fallback: translate: call llvm.experimental.constrained.fptoui.i128.f16

Run:main-04ca53e65f-20261014-113325
Kind:fallback
Category:translate: call llvm.experimental.constrained.fptoui.i128.f16
Occurrences:9 in 3 configs, 1 test files
Snippet from:rv64-half-convert-strict.ll @fptoui_f16_to_i128 via llvm-extract
Config:-mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation
Local check:reproduces at 04ca53e65f
Compiler Explorer:not uploaded (over --godbolt-limit or disabled)

Snippet:

; Function Attrs: nounwind strictfp
define i128 @fptoui_f16_to_i128(half %a) #0 {
  %1 = call i128 @llvm.experimental.constrained.fptoui.i128.f16(half %a, metadata !"fpexcept.strict")
  ret i128 %1
}

; Function Attrs: nocallback nofree nosync nounwind strictfp willreturn memory(inaccessiblemem: readwrite)
declare i128 @llvm.experimental.constrained.fptoui.i128.f16(half, 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.fptoui.i128.f16: '  %1 = call i128 @llvm.experimental.constrained.fptoui.i128.f16(half %a, metadata !"fpexcept.strict")' (in function: fptoui_f16_to_i128)
warning: Instruction selection used fallback path for fptoui_f16_to_i128

Occurrences (9):

InputFunctionConfig
rv64-half-convert-strict.llfptoui_f16_to_i128-mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation
rv64-half-convert-strict.llfptoui_f16_to_i128-mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
rv64-half-convert-strict.llfptoui_f16_to_i128-mtriple=riscv64 -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
rv64-half-convert-strict.11e4405f46.ll (mutant of rv64-half-convert-strict.ll)fptoui_f16_to_i128-mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation
rv64-half-convert-strict.3b047603f3.ll (mutant of rv64-half-convert-strict.ll)fptoui_f16_to_i128-mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
rv64-half-convert-strict.cd06a0010a.ll (mutant of rv64-half-convert-strict.ll)fptoui_f16_to_i128-mtriple=riscv64 -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
rv64-half-convert-strict.e5260b5875.ll (mutant of rv64-half-convert-strict.ll)fptoui_f16_to_i128-mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation
rv64-half-convert-strict.f584a2da7d.ll (mutant of rv64-half-convert-strict.ll)fptoui_f16_to_i128-mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f -disable-strictnode-mutation
rv64-half-convert-strict.fb08f0d2ec.ll (mutant of rv64-half-convert-strict.ll)fptoui_f16_to_i128-mtriple=riscv64 -verify-machineinstrs -target-abi lp64 -disable-strictnode-mutation

Generated 2026-10-15 08:05 UTC.