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

Run:	main-04ca53e65f-20261014-113325
Kind:	fallback
Category:	translate: call llvm.experimental.constrained.sitofp.f32.i32
Occurrences:	32 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 04ca53e65f
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 (32):

Input	Function	Config
float-convert-strict.ll	fcvt_s_w	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-convert-strict.ll	fcvt_s_w_load	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-convert-strict.ll	fcvt_s_w_demanded_bits	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-convert-strict.ll	fcvt_s_w	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-convert-strict.ll	fcvt_s_w_load	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-convert-strict.ll	fcvt_s_w_demanded_bits	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-convert-strict.ll	fcvt_s_w	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.ll	fcvt_s_w_load	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.ll	fcvt_s_w_demanded_bits	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.ll	fcvt_s_w	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-convert-strict.ll	fcvt_s_w_load	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-convert-strict.ll	fcvt_s_w_demanded_bits	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-convert-strict.ll	fcvt_s_w	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-convert-strict.ll	fcvt_s_w_load	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-convert-strict.ll	fcvt_s_w_demanded_bits	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-convert-strict.ll	fcvt_s_w	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.ll	fcvt_s_w_load	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.ll	fcvt_s_w_demanded_bits	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
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.ll	sitofp_sext_i32_to_f32	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation`
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.ll	sitofp_aext_i32_to_f32	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.ll	sitofp_sext_i32_to_f32	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.ll	sitofp_zext_i32_to_f32	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.0698db6066.ll (mutant of float-convert-strict.ll)	fcvt_s_w_demanded_bits	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.5f2750a10e.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.64e4f776e6.ll (mutant of float-convert-strict.ll)	fcvt_s_w_demanded_bits	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.801eeb131c.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.a8e56acd38.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.d27543ff5b.ll (mutant of float-convert-strict.ll)	fcvt_s_w_demanded_bits	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
rv64f-float-convert-strict.3350b5c38a.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.869fb5df36.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`

Generated 2026-10-15 08:05 UTC.