fallback: legalize: G_FCANONICALIZE s16

Run:explore-04ca53e65f-20261014-114124
Kind:fallback
Category:legalize: G_FCANONICALIZE s16
Occurrences:18 in 9 configs, 1 test files
Snippet from:fp-fcanonicalize.ll @fcanonicalize_f16 via llvm-extract
Config:--mtriple=riscv32
Local check:reproduces at 04ca53e65f
Compiler Explorer:not uploaded (over --godbolt-limit or disabled)

Snippet:

define half @fcanonicalize_f16(half %x) {
  %z = call nnan half @llvm.canonicalize.f16(half %x)
  ret half %z
}

; Function Attrs: nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none)
declare half @llvm.canonicalize.f16(half) #0

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

Reproduce:

llc --mtriple=riscv32 -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc --mtriple=riscv32 -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to legalize instruction: %2:_(s16) = nnan G_FCANONICALIZE %0:_ (in function: fcanonicalize_f16)
warning: Instruction selection used fallback path for fcanonicalize_f16

Occurrences (18):

InputFunctionConfig
fp-fcanonicalize.llfcanonicalize_f16--mtriple=riscv32
fp-fcanonicalize.llfcanonicalize_f16--mtriple=riscv32 --mattr=+d,-zfh
fp-fcanonicalize.llfcanonicalize_f16--mtriple=riscv64
fp-fcanonicalize.llfcanonicalize_f16--mtriple=riscv64 --mattr=+d,-zfh
fp-fcanonicalize.llfcanonicalize_f16-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs
fp-fcanonicalize.llfcanonicalize_f16-mtriple=riscv32 -mattr=+zhinx -target-abi=ilp32 -verify-machineinstrs
fp-fcanonicalize.llfcanonicalize_f16-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs
fp-fcanonicalize.llfcanonicalize_f16-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs
fp-fcanonicalize.llfcanonicalize_f16-mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs
fp-fcanonicalize.10fde4759c.ll (mutant of fp-fcanonicalize.ll)fcanonicalize_f16--mtriple=riscv64
fp-fcanonicalize.171a5d2505.ll (mutant of fp-fcanonicalize.ll)fcanonicalize_f16-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs
fp-fcanonicalize.398c70cfff.ll (mutant of fp-fcanonicalize.ll)fcanonicalize_f16-mtriple=riscv32 -mattr=+zhinx -target-abi=ilp32 -verify-machineinstrs
fp-fcanonicalize.492a59932f.ll (mutant of fp-fcanonicalize.ll)fcanonicalize_f16-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs
fp-fcanonicalize.57171eee79.ll (mutant of fp-fcanonicalize.ll)fcanonicalize_f16-mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs
fp-fcanonicalize.9ca96d28ce.ll (mutant of fp-fcanonicalize.ll)fcanonicalize_f16--mtriple=riscv64 --mattr=+d,-zfh
fp-fcanonicalize.a0fbfc1938.ll (mutant of fp-fcanonicalize.ll)fcanonicalize_f16--mtriple=riscv32 --mattr=+d,-zfh
fp-fcanonicalize.aba614f4c6.ll (mutant of fp-fcanonicalize.ll)fcanonicalize_f16-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs
fp-fcanonicalize.b8cbd7b285.ll (mutant of fp-fcanonicalize.ll)fcanonicalize_f16--mtriple=riscv32

Generated 2026-10-15 08:05 UTC.