fallback: legalize: G_FPTOUI

fallback: legalize: G_FPTOUI_SAT s64

Run:	explore-bc8218b282-20261015-075519
Kind:	fallback
Category:	legalize: G_FPTOUI_SAT s64
Occurrences:	46 in 6 configs, 2 test files
Snippet from:	double-convert.ll @fcvt_lu_d_sat via llvm-extract
Config:	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d`
Local check:	reproduces at bc8218b282
Compiler Explorer:	not uploaded (over --godbolt-limit or disabled)

Snippet:

; Function Attrs: nounwind
define i64 @fcvt_lu_d_sat(double %a) #0 {
start:
  %0 = tail call i64 @llvm.fptoui.sat.i64.f64(double %a)
  ret i64 %0
}

; Function Attrs: nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.fptoui.sat.i64.f64(double) #1

attributes #0 = { nounwind }
attributes #1 = { nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none) }

Reproduce:

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

Local llc output:

remark: <unknown>:0:0: unable to legalize instruction: %1:_(s64) = G_FPTOUI_SAT %0:_(s64) (in function: fcvt_lu_d_sat)
warning: Instruction selection used fallback path for fcvt_lu_d_sat

Occurrences (46):

Input	Function	Config
double-convert.ll	fcvt_lu_d_sat	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d`
double-convert.ll	fcvt_lu_d_sat	`-mtriple=riscv32 -verify-machineinstrs`
double-convert.ll	fcvt_lu_d_sat	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d`
double-convert.ll	fcvt_lu_d_sat	`-mtriple=riscv64 -verify-machineinstrs`
double-round-conv-sat.ll	test_floor_ui64	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d`
double-round-conv-sat.ll	test_ceil_ui64	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d`
double-round-conv-sat.ll	test_trunc_ui64	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d`
double-round-conv-sat.ll	test_round_ui64	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d`
double-round-conv-sat.ll	test_roundeven_ui64	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d`
double-round-conv-sat.ll	test_rint_ui64	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d`
double-round-conv-sat.ll	test_floor_ui64	`-mtriple=riscv32 -mattr=+zdinx -verify-machineinstrs -target-abi=ilp32`
double-round-conv-sat.ll	test_ceil_ui64	`-mtriple=riscv32 -mattr=+zdinx -verify-machineinstrs -target-abi=ilp32`
double-round-conv-sat.ll	test_trunc_ui64	`-mtriple=riscv32 -mattr=+zdinx -verify-machineinstrs -target-abi=ilp32`
double-round-conv-sat.ll	test_round_ui64	`-mtriple=riscv32 -mattr=+zdinx -verify-machineinstrs -target-abi=ilp32`
double-round-conv-sat.ll	test_roundeven_ui64	`-mtriple=riscv32 -mattr=+zdinx -verify-machineinstrs -target-abi=ilp32`
double-round-conv-sat.ll	test_rint_ui64	`-mtriple=riscv32 -mattr=+zdinx -verify-machineinstrs -target-abi=ilp32`
double-round-conv-sat.ll	test_floor_ui64	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d`
double-round-conv-sat.ll	test_ceil_ui64	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d`
double-round-conv-sat.ll	test_trunc_ui64	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d`
double-round-conv-sat.ll	test_round_ui64	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d`
double-round-conv-sat.ll	test_roundeven_ui64	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d`
double-round-conv-sat.ll	test_rint_ui64	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d`
double-round-conv-sat.ll	test_floor_ui64	`-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64`
double-round-conv-sat.ll	test_ceil_ui64	`-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64`
double-round-conv-sat.ll	test_trunc_ui64	`-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64`
double-round-conv-sat.ll	test_round_ui64	`-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64`
double-round-conv-sat.ll	test_roundeven_ui64	`-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64`
double-round-conv-sat.ll	test_rint_ui64	`-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64`
double-convert.2d5a1c89b2.ll (mutant of double-convert.ll)	fcvt_lu_d_sat	`-mtriple=riscv32 -mattr=+zdinx -verify-machineinstrs -target-abi=ilp32`
double-convert.37f02b0b99.ll (mutant of double-convert.ll)	fcvt_lu_d_sat	`-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64`
double-convert.785cd00a30.ll (mutant of double-convert.ll)	fcvt_lu_d_sat	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d`
double-convert.b8a938abcb.ll (mutant of double-convert.ll)	fcvt_lu_d_sat	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d`
double-convert.ce9cdd2bf2.ll (mutant of double-convert.ll)	fcvt_lu_d_sat	`-mtriple=riscv64 -verify-machineinstrs`
double-convert.f66f9b5066.ll (mutant of double-convert.ll)	fcvt_lu_d_sat	`-mtriple=riscv32 -verify-machineinstrs`
double-round-conv-sat.0b95dbe658.ll (mutant of double-round-conv-sat.ll)	test_roundeven_ui64	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d`
double-round-conv-sat.0b95dbe658.ll (mutant of double-round-conv-sat.ll)	test_rint_ui64	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d`
double-round-conv-sat.25ba3a6b18.ll (mutant of double-round-conv-sat.ll)	test_roundeven_ui64	`-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64`
double-round-conv-sat.25ba3a6b18.ll (mutant of double-round-conv-sat.ll)	test_rint_ui64	`-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64`
double-round-conv-sat.3541dd5881.ll (mutant of double-round-conv-sat.ll)	test_roundeven_ui64	`-mtriple=riscv32 -mattr=+zdinx -verify-machineinstrs -target-abi=ilp32`
double-round-conv-sat.3541dd5881.ll (mutant of double-round-conv-sat.ll)	test_rint_ui64	`-mtriple=riscv32 -mattr=+zdinx -verify-machineinstrs -target-abi=ilp32`
double-round-conv-sat.5350200fd8.ll (mutant of double-round-conv-sat.ll)	test_roundeven_ui64	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d`
double-round-conv-sat.5350200fd8.ll (mutant of double-round-conv-sat.ll)	test_rint_ui64	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d`
double-round-conv-sat.576fafa14b.ll (mutant of double-round-conv-sat.ll)	test_round_ui64	`-mtriple=riscv32 -mattr=+zdinx -verify-machineinstrs -target-abi=ilp32`
double-round-conv-sat.7818ec2806.ll (mutant of double-round-conv-sat.ll)	test_round_ui64	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d`
double-round-conv-sat.e72797be09.ll (mutant of double-round-conv-sat.ll)	test_round_ui64	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d`
double-round-conv-sat.fac4606502.ll (mutant of double-round-conv-sat.ll)	test_round_ui64	`-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -target-abi=lp64`

Generated 2026-10-15 08:05 UTC.