fallback: translate: fpext bfloat

Run:	main-04ca53e65f-20261014-113325
Kind:	fallback
Category:	translate: fpext bfloat
Occurrences:	26 in 6 configs, 2 test files
Snippet from:	bf16-promote.ll @test_fpextend_float via llvm-extract
Config:	`-mtriple=riscv32 -mattr=+d -target-abi=ilp32d`
Local check:	reproduces at 04ca53e65f
Compiler Explorer:	not uploaded (over --godbolt-limit or disabled)

Snippet:

; Function Attrs: nounwind
define float @test_fpextend_float(ptr %p) #0 {
  %a = load bfloat, ptr %p, align 2
  %r = fpext bfloat %a to float
  ret float %r
}

attributes #0 = { nounwind }

Reproduce:

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

Local llc output:

remark: <unknown>:0:0: unable to translate instruction: fpext: '  %r = fpext bfloat %a to float' (in function: test_fpextend_float)
warning: Instruction selection used fallback path for test_fpextend_float

Occurrences (26):

Input	Function	Config
bf16-promote.ll	test_fpextend_float	`-mtriple=riscv32 -mattr=+d -target-abi=ilp32d`
bf16-promote.ll	test_fpextend_double	`-mtriple=riscv32 -mattr=+d -target-abi=ilp32d`
bf16-promote.ll	test_fpextend_float	`-mtriple=riscv64 -mattr=+d -target-abi=lp64d`
bf16-promote.ll	test_fpextend_double	`-mtriple=riscv64 -mattr=+d -target-abi=lp64d`
xandesbfhcvt.ll	loadstorebf16	`-mtriple=riscv32 -mattr=+xandesbfhcvt -target-abi ilp32f -verify-machineinstrs`
xandesbfhcvt.ll	loadstorebf16	`-mtriple=riscv32 -mattr=+zfh,+xandesbfhcvt -target-abi ilp32f -verify-machineinstrs`
xandesbfhcvt.ll	loadstorebf16	`-mtriple=riscv64 -mattr=+xandesbfhcvt -target-abi lp64f -verify-machineinstrs`
xandesbfhcvt.ll	loadstorebf16	`-mtriple=riscv64 -mattr=+zfh,+xandesbfhcvt -target-abi lp64f -verify-machineinstrs`
bf16-promote.2b3ba0e3d9.ll (mutant of bf16-promote.ll)	test_fpextend_double	`-mtriple=riscv64 -mattr=+d -target-abi=lp64d`
bf16-promote.4d03bc5656.ll (mutant of bf16-promote.ll)	test_fpextend_double	`-mtriple=riscv32 -mattr=+d -target-abi=ilp32d`
bf16-promote.65aac7c3b1.ll (mutant of bf16-promote.ll)	test_fpextend_double	`-mtriple=riscv32 -mattr=+d -target-abi=ilp32d`
bf16-promote.6c0c931340.ll (mutant of bf16-promote.ll)	test_fpextend_double	`-mtriple=riscv64 -mattr=+d -target-abi=lp64d`
bf16-promote.8b91f67f87.ll (mutant of bf16-promote.ll)	test_fpextend_double	`-mtriple=riscv32 -mattr=+d -target-abi=ilp32d`
bf16-promote.9833be5952.ll (mutant of bf16-promote.ll)	test_fpextend_double	`-mtriple=riscv64 -mattr=+d -target-abi=lp64d`
xandesbfhcvt.04437795f1.ll (mutant of xandesbfhcvt.ll)	loadstorebf16	`-mtriple=riscv64 -mattr=+xandesbfhcvt -target-abi lp64f -verify-machineinstrs`
xandesbfhcvt.10a1a698d0.ll (mutant of xandesbfhcvt.ll)	loadstorebf16	`-mtriple=riscv32 -mattr=+xandesbfhcvt -target-abi ilp32f -verify-machineinstrs`
xandesbfhcvt.17c3aed0df.ll (mutant of xandesbfhcvt.ll)	loadstorebf16	`-mtriple=riscv32 -mattr=+xandesbfhcvt -target-abi ilp32f -verify-machineinstrs`
xandesbfhcvt.23e8904637.ll (mutant of xandesbfhcvt.ll)	loadstorebf16	`-mtriple=riscv64 -mattr=+zfh,+xandesbfhcvt -target-abi lp64f -verify-machineinstrs`
xandesbfhcvt.2477e1a806.ll (mutant of xandesbfhcvt.ll)	loadstorebf16	`-mtriple=riscv32 -mattr=+xandesbfhcvt -target-abi ilp32f -verify-machineinstrs`
xandesbfhcvt.5c8681c099.ll (mutant of xandesbfhcvt.ll)	loadstorebf16	`-mtriple=riscv32 -mattr=+zfh,+xandesbfhcvt -target-abi ilp32f -verify-machineinstrs`
xandesbfhcvt.5e74d0d956.ll (mutant of xandesbfhcvt.ll)	loadstorebf16	`-mtriple=riscv64 -mattr=+zfh,+xandesbfhcvt -target-abi lp64f -verify-machineinstrs`
xandesbfhcvt.9e0abce959.ll (mutant of xandesbfhcvt.ll)	loadstorebf16	`-mtriple=riscv64 -mattr=+xandesbfhcvt -target-abi lp64f -verify-machineinstrs`
xandesbfhcvt.aa04f43d4e.ll (mutant of xandesbfhcvt.ll)	loadstorebf16	`-mtriple=riscv32 -mattr=+zfh,+xandesbfhcvt -target-abi ilp32f -verify-machineinstrs`
xandesbfhcvt.ad1f0e4d70.ll (mutant of xandesbfhcvt.ll)	loadstorebf16	`-mtriple=riscv64 -mattr=+xandesbfhcvt -target-abi lp64f -verify-machineinstrs`
xandesbfhcvt.b3abc5fb1b.ll (mutant of xandesbfhcvt.ll)	loadstorebf16	`-mtriple=riscv64 -mattr=+zfh,+xandesbfhcvt -target-abi lp64f -verify-machineinstrs`
xandesbfhcvt.c830176ca6.ll (mutant of xandesbfhcvt.ll)	loadstorebf16	`-mtriple=riscv32 -mattr=+zfh,+xandesbfhcvt -target-abi ilp32f -verify-machineinstrs`

Generated 2026-10-15 08:05 UTC.