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

Run:	explore-04ca53e65f-20261014-114124
Kind:	fallback
Category:	translate: call llvm.experimental.constrained.uitofp.f32.i32
Occurrences:	46 in 8 configs, 2 test files
Snippet from:	float-convert-strict.ll @fcvt_s_wu via llvm-extract
Config:	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
Local check:	reproduces at 04ca53e65f
Compiler Explorer:	not uploaded (over --godbolt-limit or disabled)

Snippet:

; Function Attrs: nounwind strictfp
define float @fcvt_s_wu(i32 %a) #0 {
  %1 = call float @llvm.experimental.constrained.uitofp.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.uitofp.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.uitofp.f32.i32: '  %1 = call float @llvm.experimental.constrained.uitofp.f32.i32(i32 %a, metadata !"round.dynamic", metadata !"fpexcept.strict")' (in function: fcvt_s_wu)
warning: Instruction selection used fallback path for fcvt_s_wu

Occurrences (46):

Input	Function	Config
float-convert-strict.ll	fcvt_s_wu	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-convert-strict.ll	fcvt_s_wu_load	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-convert-strict.ll	fcvt_s_wu_demanded_bits	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-convert-strict.ll	fcvt_s_wu	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-convert-strict.ll	fcvt_s_wu_load	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-convert-strict.ll	fcvt_s_wu_demanded_bits	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-convert-strict.ll	fcvt_s_wu	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.ll	fcvt_s_wu_load	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.ll	fcvt_s_wu_demanded_bits	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.ll	fcvt_s_wu	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-convert-strict.ll	fcvt_s_wu_load	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-convert-strict.ll	fcvt_s_wu_demanded_bits	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-convert-strict.ll	fcvt_s_wu	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-convert-strict.ll	fcvt_s_wu_load	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-convert-strict.ll	fcvt_s_wu_demanded_bits	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-convert-strict.ll	fcvt_s_wu	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.ll	fcvt_s_wu_load	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.ll	fcvt_s_wu_demanded_bits	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.ll	uitofp_aext_i32_to_f32	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.ll	uitofp_sext_i32_to_f32	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.ll	uitofp_zext_i32_to_f32	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.ll	uitofp_aext_i32_to_f32	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.ll	uitofp_sext_i32_to_f32	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.ll	uitofp_zext_i32_to_f32	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.405bac1c04.ll (mutant of float-convert-strict.ll)	fcvt_s_wu_load	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-convert-strict.57152036d0.ll (mutant of float-convert-strict.ll)	fcvt_s_wu_load	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-convert-strict.685257ec2c.ll (mutant of float-convert-strict.ll)	fcvt_s_wu_load	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-convert-strict.6cfbc78be6.ll (mutant of float-convert-strict.ll)	fcvt_s_wu_load	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-convert-strict.7a6a53b16e.ll (mutant of float-convert-strict.ll)	fcvt_s_wu_load	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.8b85add6aa.ll (mutant of float-convert-strict.ll)	fcvt_s_wu_load	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.9c4dcd575d.ll (mutant of float-convert-strict.ll)	fcvt_s_wu_load	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.a5231b48da.ll (mutant of float-convert-strict.ll)	fcvt_s_wu_load	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-convert-strict.b2274cfe9a.ll (mutant of float-convert-strict.ll)	fcvt_s_wu_load	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-convert-strict.d4e7fcbc6a.ll (mutant of float-convert-strict.ll)	fcvt_s_wu_load	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.eec449b74a.ll (mutant of float-convert-strict.ll)	fcvt_s_wu_load	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-convert-strict.fa8e5f65ea.ll (mutant of float-convert-strict.ll)	fcvt_s_wu_load	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
rv64f-float-convert-strict.10408038bb.ll (mutant of rv64f-float-convert-strict.ll)	uitofp_zext_i32_to_f32	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.3647adcfeb.ll (mutant of rv64f-float-convert-strict.ll)	uitofp_aext_i32_to_f32	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.3e3a44de38.ll (mutant of rv64f-float-convert-strict.ll)	uitofp_zext_i32_to_f32	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.61a4defe3e.ll (mutant of rv64f-float-convert-strict.ll)	uitofp_aext_i32_to_f32	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.7c660c0ab6.ll (mutant of rv64f-float-convert-strict.ll)	uitofp_aext_i32_to_f32	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.a210370883.ll (mutant of rv64f-float-convert-strict.ll)	uitofp_sext_i32_to_f32	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.a210370883.ll (mutant of rv64f-float-convert-strict.ll)	uitofp_zext_i32_to_f32	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.d2b0a92e1a.ll (mutant of rv64f-float-convert-strict.ll)	uitofp_sext_i32_to_f32	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.d2b0a92e1a.ll (mutant of rv64f-float-convert-strict.ll)	uitofp_zext_i32_to_f32	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.e6b9e6692d.ll (mutant of rv64f-float-convert-strict.ll)	uitofp_aext_i32_to_f32	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation`

Generated 2026-10-15 08:05 UTC.