fallback: legalize: G_FPTRUNC s16,s32

Run:explore-bc8218b282-20261015-075519
Kind:fallback
Category:legalize: G_FPTRUNC s16,s32
Occurrences:95 in 35 configs, 8 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 bc8218b282
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 (95) (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.01dc5e7774.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.0b84fabf3d.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv32 -verify-machineinstrs -mattr=+zdinx -target-abi ilp32
copysign-casts.23e2eafc2a.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv32 -verify-machineinstrs
copysign-casts.51b660426a.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv64 -verify-machineinstrs -mattr=+zdinx -target-abi lp64
copysign-casts.9c134fcfd8.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+zfhmin -target-abi ilp32f
copysign-casts.c69d454b72.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv64 -verify-machineinstrs -mattr=+f -mattr=+d -target-abi lp64d
copysign-casts.d1e6100d62.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv64 -verify-machineinstrs
copysign-casts.d7b5769fa3.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.d9543c4bea.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv32 -verify-machineinstrs -mattr=+f -target-abi ilp32f
copysign-casts.ff44011ee7.ll (mutant of copysign-casts.ll)fold_demote_h_s-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+d -target-abi ilp32d
half-br-fcmp.958dc3eafa.ll (mutant of half-br-fcmp.ll)br_fcmp_une-mtriple=riscv64 -mattr=+zfhmin -verify-machineinstrs -target-abi lp64f
half-br-fcmp.e5767f70dd.ll (mutant of half-br-fcmp.ll)br_fcmp_une-mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f
half-convert.74e9fb3dc3.ll (mutant of half-convert.ll)fcvt_h_s-mtriple=riscv64 -verify-machineinstrs
half-convert.7852c5fc11.ll (mutant of half-convert.ll)fcvt_h_s-mtriple=riscv64 -mattr=+zfhmin -verify-machineinstrs -target-abi lp64f
half-convert.bfc9c68c65.ll (mutant of half-convert.ll)fcvt_h_s-mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f
half-convert.c8b424971c.ll (mutant of half-convert.ll)fcvt_h_s-mtriple=riscv64 -mattr=+d -target-abi=lp64d -verify-machineinstrs
half-convert.e08b63e20a.ll (mutant of half-convert.ll)fcvt_h_s-mtriple=riscv64 -mattr=+d,+zfhmin -verify-machineinstrs -target-abi lp64d
half-convert.e4b1fc1581.ll (mutant of half-convert.ll)fcvt_h_s-mtriple=riscv64 -mattr=+d -target-abi=lp64 -verify-machineinstrs
half-convert.e991b4435a.ll (mutant of half-convert.ll)fcvt_h_s-mtriple=riscv32 -mattr=+d,+zfhmin -verify-machineinstrs -target-abi ilp32d
half-convert.ea58524f0c.ll (mutant of half-convert.ll)fcvt_h_s-mtriple=riscv32 -verify-machineinstrs
half-convert.f73dec96ee.ll (mutant of half-convert.ll)fcvt_h_s-mtriple=riscv32 -mattr=+d -target-abi=ilp32d -verify-machineinstrs
half-convert.f7c317bb12.ll (mutant of half-convert.ll)fcvt_h_s-mtriple=riscv32 -mattr=+d -target-abi=ilp32 -verify-machineinstrs
half-frem.035b29ec96.ll (mutant of half-frem.ll)frem_f16-mtriple=riscv64 -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64
half-frem.038b17976b.ll (mutant of half-frem.ll)frem_f16-mtriple=riscv64 -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64
half-frem.1d3f821c7b.ll (mutant of half-frem.ll)frem_f16-mtriple=riscv32 -mattr=+zhinx -verify-machineinstrs -target-abi ilp32

Generated 2026-10-15 08:05 UTC.