fallback: legalize: G_FPTRUNC s16,s64

Run:main-bc8218b282-20261015-074651
Kind:fallback
Category:legalize: G_FPTRUNC s16,s64
Occurrences:50 in 20 configs, 3 test files
Snippet from:half-convert.ll @fcvt_h_d via llvm-extract
Config:-mtriple=riscv32 -mattr=+d -target-abi=ilp32 -verify-machineinstrs
Local check:reproduces at bc8218b282
Compiler Explorer:not uploaded (over --godbolt-limit or disabled)

Snippet:

; Function Attrs: nounwind
define half @fcvt_h_d(double %a) #0 {
  %1 = fptrunc double %a to half
  ret half %1
}

attributes #0 = { nounwind }

Reproduce:

llc -mtriple=riscv32 -mattr=+d -target-abi=ilp32 -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -mattr=+d -target-abi=ilp32 -verify-machineinstrs -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to legalize instruction: %3:_(s16) = G_FPTRUNC %0:_(s64) (in function: fcvt_h_d)
warning: Instruction selection used fallback path for fcvt_h_d

Occurrences (50):

InputFunctionConfig
copysign-casts.llfold_demote_h_d-mtriple=riscv32 -verify-machineinstrs
copysign-casts.llfold_demote_h_d-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+d -mattr=+zfhmin -target-abi ilp32d
copysign-casts.llfold_demote_h_d-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+d -target-abi ilp32d
copysign-casts.llfold_demote_h_d-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+zfh -target-abi ilp32f
copysign-casts.llfold_demote_h_d-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+zfhmin -target-abi ilp32f
copysign-casts.llfold_demote_h_d-mtriple=riscv32 -verify-machineinstrs -mattr=+f -target-abi ilp32f
copysign-casts.llfold_demote_h_d-mtriple=riscv64 -verify-machineinstrs
copysign-casts.llfold_demote_h_d-mtriple=riscv64 -verify-machineinstrs -mattr=+f -mattr=+d -mattr=+zfhmin -target-abi lp64d
copysign-casts.llfold_demote_h_d-mtriple=riscv64 -verify-machineinstrs -mattr=+f -mattr=+d -target-abi lp64d
fp16-promote.lltest_fptrunc_double-mtriple=riscv32 -mattr +d -target-abi ilp32d
half-convert.llfcvt_h_d-mtriple=riscv32 -mattr=+d -target-abi=ilp32 -verify-machineinstrs
half-convert.llfcvt_h_d-mtriple=riscv32 -mattr=+d -target-abi=ilp32d -verify-machineinstrs
half-convert.llfcvt_h_d-mtriple=riscv32 -mattr=+d,+zfhmin -verify-machineinstrs -target-abi ilp32d
half-convert.llfcvt_h_d-mtriple=riscv32 -mattr=+zfh -verify-machineinstrs -target-abi ilp32f
half-convert.llfcvt_h_d-mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f
half-convert.llfcvt_h_d-mtriple=riscv32 -verify-machineinstrs
half-convert.llfcvt_h_d-mtriple=riscv64 -mattr=+d -target-abi=lp64 -verify-machineinstrs
half-convert.llfcvt_h_d-mtriple=riscv64 -mattr=+d -target-abi=lp64d -verify-machineinstrs
half-convert.llfcvt_h_d-mtriple=riscv64 -mattr=+d,+zfhmin -verify-machineinstrs -target-abi lp64d
half-convert.llfcvt_h_d-mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f
half-convert.llfcvt_h_d-mtriple=riscv64 -mattr=+zfhmin -verify-machineinstrs -target-abi lp64f
half-convert.llfcvt_h_d-mtriple=riscv64 -verify-machineinstrs
copysign-casts.0342ac8d3d.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+d -target-abi ilp32d
copysign-casts.052ce00f93.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv64 -verify-machineinstrs
copysign-casts.0e07abf6ce.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv64 -verify-machineinstrs -mattr=+f -mattr=+d -mattr=+zfhmin -target-abi lp64d
copysign-casts.14f45aac40.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv64 -verify-machineinstrs
copysign-casts.223e985968.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+d -mattr=+zfhmin -target-abi ilp32d
copysign-casts.24ee066720.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+zfh -target-abi ilp32f
copysign-casts.2643b945d7.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv32 -verify-machineinstrs -mattr=+f -target-abi ilp32f
copysign-casts.380c2370ef.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+zfh -target-abi ilp32f
copysign-casts.3f56b89e76.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv32 -verify-machineinstrs
copysign-casts.4208779383.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+zfhmin -target-abi ilp32f
copysign-casts.4f8f8fee8a.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+d -target-abi ilp32d
copysign-casts.568f9dc1af.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv64 -verify-machineinstrs
copysign-casts.5d0ae1aaac.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv64 -verify-machineinstrs -mattr=+f -mattr=+d -target-abi lp64d
copysign-casts.9acfbd29e0.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+d -mattr=+zfhmin -target-abi ilp32d
copysign-casts.aa4bc35914.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv32 -verify-machineinstrs -mattr=+f -target-abi ilp32f
copysign-casts.ab40e62ab0.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv64 -verify-machineinstrs -mattr=+f -mattr=+d -target-abi lp64d
copysign-casts.b5dce468c2.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+zfhmin -target-abi ilp32f
copysign-casts.bc19fc459f.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv32 -verify-machineinstrs -mattr=+f -target-abi ilp32f
copysign-casts.bf800d3584.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv64 -verify-machineinstrs -mattr=+f -mattr=+d -target-abi lp64d
copysign-casts.c5b3dae52c.ll (mutant of copysign-casts.ll)fold_demote_h_d-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_d-mtriple=riscv32 -verify-machineinstrs
copysign-casts.cef060138a.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+zfhmin -target-abi ilp32f
copysign-casts.d162d14f5f.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv32 -verify-machineinstrs
copysign-casts.db0006a952.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+d -target-abi ilp32d
copysign-casts.f32d1b969c.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv64 -verify-machineinstrs -mattr=+f -mattr=+d -mattr=+zfhmin -target-abi lp64d
copysign-casts.fbbafa78f9.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv64 -verify-machineinstrs -mattr=+f -mattr=+d -mattr=+zfhmin -target-abi lp64d
copysign-casts.fef492b456.ll (mutant of copysign-casts.ll)fold_demote_h_d-mtriple=riscv32 -verify-machineinstrs -mattr=+f -mattr=+zfh -target-abi ilp32f
fp16-promote.c2324e0ea9.ll (mutant of fp16-promote.ll)test_fptrunc_double-mtriple=riscv32 -mattr +d -target-abi ilp32d

Generated 2026-10-15 08:05 UTC.