fallback: legalize: G

fallback: legalize: G_FSIN s16

Run:	explore-bc8218b282-20261015-075519
Kind:	fallback
Category:	legalize: G_FSIN s16
Occurrences:	62 in 24 configs, 2 test files
Snippet from:	libcall-tail-calls.ll @sin_f16 via llvm-extract
Config:	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32`
Local check:	reproduces at bc8218b282
Compiler Explorer:	not uploaded (over --godbolt-limit or disabled)

Snippet:

; Function Attrs: nounwind
define half @sin_f16(half %a) #0 {
  %1 = call half @llvm.sin.f16(half %a)
  ret half %1
}

; Function Attrs: nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none)
declare half @llvm.sin.f16(half) #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=ilp32 -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32 -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to legalize instruction: %2:_(s16) = G_FSIN %0:_ (in function: sin_f16)
warning: Instruction selection used fallback path for sin_f16

Occurrences (62) (first 50):

Input	Function	Config
half-intrinsics.ll	sin_f16	`-mtriple=riscv32 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi ilp32d`
half-intrinsics.ll	sin_f16	`-mtriple=riscv32 -mattr=+d -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32d`
half-intrinsics.ll	sin_f16	`-mtriple=riscv32 -mattr=+zfh -verify-machineinstrs -target-abi ilp32f`
half-intrinsics.ll	sin_f16	`-mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f`
half-intrinsics.ll	sin_f16	`-mtriple=riscv32 -verify-machineinstrs`
half-intrinsics.ll	sin_f16	`-mtriple=riscv64 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi lp64d`
half-intrinsics.ll	sin_f16	`-mtriple=riscv64 -mattr=+d -mattr=+zfhmin -verify-machineinstrs -target-abi lp64d`
half-intrinsics.ll	sin_f16	`-mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f`
half-intrinsics.ll	sin_f16	`-mtriple=riscv64 -mattr=+zfhmin -verify-machineinstrs -target-abi lp64f`
half-intrinsics.ll	sin_f16	`-mtriple=riscv64 -verify-machineinstrs`
libcall-tail-calls.ll	sin_f16	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32`
libcall-tail-calls.ll	sin_f16	`-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d`
libcall-tail-calls.ll	sin_f16	`-mtriple=riscv32 -mattr=+f -verify-machineinstrs -target-abi=ilp32f`
libcall-tail-calls.ll	sin_f16	`-mtriple=riscv32 -verify-machineinstrs`
libcall-tail-calls.ll	sin_f16	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64`
libcall-tail-calls.ll	sin_f16	`-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d`
libcall-tail-calls.ll	sin_f16	`-mtriple=riscv64 -mattr=+f -verify-machineinstrs -target-abi=lp64f`
libcall-tail-calls.ll	sin_f16	`-mtriple=riscv64 -verify-machineinstrs`
half-intrinsics.0611658051.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv64 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi lp64d`
half-intrinsics.1563b9d66b.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv64 -mattr=+zdinx -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64`
half-intrinsics.1abd66109c.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv32 -mattr=+zhinx -verify-machineinstrs -target-abi ilp32`
half-intrinsics.25ff9bf7f8.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs -target-abi lp64`
half-intrinsics.2684b487f7.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv32 -mattr=+zhinx -verify-machineinstrs -target-abi ilp32`
half-intrinsics.2fd6e85804.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv64 -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64`
half-intrinsics.3683172428.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f`
half-intrinsics.4395429b10.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv64 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi lp64d`
half-intrinsics.483474dda3.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f`
half-intrinsics.48e7203730.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv32 -mattr=+zdinx -mattr=+zhinx -verify-machineinstrs -target-abi ilp32`
half-intrinsics.57f1dfa014.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv32 -mattr=+zfh -verify-machineinstrs -target-abi ilp32f`
half-intrinsics.59f4cbe70c.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv32 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi ilp32d`
half-intrinsics.5ff4716283.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv32 -verify-machineinstrs`
half-intrinsics.63ea818451.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv32 -mattr=+zhinxmin -verify-machineinstrs -target-abi ilp32`
half-intrinsics.65802dd297.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv32 -mattr=+d -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32d`
half-intrinsics.65bc37365e.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv64 -mattr=+zdinx -mattr=+zhinx -verify-machineinstrs -target-abi lp64`
half-intrinsics.66f831b3be.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f`
half-intrinsics.8c2dc177ee.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv32 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi ilp32d`
half-intrinsics.92c8a7492c.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv64 -mattr=+zdinx -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64`
half-intrinsics.a313ed6fb3.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv64 -mattr=+d -mattr=+zfhmin -verify-machineinstrs -target-abi lp64d`
half-intrinsics.aa60e8aba5.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs -target-abi lp64`
half-intrinsics.b57ed922c1.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv64 -mattr=+zdinx -mattr=+zhinx -verify-machineinstrs -target-abi lp64`
half-intrinsics.b5a4550b4b.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv64 -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64`
half-intrinsics.b5f2c7ede7.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f`
half-intrinsics.c3f14ad874.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv32 -mattr=+zdinx -mattr=+zhinxmin -verify-machineinstrs -target-abi ilp32`
half-intrinsics.c69bceb248.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv64 -verify-machineinstrs`
half-intrinsics.cd861ac62d.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv32 -mattr=+d -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32d`
half-intrinsics.d4077e082e.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv64 -mattr=+zfhmin -verify-machineinstrs -target-abi lp64f`
half-intrinsics.d4cacefc43.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv32 -mattr=+zdinx -mattr=+zhinx -verify-machineinstrs -target-abi ilp32`
half-intrinsics.d9548e1b86.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv64 -verify-machineinstrs`
half-intrinsics.dce72ed29e.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv32 -verify-machineinstrs`
half-intrinsics.e00d99f8a1.ll (mutant of half-intrinsics.ll)	sin_f16	`-mtriple=riscv64 -mattr=+zfhmin -verify-machineinstrs -target-abi lp64f`

Generated 2026-10-15 08:05 UTC.