fallback: legalize: G

fallback: legalize: G_FPOW s16

Run:	explore-bc8218b282-20261015-075519
Kind:	fallback
Category:	legalize: G_FPOW s16
Occurrences:	28 in 18 configs, 1 test files
Snippet from:	half-intrinsics.ll @pow_f16 via llvm-extract
Config:	`-mtriple=riscv32 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi ilp32d`
Local check:	reproduces at bc8218b282
Compiler Explorer:	not uploaded (over --godbolt-limit or disabled)

Snippet:

; Function Attrs: nounwind
define half @pow_f16(half %a, half %b) #0 {
  %1 = call half @llvm.pow.f16(half %a, half %b)
  ret half %1
}

; Function Attrs: nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none)
declare half @llvm.pow.f16(half, half) #1

attributes #0 = { nounwind }
attributes #1 = { nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none) }

Reproduce:

llc -mtriple=riscv32 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi ilp32d -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi ilp32d -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to legalize instruction: %2:_(s16) = G_FPOW %0:_, %1:_ (in function: pow_f16)
warning: Instruction selection used fallback path for pow_f16

Occurrences (28):

Input	Function	Config
half-intrinsics.ll	pow_f16	`-mtriple=riscv32 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi ilp32d`
half-intrinsics.ll	pow_f16	`-mtriple=riscv32 -mattr=+d -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32d`
half-intrinsics.ll	pow_f16	`-mtriple=riscv32 -mattr=+zfh -verify-machineinstrs -target-abi ilp32f`
half-intrinsics.ll	pow_f16	`-mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f`
half-intrinsics.ll	pow_f16	`-mtriple=riscv32 -verify-machineinstrs`
half-intrinsics.ll	pow_f16	`-mtriple=riscv64 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi lp64d`
half-intrinsics.ll	pow_f16	`-mtriple=riscv64 -mattr=+d -mattr=+zfhmin -verify-machineinstrs -target-abi lp64d`
half-intrinsics.ll	pow_f16	`-mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f`
half-intrinsics.ll	pow_f16	`-mtriple=riscv64 -mattr=+zfhmin -verify-machineinstrs -target-abi lp64f`
half-intrinsics.ll	pow_f16	`-mtriple=riscv64 -verify-machineinstrs`
half-intrinsics.1abd66109c.ll (mutant of half-intrinsics.ll)	pow_f16	`-mtriple=riscv32 -mattr=+zhinx -verify-machineinstrs -target-abi ilp32`
half-intrinsics.25ff9bf7f8.ll (mutant of half-intrinsics.ll)	pow_f16	`-mtriple=riscv64 -mattr=+zhinx -verify-machineinstrs -target-abi lp64`
half-intrinsics.2fd6e85804.ll (mutant of half-intrinsics.ll)	pow_f16	`-mtriple=riscv64 -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64`
half-intrinsics.4395429b10.ll (mutant of half-intrinsics.ll)	pow_f16	`-mtriple=riscv64 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi lp64d`
half-intrinsics.483474dda3.ll (mutant of half-intrinsics.ll)	pow_f16	`-mtriple=riscv64 -mattr=+zfh -verify-machineinstrs -target-abi lp64f`
half-intrinsics.57f1dfa014.ll (mutant of half-intrinsics.ll)	pow_f16	`-mtriple=riscv32 -mattr=+zfh -verify-machineinstrs -target-abi ilp32f`
half-intrinsics.5ff4716283.ll (mutant of half-intrinsics.ll)	pow_f16	`-mtriple=riscv32 -verify-machineinstrs`
half-intrinsics.65802dd297.ll (mutant of half-intrinsics.ll)	pow_f16	`-mtriple=riscv32 -mattr=+d -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32d`
half-intrinsics.65bc37365e.ll (mutant of half-intrinsics.ll)	pow_f16	`-mtriple=riscv64 -mattr=+zdinx -mattr=+zhinx -verify-machineinstrs -target-abi lp64`
half-intrinsics.8c2dc177ee.ll (mutant of half-intrinsics.ll)	pow_f16	`-mtriple=riscv32 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi ilp32d`
half-intrinsics.92c8a7492c.ll (mutant of half-intrinsics.ll)	pow_f16	`-mtriple=riscv64 -mattr=+zdinx -mattr=+zhinxmin -verify-machineinstrs -target-abi lp64`
half-intrinsics.b5f2c7ede7.ll (mutant of half-intrinsics.ll)	pow_f16	`-mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f`
half-intrinsics.d4077e082e.ll (mutant of half-intrinsics.ll)	pow_f16	`-mtriple=riscv64 -mattr=+zfhmin -verify-machineinstrs -target-abi lp64f`
half-intrinsics.d4cacefc43.ll (mutant of half-intrinsics.ll)	pow_f16	`-mtriple=riscv32 -mattr=+zdinx -mattr=+zhinx -verify-machineinstrs -target-abi ilp32`
half-intrinsics.d9548e1b86.ll (mutant of half-intrinsics.ll)	pow_f16	`-mtriple=riscv64 -verify-machineinstrs`
half-intrinsics.e3703ae6af.ll (mutant of half-intrinsics.ll)	pow_f16	`-mtriple=riscv32 -mattr=+zdinx -mattr=+zhinxmin -verify-machineinstrs -target-abi ilp32`
half-intrinsics.eaa30dea89.ll (mutant of half-intrinsics.ll)	pow_f16	`-mtriple=riscv64 -mattr=+d -mattr=+zfhmin -verify-machineinstrs -target-abi lp64d`
half-intrinsics.f82cf0beed.ll (mutant of half-intrinsics.ll)	pow_f16	`-mtriple=riscv32 -mattr=+zhinxmin -verify-machineinstrs -target-abi ilp32`

Generated 2026-10-15 08:05 UTC.