fallback: legalize: G_STORE p1,p0

Run:main-04ca53e65f-20261014-113325
Kind:fallback
Category:legalize: G_STORE p1,p0 NEW
Occurrences:4 in 2 configs, 1 test files
Snippet from:addrspacecast.aa190fded1.ll (mutant of 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) {
  %A = alloca ptr addrspace(1), align 8
  store ptr addrspace(1) poison, ptr %A, align 8
  %ptr0 = addrspacecast ptr addrspace(1) %ptr to ptr
  store i32 0, ptr %ptr0, align 4
  %G = getelementptr float, ptr addrspace(1) %ptr, i128 170141183460469231731687303715884105727
  store ptr addrspace(1) %G, ptr %A, align 8
  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: G_STORE %9:_(p1), %1:_(p0) :: (store (p1) into %ir.A, align 8) (in function: cast0)
warning: Instruction selection used fallback path for cast0

Occurrences (4):

InputFunctionConfig
addrspacecast.112dd693e2.ll (mutant of addrspacecast.ll)cast0-mtriple=riscv32 -verify-machineinstrs
addrspacecast.329644ff34.ll (mutant of addrspacecast.ll)cast0-mtriple=riscv64 -verify-machineinstrs
addrspacecast.aa190fded1.ll (mutant of addrspacecast.ll)cast0-mtriple=riscv32 -verify-machineinstrs
addrspacecast.d1d74688be.ll (mutant of addrspacecast.ll)cast0-mtriple=riscv64 -verify-machineinstrs

Generated 2026-10-15 08:05 UTC.