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

Run:	explore-bc8218b282-20261015-075519
Kind:	fallback
Category:	translate: call llvm.experimental.constrained.uitofp.f32.i32
Occurrences:	50 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 bc8218b282
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 (50):

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.00835023f0.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.011524de49.ll (mutant of float-convert-strict.ll)	fcvt_s_wu_load	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.086a70ddce.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.11259c7ef1.ll (mutant of float-convert-strict.ll)	fcvt_s_wu_load	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.1377a1797a.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.24b7b3c405.ll (mutant of float-convert-strict.ll)	fcvt_s_wu	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.3927626499.ll (mutant of float-convert-strict.ll)	fcvt_s_wu	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-convert-strict.553fb29b5e.ll (mutant of float-convert-strict.ll)	fcvt_s_wu	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-convert-strict.55ed6a56aa.ll (mutant of float-convert-strict.ll)	fcvt_s_wu	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-convert-strict.5886a7cb33.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.59bd813595.ll (mutant of float-convert-strict.ll)	fcvt_s_wu	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.874058274f.ll (mutant of float-convert-strict.ll)	fcvt_s_wu	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-convert-strict.bbfab6b4cb.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.ca0a0056de.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.d28cc6ee2e.ll (mutant of float-convert-strict.ll)	fcvt_s_wu_load	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.db93db564e.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.e7d27087c2.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.f6cf66dbf8.ll (mutant of float-convert-strict.ll)	fcvt_s_wu_load	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.1bf93c590d.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.4c269e57ac.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.d1258ec303.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.d5a5ba2c19.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.e149eae132.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.e149eae132.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.feefe1e29f.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.feefe1e29f.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`

Generated 2026-10-15 08:05 UTC.