fallback: translate: call llvm.experimental.constrained.uitofp.f64.i32

Run:explore-bc8218b282-20261015-075519
Kind:fallback
Category:translate: call llvm.experimental.constrained.uitofp.f64.i32
Occurrences:38 in 8 configs, 2 test files
Snippet from:double-convert-strict.ll @fcvt_d_wu via llvm-extract
Config:-mtriple=riscv32 -mattr=+d -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32d
Local check:reproduces at bc8218b282
Compiler Explorer:not uploaded (over --godbolt-limit or disabled)

Snippet:

; Function Attrs: nounwind strictfp
define double @fcvt_d_wu(i32 %a) #0 {
  %1 = call double @llvm.experimental.constrained.uitofp.f64.i32(i32 %a, metadata !"round.dynamic", metadata !"fpexcept.strict")
  ret double %1
}

; Function Attrs: nocallback nofree nosync nounwind strictfp willreturn memory(inaccessiblemem: readwrite)
declare double @llvm.experimental.constrained.uitofp.f64.i32(i32, 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 -disable-strictnode-mutation -target-abi=ilp32d -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -mattr=+d -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32d -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to translate instruction: call llvm.experimental.constrained.uitofp.f64.i32: '  %1 = call double @llvm.experimental.constrained.uitofp.f64.i32(i32 %a, metadata !"round.dynamic", metadata !"fpexcept.strict")' (in function: fcvt_d_wu)
warning: Instruction selection used fallback path for fcvt_d_wu

Occurrences (38):

InputFunctionConfig
double-convert-strict.llfcvt_d_wu-mtriple=riscv32 -mattr=+d -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32d
double-convert-strict.llfcvt_d_wu_load-mtriple=riscv32 -mattr=+d -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32d
double-convert-strict.llfcvt_d_wu_demanded_bits-mtriple=riscv32 -mattr=+d -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32d
double-convert-strict.llfcvt_d_wu-mtriple=riscv32 -mattr=+zdinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32
double-convert-strict.llfcvt_d_wu_load-mtriple=riscv32 -mattr=+zdinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32
double-convert-strict.llfcvt_d_wu_demanded_bits-mtriple=riscv32 -mattr=+zdinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32
double-convert-strict.llfcvt_d_wu-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation
double-convert-strict.llfcvt_d_wu_load-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation
double-convert-strict.llfcvt_d_wu_demanded_bits-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation
double-convert-strict.llfcvt_d_wu-mtriple=riscv64 -mattr=+d -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64d
double-convert-strict.llfcvt_d_wu_load-mtriple=riscv64 -mattr=+d -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64d
double-convert-strict.llfcvt_d_wu_demanded_bits-mtriple=riscv64 -mattr=+d -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64d
double-convert-strict.llfcvt_d_wu-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64
double-convert-strict.llfcvt_d_wu_load-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64
double-convert-strict.llfcvt_d_wu_demanded_bits-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64
double-convert-strict.llfcvt_d_wu-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation
double-convert-strict.llfcvt_d_wu_load-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation
double-convert-strict.llfcvt_d_wu_demanded_bits-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation
rv64d-double-convert-strict.lluitofp_aext_i32_to_f64-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d -disable-strictnode-mutation
rv64d-double-convert-strict.lluitofp_sext_i32_to_f64-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d -disable-strictnode-mutation
rv64d-double-convert-strict.lluitofp_zext_i32_to_f64-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d -disable-strictnode-mutation
rv64d-double-convert-strict.lluitofp_aext_i32_to_f64-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64 -disable-strictnode-mutation
rv64d-double-convert-strict.lluitofp_sext_i32_to_f64-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64 -disable-strictnode-mutation
rv64d-double-convert-strict.lluitofp_zext_i32_to_f64-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64 -disable-strictnode-mutation
double-convert-strict.0ea283144c.ll (mutant of double-convert-strict.ll)fcvt_d_wu_load-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation
double-convert-strict.2292561006.ll (mutant of double-convert-strict.ll)fcvt_d_wu_load-mtriple=riscv32 -mattr=+zdinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32
double-convert-strict.2cb5e6b6c9.ll (mutant of double-convert-strict.ll)fcvt_d_wu_load-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64
double-convert-strict.5d84abbb36.ll (mutant of double-convert-strict.ll)fcvt_d_wu_load-mtriple=riscv64 -mattr=+d -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64d
double-convert-strict.6fbe4c988b.ll (mutant of double-convert-strict.ll)fcvt_d_wu_load-mtriple=riscv32 -mattr=+d -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32d
double-convert-strict.e00785df5e.ll (mutant of double-convert-strict.ll)fcvt_d_wu_load-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation
rv64d-double-convert-strict.4c4d03bf77.ll (mutant of rv64d-double-convert-strict.ll)uitofp_aext_i32_to_f64-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d -disable-strictnode-mutation
rv64d-double-convert-strict.4c4d03bf77.ll (mutant of rv64d-double-convert-strict.ll)uitofp_zext_i32_to_f64-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d -disable-strictnode-mutation
rv64d-double-convert-strict.50707da8a5.ll (mutant of rv64d-double-convert-strict.ll)uitofp_aext_i32_to_f64-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d -disable-strictnode-mutation
rv64d-double-convert-strict.b362a2789e.ll (mutant of rv64d-double-convert-strict.ll)uitofp_aext_i32_to_f64-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64 -disable-strictnode-mutation
rv64d-double-convert-strict.b68053e67a.ll (mutant of rv64d-double-convert-strict.ll)uitofp_aext_i32_to_f64-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64 -disable-strictnode-mutation
rv64d-double-convert-strict.b68053e67a.ll (mutant of rv64d-double-convert-strict.ll)uitofp_zext_i32_to_f64-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64 -disable-strictnode-mutation
rv64d-double-convert-strict.e41c48bb68.ll (mutant of rv64d-double-convert-strict.ll)uitofp_sext_i32_to_f64-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64 -disable-strictnode-mutation
rv64d-double-convert-strict.edfd216333.ll (mutant of rv64d-double-convert-strict.ll)uitofp_sext_i32_to_f64-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d -disable-strictnode-mutation

Generated 2026-10-15 08:05 UTC.