstrs -target-abi lp64
zfh-half-intrinsics-strict.575ebfaf57.ll (mutant of zfh-half-intrinsics-strict.ll)lround_f16-mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation
zfh-half-intrinsics-strict.724a5496d2.ll (mutant of zfh-half-intrinsics-strict.ll)lround_f16-mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation
zfh-half-intrinsics-strict.9b048f81d1.ll (mutant of zfh-half-intrinsics-strict.ll)lround_f16-mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
zfh-half-intrinsics-strict.b95919a869.ll (mutant of zfh-half-intrinsics-strict.ll)lround_f16-mtriple=riscv64 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi lp64d -disable-strictnode-mutation
zfh-half-intrinsics-strict.ee6a28087d.ll (mutant of zfh-half-intrinsics-strict.ll)lround_f16-mtriple=riscv64 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi lp64d -disable-strictnode-mutation
zfh-half-intrinsics-strict.f9bb319e08.ll (mutant of zfh-half-intrinsics-strict.ll)lround_f16-mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.20deb15746.ll (mutant of zfhmin-half-intrinsics-strict.ll)lround_f16-mtriple=riscv64 -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.489bfad382.ll (mutant of zfhmin-half-intrinsics-strict.ll)lround_f16-mtriple=riscv64 -mattr=+d -mattr=+zfhmin -verify-machineinstrs -target-abi lp64d -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.7b23da2b6e.ll (mutant of zfhmin-half-intrinsics-strict.ll)lround_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)lround_f16-mtriple=riscv64 -mattr=+zfhmin -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.86815b9628.ll (mutant of zfhmin-half-intrinsics-strict.ll)lround_f16-mtriple=riscv64 -mattr=+zfhmin -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.b0a35206ee.ll (mutant of zfhmin-half-intrinsics-strict.ll)lround_f16-mtriple=riscv64 -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.da43a627db.ll (mutant of zfhmin-half-intrinsics-strict.ll)lround_f16-mtriple=riscv64 -mattr=+zdinx -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64
zfhmin-half-intrinsics-strict.ddd6750140.ll (mutant of zfhmin-half-intrinsics-strict.ll)lround_f16-mtriple=riscv64 -mattr=+zdinx -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64

Generated 2026-10-15 08:05 UTC.