fallback: legalize: G_ADDRSPACE_CAST p0,p1

Run:explore-04ca53e65f-20261014-114124
Kind:fallback
Category:legalize: G_ADDRSPACE_CAST p0,p1
Occurrences:8 in 2 configs, 1 test files
Snippet from:addrspacecast.ll @cast0 via llvm-extract
Config:-mtriple=riscv32 -verify-machineinstrs
Local check:reproduces at 04ca53e65f
Compiler Explorer:not uploaded (over --godbolt-limit or disabled)

Snippet:

define void @cast0(ptr addrspace(1) %ptr) {
  %ptr0 = addrspacecast ptr addrspace(1) %ptr to ptr
  store i32 0, ptr %ptr0, align 4
  ret void
}

Reproduce:

llc -mtriple=riscv32 -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -verify-machineinstrs -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to legalize instruction: %1:_(p0) = G_ADDRSPACE_CAST %0:_(p1) (in function: cast0)
warning: Instruction selection used fallback path for cast0

Occurrences (8):

InputFunctionConfig
addrspacecast.llcast0-mtriple=riscv32 -verify-machineinstrs
addrspacecast.llcast0-mtriple=riscv64 -verify-machineinstrs
addrspacecast.0e8aa8f4dd.ll (mutant of addrspacecast.ll)cast0-mtriple=riscv64 -verify-machineinstrs
addrspacecast.27cd4c4dbb.ll (mutant of addrspacecast.ll)cast0-mtriple=riscv64 -verify-machineinstrs
addrspacecast.3d08504911.ll (mutant of addrspacecast.ll)cast0-mtriple=riscv32 -verify-machineinstrs
addrspacecast.7b792ceb0f.ll (mutant of addrspacecast.ll)cast0-mtriple=riscv32 -verify-machineinstrs
addrspacecast.cf2860b2ad.ll (mutant of addrspacecast.ll)cast0-mtriple=riscv32 -verify-machineinstrs
addrspacecast.e246c06017.ll (mutant of addrspacecast.ll)cast0-mtriple=riscv64 -verify-machineinstrs

Generated 2026-10-15 08:05 UTC.