fallback: translate: call llvm.experimental.constrained.sitofp.f32.i32

Run:explore-bc8218b282-20261015-075519
Kind:fallback
Category:translate: call llvm.experimental.constrained.sitofp.f32.i32
Occurrences:42 in 8 configs, 2 test files
Snippet from:float-convert-strict.ll @fcvt_s_w via llvm-extract
Config:-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f
Local check:reproduces at bc8218b282
Compiler Explorer:not uploaded (over --godbolt-limit or disabled)

Snippet:

; Function Attrs: nounwind strictfp
define float @fcvt_s_w(i32 %a) #0 {
  %1 = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 %a, metadata !"round.dynamic", metadata !"fpexcept.strict")
  ret float %1
}

; Function Attrs: nocallback nofree nosync nounwind strictfp willreturn memory(inaccessiblemem: readwrite)
declare float @llvm.experimental.constrained.sitofp.f32.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=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to translate instruction: call llvm.experimental.constrained.sitofp.f32.i32: '  %1 = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 %a, metadata !"round.dynamic", metadata !"fpexcept.strict")' (in function: fcvt_s_w)
warning: Instruction selection used fallback path for fcvt_s_w

Occurrences (42):

InputFunctionConfig
float-convert-strict.llfcvt_s_w-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f
float-convert-strict.llfcvt_s_w_load-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f
float-convert-strict.llfcvt_s_w_demanded_bits-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f
float-convert-strict.llfcvt_s_w-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32
float-convert-strict.llfcvt_s_w_load-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32
float-convert-strict.llfcvt_s_w_demanded_bits-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32
float-convert-strict.llfcvt_s_w-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation
float-convert-strict.llfcvt_s_w_load-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation
float-convert-strict.llfcvt_s_w_demanded_bits-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation
float-convert-strict.llfcvt_s_w-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f
float-convert-strict.llfcvt_s_w_load-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f
float-convert-strict.llfcvt_s_w_demanded_bits-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f
float-convert-strict.llfcvt_s_w-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64
float-convert-strict.llfcvt_s_w_load-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64
float-convert-strict.llfcvt_s_w_demanded_bits-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64
float-convert-strict.llfcvt_s_w-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation
float-convert-strict.llfcvt_s_w_load-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation
float-convert-strict.llfcvt_s_w_demanded_bits-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation
rv64f-float-convert-strict.llsitofp_aext_i32_to_f32-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation
rv64f-float-convert-strict.llsitofp_sext_i32_to_f32-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation
rv64f-float-convert-strict.llsitofp_zext_i32_to_f32-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation
rv64f-float-convert-strict.llsitofp_aext_i32_to_f32-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation
rv64f-float-convert-strict.llsitofp_sext_i32_to_f32-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation
rv64f-float-convert-strict.llsitofp_zext_i32_to_f32-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation
float-convert-strict.00835023f0.ll (mutant of float-convert-strict.ll)fcvt_s_w_load-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32
float-convert-strict.086a70ddce.ll (mutant of float-convert-strict.ll)fcvt_s_w_load-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f
float-convert-strict.11259c7ef1.ll (mutant of float-convert-strict.ll)fcvt_s_w_load-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation
float-convert-strict.537b049740.ll (mutant of float-convert-strict.ll)fcvt_s_w_demanded_bits-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation
float-convert-strict.5886a7cb33.ll (mutant of float-convert-strict.ll)fcvt_s_w_load-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f
float-convert-strict.58add84d41.ll (mutant of float-convert-strict.ll)fcvt_s_w_demanded_bits-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f
float-convert-strict.72c5faeab6.ll (mutant of float-convert-strict.ll)fcvt_s_w_demanded_bits-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f
float-convert-strict.8d6f28195f.ll (mutant of float-convert-strict.ll)fcvt_s_w_demanded_bits-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation
float-convert-strict.bbf77ad912.ll (mutant of float-convert-strict.ll)fcvt_s_w_demanded_bits-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32
float-convert-strict.db93db564e.ll (mutant of float-convert-strict.ll)fcvt_s_w_load-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64
float-convert-strict.f2a230fab7.ll (mutant of float-convert-strict.ll)fcvt_s_w_demanded_bits-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64
float-convert-strict.f6cf66dbf8.ll (mutant of float-convert-strict.ll)fcvt_s_w_load-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation
rv64f-float-convert-strict.1bf93c590d.ll (mutant of rv64f-float-convert-strict.ll)sitofp_aext_i32_to_f32-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation
rv64f-float-convert-strict.4c269e57ac.ll (mutant of rv64f-float-convert-strict.ll)sitofp_aext_i32_to_f32-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation
rv64f-float-convert-strict.9289b3a1d8.ll (mutant of rv64f-float-convert-strict.ll)sitofp_zext_i32_to_f32-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation
rv64f-float-convert-strict.b9da8d4a51.ll (mutant of rv64f-float-convert-strict.ll)sitofp_zext_i32_to_f32-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation
rv64f-float-convert-strict.d1258ec303.ll (mutant of rv64f-float-convert-strict.ll)sitofp_aext_i32_to_f32-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation
rv64f-float-convert-strict.d5a5ba2c19.ll (mutant of rv64f-float-convert-strict.ll)sitofp_aext_i32_to_f32-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation

Generated 2026-10-15 08:05 UTC.