fallback: translate: call llvm.experimental.constrained.fptosi.i32.f64

Run:	explore-04ca53e65f-20261014-114124
Kind:	fallback
Category:	translate: call llvm.experimental.constrained.fptosi.i32.f64
Occurrences:	24 in 10 configs, 3 test files
Snippet from:	double-convert-strict.ll @fcvt_w_d via llvm-extract
Config:	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32d`
Local check:	reproduces at 04ca53e65f
Compiler Explorer:	not uploaded (over --godbolt-limit or disabled)

Snippet:

; Function Attrs: nounwind strictfp
define i32 @fcvt_w_d(double %a) #0 {
  %1 = call i32 @llvm.experimental.constrained.fptosi.i32.f64(double %a, metadata !"fpexcept.strict")
  ret i32 %1
}

; Function Attrs: nocallback nofree nosync nounwind strictfp willreturn memory(inaccessiblemem: readwrite)
declare i32 @llvm.experimental.constrained.fptosi.i32.f64(double, metadata) #1

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

Reproduce:

llc -mtriple=riscv32 -mattr=+d -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32d -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -mattr=+d -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32d -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to translate instruction: call llvm.experimental.constrained.fptosi.i32.f64: '  %1 = call i32 @llvm.experimental.constrained.fptosi.i32.f64(double %a, metadata !"fpexcept.strict")' (in function: fcvt_w_d)
warning: Instruction selection used fallback path for fcvt_w_d

Occurrences (24):

Input	Function	Config
double-convert-strict.ll	fcvt_w_d	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32d`
double-convert-strict.ll	fcvt_w_d	`-mtriple=riscv32 -mattr=+zdinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=ilp32`
double-convert-strict.ll	fcvt_w_d	`-mtriple=riscv32 -verify-machineinstrs -disable-strictnode-mutation`
double-convert-strict.ll	fcvt_w_d	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64d`
double-convert-strict.ll	fcvt_w_d	`-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -disable-strictnode-mutation -target-abi=lp64`
double-convert-strict.ll	fcvt_w_d	`-mtriple=riscv64 -verify-machineinstrs -disable-strictnode-mutation`
rv64d-double-convert-strict.ll	aext_fptosi	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d -disable-strictnode-mutation`
rv64d-double-convert-strict.ll	sext_fptosi	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d -disable-strictnode-mutation`
rv64d-double-convert-strict.ll	zext_fptosi	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d -disable-strictnode-mutation`
rv64d-double-convert-strict.ll	aext_fptosi	`-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64 -disable-strictnode-mutation`
rv64d-double-convert-strict.ll	sext_fptosi	`-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64 -disable-strictnode-mutation`
rv64d-double-convert-strict.ll	zext_fptosi	`-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64 -disable-strictnode-mutation`
rv64i-double-softfloat.ll	strict_fp64_to_si32	`-mtriple=riscv64 -mattr=+f -target-abi lp64f -verify-machineinstrs`
rv64i-double-softfloat.ll	strict_fp64_to_si32	`-mtriple=riscv64 -verify-machineinstrs`
rv64d-double-convert-strict.561576e1e9.ll (mutant of rv64d-double-convert-strict.ll)	sext_fptosi	`-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64 -disable-strictnode-mutation`
rv64d-double-convert-strict.6b1e2d0edc.ll (mutant of rv64d-double-convert-strict.ll)	aext_fptosi	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d -disable-strictnode-mutation`
rv64d-double-convert-strict.6d8af099f6.ll (mutant of rv64d-double-convert-strict.ll)	aext_fptosi	`-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64 -disable-strictnode-mutation`
rv64d-double-convert-strict.894127f72f.ll (mutant of rv64d-double-convert-strict.ll)	sext_fptosi	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d -disable-strictnode-mutation`
rv64i-double-softfloat.78a58f7d4f.ll (mutant of rv64i-double-softfloat.ll)	strict_fp64_to_si32	`-mtriple=riscv64 -verify-machineinstrs`
rv64i-double-softfloat.910d5b42a6.ll (mutant of rv64i-double-softfloat.ll)	strict_fp64_to_si32	`-mtriple=riscv64 -mattr=+f -target-abi lp64f -verify-machineinstrs`
rv64i-double-softfloat.a77ae2cf59.ll (mutant of rv64i-double-softfloat.ll)	strict_fp64_to_si32	`-mtriple=riscv64 -verify-machineinstrs`
rv64i-double-softfloat.c413da8f2e.ll (mutant of rv64i-double-softfloat.ll)	strict_fp64_to_si32	`-mtriple=riscv64 -mattr=+f -target-abi lp64f -verify-machineinstrs`
rv64i-double-softfloat.c91c499f8a.ll (mutant of rv64i-double-softfloat.ll)	strict_fp64_to_si32	`-mtriple=riscv64 -verify-machineinstrs`
rv64i-double-softfloat.d1cfaf1adf.ll (mutant of rv64i-double-softfloat.ll)	strict_fp64_to_si32	`-mtriple=riscv64 -mattr=+f -target-abi lp64f -verify-machineinstrs`

Generated 2026-10-15 08:05 UTC.