fallback: legalize: G_LOAD <32 x s16>,p0

Run:	explore-bc8218b282-20261015-075519
Kind:	fallback
Category:	legalize: G_LOAD <32 x s16>,p0 NEW
Occurrences:	4 in 4 configs, 1 test files
Snippet from:	fastcc-without-f-reg.1b6b6aa46d.ll (mutant of fastcc-without-f-reg.ll) @caller_half_32 via llvm-extract
Config:	`-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs`
Local check:	reproduces at bc8218b282
Compiler Explorer:	not uploaded (over --godbolt-limit or disabled)

Snippet:

; Function Attrs: nounwind
declare fastcc half @callee_half_32(<32 x half>) #0

; Function Attrs: nounwind
define half @caller_half_32(<32 x half> %A) #0 {
  %A2 = alloca i1, align 1
  store i1 poison, ptr %A2, align 1
  %C1 = fcmp uno float f0x7F7FFFFF, +qnan
  %C = call fastcc half @callee_half_32(<32 x half> %A)
  store i1 %C1, ptr %A2, align 1
  ret half %C
}

attributes #0 = { nounwind }

Reproduce:

llc -mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to legalize instruction: %0:_(<32 x s16>) = G_LOAD %1:_(p0) :: (load (<32 x s16>)) (in function: caller_half_32)
warning: Instruction selection used fallback path for caller_half_32

Occurrences (4):

Input	Function	Config
fastcc-without-f-reg.1b6b6aa46d.ll (mutant of fastcc-without-f-reg.ll)	caller_half_32	`-mtriple=riscv64 -mattr=+zdinx -verify-machineinstrs`
fastcc-without-f-reg.24469fd208.ll (mutant of fastcc-without-f-reg.ll)	caller_half_32	`-mtriple=riscv32 -mattr=+zfinx -verify-machineinstrs`
fastcc-without-f-reg.33b41928e2.ll (mutant of fastcc-without-f-reg.ll)	caller_half_32	`-mtriple=riscv32 -mattr=+zdinx -verify-machineinstrs`
fastcc-without-f-reg.a2fd847557.ll (mutant of fastcc-without-f-reg.ll)	caller_half_32	`-mtriple=riscv64 -mattr=+zfinx -verify-machineinstrs`

Generated 2026-10-15 08:05 UTC.