fallback: translate: call llvm.experimental.constrained.sitofp.f32.i128

Run:	main-bc8218b282-20261015-074651
Kind:	fallback
Category:	translate: call llvm.experimental.constrained.sitofp.f32.i128
Occurrences:	18 in 3 configs, 1 test files
Snippet from:	rv64-float-convert-strict.ll @sitofp_i128_to_f32 via llvm-extract
Config:	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation`
Local check:	reproduces at bc8218b282
Compiler Explorer:	not uploaded (over --godbolt-limit or disabled)

Snippet:

; Function Attrs: nounwind strictfp
define float @sitofp_i128_to_f32(i128 %a) #0 {
  %1 = call float @llvm.experimental.constrained.sitofp.f32.i128(i128 %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.i128(i128, metadata, metadata) #1

attributes #0 = { nounwind strictfp }
attributes #1 = { nocallback nofree nosync nounwind strictfp willreturn memory(inaccessiblemem: readwrite) }

Reproduce:

llc -mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to translate instruction: call llvm.experimental.constrained.sitofp.f32.i128: '  %1 = call float @llvm.experimental.constrained.sitofp.f32.i128(i128 %a, metadata !"round.dynamic", metadata !"fpexcept.strict")' (in function: sitofp_i128_to_f32)
warning: Instruction selection used fallback path for sitofp_i128_to_f32

Occurrences (18):

Input	Function	Config
rv64-float-convert-strict.ll	sitofp_i128_to_f32	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation`
rv64-float-convert-strict.ll	sitofp_i128_to_f32	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64-float-convert-strict.ll	sitofp_i128_to_f32	`-mtriple=riscv64 -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64-float-convert-strict.086fe34014.ll (mutant of rv64-float-convert-strict.ll)	sitofp_i128_to_f32	`-mtriple=riscv64 -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64-float-convert-strict.15d1c2b0d9.ll (mutant of rv64-float-convert-strict.ll)	sitofp_i128_to_f32	`-mtriple=riscv64 -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64-float-convert-strict.26e3486a67.ll (mutant of rv64-float-convert-strict.ll)	sitofp_i128_to_f32	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation`
rv64-float-convert-strict.2d8b111afe.ll (mutant of rv64-float-convert-strict.ll)	sitofp_i128_to_f32	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64-float-convert-strict.2ef6832528.ll (mutant of rv64-float-convert-strict.ll)	sitofp_i128_to_f32	`-mtriple=riscv64 -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64-float-convert-strict.40be4a9a9c.ll (mutant of rv64-float-convert-strict.ll)	sitofp_i128_to_f32	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation`
rv64-float-convert-strict.456bd5ff75.ll (mutant of rv64-float-convert-strict.ll)	sitofp_i128_to_f32	`-mtriple=riscv64 -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64-float-convert-strict.77074fcb30.ll (mutant of rv64-float-convert-strict.ll)	sitofp_i128_to_f32	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation`
rv64-float-convert-strict.94471d542f.ll (mutant of rv64-float-convert-strict.ll)	sitofp_i128_to_f32	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64-float-convert-strict.a2356252d2.ll (mutant of rv64-float-convert-strict.ll)	sitofp_i128_to_f32	`-mtriple=riscv64 -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64-float-convert-strict.b8e93296b3.ll (mutant of rv64-float-convert-strict.ll)	sitofp_i128_to_f32	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation`
rv64-float-convert-strict.c58dbb9373.ll (mutant of rv64-float-convert-strict.ll)	sitofp_i128_to_f32	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64-float-convert-strict.cf4024eb8e.ll (mutant of rv64-float-convert-strict.ll)	sitofp_i128_to_f32	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64-float-convert-strict.d6911e7ce0.ll (mutant of rv64-float-convert-strict.ll)	sitofp_i128_to_f32	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation`
rv64-float-convert-strict.e9218b26df.ll (mutant of rv64-float-convert-strict.ll)	sitofp_i128_to_f32	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`

Generated 2026-10-15 08:05 UTC.