fallback: legalize: G_FPTRUNC s16,s32

Run:main-04ca53e65f-20261014-105623
Kind:fallback
Category:legalize: G_FPTRUNC s16,s32
Occurrences:97 in 32 configs, 12 test files
Snippet from:half-frem.ll @frem_f16 via llvm-extract
Config:-mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f
Local check:reproduces at 04ca53e65f
Compiler Explorer:not uploaded (over --godbolt-limit or disabled)

Snippet:

; Function Attrs: nounwind
define half @frem_f16(half %a, half %b) #0 {
  %1 = frem half %a, %b
  ret half %1
}

attributes #0 = { nounwind }

Reproduce:

llc -mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to legalize instruction: %2:_(s16) = G_FPTRUNC %5:_(s32) (in function: frem_f16)
warning: Instruction selection used fallback path for frem_f16

Occurrences (97) (first 50):

InputFunctionConfig
copysign-casts.llfold_demote_h_s-mtriple=riscv32 -verify-machineinstrs
copysign-casts.llfold_demote_h_s-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+d -mattr=+zfhmin -target-abi ilp32d
copysign-casts.llfold_demote_h_s-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+d -target-abi ilp32d
copysign-casts.llfold_demote_h_s-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+zfhmin -target-abi ilp32f
copysign-casts.llfold_demote_h_s-mtriple=riscv32 -verify-machineinstrs -mattr=+f -target-abi ilp32f
copysign-casts.llfold_demote_h_s-mtriple=riscv64 -verify-machineinstrs
copysign-casts.llfold_demote_h_s-mtriple=riscv64 -verify-machineinstrs -mattr=+f -mattr=+d -mattr=+zfhmin -target-abi lp64d
copysign-casts.llfold_demote_h_s-mtriple=riscv64 -verify-machineinstrs -mattr=+f -mattr=+d -target-abi lp64d
fp16-promote.lltest_fptrunc_float-mtriple=riscv32 -mattr +d -target-abi ilp32d
half-convert.llfcvt_h_s-mtriple=riscv32 -mattr=+d -target-abi=ilp32 -verify-machineinstrs
half-convert.llfcvt_h_s-mtriple=riscv32 -mattr=+d -target-abi=ilp32d -verify-machineinstrs
half-convert.llfcvt_h_s-mtriple=riscv32 -mattr=+d,+zfhmin -verify-machineinstrs -target-abi ilp32d
half-convert.llfcvt_h_s-mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f
half-convert.llfcvt_h_s-mtriple=riscv32 -verify-machineinstrs
half-convert.llfcvt_h_s-mtriple=riscv64 -mattr=+d -target-abi=lp64 -verify-machineinstrs
half-convert.llfcvt_h_s-mtriple=riscv64 -mattr=+d -target-abi=lp64d -verify-machineinstrs
half-convert.llfcvt_h_s-mtriple=riscv64 -mattr=+d,+zfhmin -verify-machineinstrs -target-abi lp64d
half-convert.llfcvt_h_s-mtriple=riscv64 -mattr=+zfhmin -verify-machineinstrs -target-abi lp64f
half-convert.llfcvt_h_s-mtriple=riscv64 -verify-machineinstrs
half-frem.llfrem_f16-mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f
half-frem.llfrem_f16-mtriple=riscv32 -mattr=+zhinx -verify-machineinstrs -target-abi ilp32
half-frem.llfrem_f16-mtriple=riscv32 -mattr=+zhinxmin -verify-machineinstrs -target-abi ilp32
half-frem.llfrem_f16-mtriple=riscv64 -mattr=+zfhmin -verify-machineinstrs -target-abi lp64f
half-frem.llfrem_f16-mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs -target-abi lp64
half-frem.llfrem_f16-mtriple=riscv64 -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64
copysign-casts.0342ac8d3d.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+d -target-abi ilp32d
copysign-casts.052ce00f93.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv64 -verify-machineinstrs
copysign-casts.0e07abf6ce.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv64 -verify-machineinstrs -mattr=+f -mattr=+d -mattr=+zfhmin -target-abi lp64d
copysign-casts.2643b945d7.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv32 -verify-machineinstrs -mattr=+f -target-abi ilp32f
copysign-casts.3f56b89e76.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv32 -verify-machineinstrs
copysign-casts.568f9dc1af.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv64 -verify-machineinstrs
copysign-casts.5d0ae1aaac.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv64 -verify-machineinstrs -mattr=+f -mattr=+d -target-abi lp64d
copysign-casts.9acfbd29e0.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+d -mattr=+zfhmin -target-abi ilp32d
copysign-casts.ab40e62ab0.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv64 -verify-machineinstrs -mattr=+f -mattr=+d -target-abi lp64d
copysign-casts.b5dce468c2.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+zfhmin -target-abi ilp32f
copysign-casts.bc19fc459f.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv32 -verify-machineinstrs -mattr=+f -target-abi ilp32f
copysign-casts.c5b3dae52c.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+d -mattr=+zfhmin -target-abi ilp32d
copysign-casts.cb7c4ede34.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv32 -verify-machineinstrs
copysign-casts.cef060138a.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+zfhmin -target-abi ilp32f
copysign-casts.db0006a952.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+d -target-abi ilp32d
copysign-casts.fbbafa78f9.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv64 -verify-machineinstrs -mattr=+f -mattr=+d -mattr=+zfhmin -target-abi lp64d
fastcc-without-f-reg.1323f21abe.ll (mutant of fastcc-without-f-reg.ll)caller_half_32-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs
fastcc-without-f-reg.1fe7f1c401.ll (mutant of fastcc-without-f-reg.ll)caller_half_32-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs
fastcc-without-f-reg.42279d595a.ll (mutant of fastcc-without-f-reg.ll)caller_half_32-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs
fastcc-without-f-reg.98a7a8458c.ll (mutant of fastcc-without-f-reg.ll)caller_half_32-mtriple=riscv32 -mattr=+zhinx -verify-machineinstrs
fastcc-without-f-reg.c68168cc81.ll (mutant of fastcc-without-f-reg.ll)caller_half_32-mtriple=riscv32 -mattr=+zdinx -verify-machineinstrs
fastcc-without-f-reg.e8d82f907c.ll (mutant of fastcc-without-f-reg.ll)caller_half_32-mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs
fp16-promote.aab59a4083.ll (mutant of fp16-promote.ll)test_fptrunc_float-mtriple=riscv32 -mattr +d -target-abi ilp32d
half-frem.142196b8b6.ll (mutant of half-frem.ll)frem_f16-mtriple=riscv64 -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64
half-frem.163a3255c1.ll (mutant of half-frem.ll)frem_f16-mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f

Generated 2026-10-15 08:05 UTC.