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

Run:	explore-04ca53e65f-20261014-114124
Kind:	fallback
Category:	translate: call llvm.experimental.constrained.fptoui.i32.f32
Occurrences:	30 in 9 configs, 3 test files
Snippet from:	float-convert-strict.ll @fcvt_wu_s 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 i32 @fcvt_wu_s(float %a) #0 {
  %1 = call i32 @llvm.experimental.constrained.fptoui.i32.f32(float %a, metadata !"fpexcept.strict")
  ret i32 %1
}

; Function Attrs: nocallback nofree nosync nounwind strictfp willreturn memory(inaccessiblemem: readwrite)
declare i32 @llvm.experimental.constrained.fptoui.i32.f32(float, 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.fptoui.i32.f32: '  %1 = call i32 @llvm.experimental.constrained.fptoui.i32.f32(float %a, metadata !"fpexcept.strict")' (in function: fcvt_wu_s)
warning: Instruction selection used fallback path for fcvt_wu_s

Occurrences (30):

Input	Function	Config
float-convert-strict.ll	fcvt_wu_s	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-convert-strict.ll	fcvt_wu_s_multiple_use	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
float-convert-strict.ll	fcvt_wu_s	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-convert-strict.ll	fcvt_wu_s_multiple_use	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-convert-strict.ll	fcvt_wu_s	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.ll	fcvt_wu_s_multiple_use	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.ll	fcvt_wu_s	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-convert-strict.ll	fcvt_wu_s_multiple_use	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-convert-strict.ll	fcvt_wu_s	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-convert-strict.ll	fcvt_wu_s_multiple_use	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-convert-strict.ll	fcvt_wu_s	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.ll	fcvt_wu_s_multiple_use	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.ll	aext_fptoui	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.ll	sext_fptoui	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.ll	zext_fptoui	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.ll	aext_fptoui	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.ll	sext_fptoui	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.ll	zext_fptoui	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64i-single-softfloat.ll	strict_fp32_to_ui32	`-mtriple=riscv64 -verify-machineinstrs`
float-convert-strict.19d12dab4b.ll (mutant of float-convert-strict.ll)	fcvt_wu_s	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.6f9b8e3d27.ll (mutant of float-convert-strict.ll)	fcvt_wu_s	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
float-convert-strict.8f1b573add.ll (mutant of float-convert-strict.ll)	fcvt_wu_s	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
float-convert-strict.9e37b1cd2f.ll (mutant of float-convert-strict.ll)	fcvt_wu_s	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64f`
float-convert-strict.b31cde2c97.ll (mutant of float-convert-strict.ll)	fcvt_wu_s	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
float-convert-strict.ff4cd4c027.ll (mutant of float-convert-strict.ll)	fcvt_wu_s	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32f`
rv64f-float-convert-strict.1552fb846f.ll (mutant of rv64f-float-convert-strict.ll)	sext_fptoui	`-mtriple=riscv64 -mattr=+zfinx -target-abi=lp64 -verify-machineinstrs -disable-strictnode-mutation`
rv64f-float-convert-strict.be7f256420.ll (mutant of rv64f-float-convert-strict.ll)	sext_fptoui	`-mtriple=riscv64 -mattr=+f -target-abi=lp64f -verify-machineinstrs -disable-strictnode-mutation`
rv64i-single-softfloat.2ead25e3d0.ll (mutant of rv64i-single-softfloat.ll)	strict_fp32_to_ui32	`-mtriple=riscv64 -verify-machineinstrs`
rv64i-single-softfloat.5a3761e1b0.ll (mutant of rv64i-single-softfloat.ll)	strict_fp32_to_ui32	`-mtriple=riscv64 -verify-machineinstrs`
rv64i-single-softfloat.b7a73fd641.ll (mutant of rv64i-single-softfloat.ll)	strict_fp32_to_ui32	`-mtriple=riscv64 -verify-machineinstrs`

Generated 2026-10-15 08:05 UTC.