fallback: legalize: G_EXTRACT s64,s168

Run:explore-bc8218b282-20261015-075519
Kind:fallback
Category:legalize: G_EXTRACT s64,s168
Occurrences:3 in 1 configs, 1 test files
Snippet from:stack-slot-size.ll @caller161 via llvm-extract
Config:-mtriple=riscv64 -verify-machineinstrs
Local check:reproduces at bc8218b282
Compiler Explorer:not uploaded (over --godbolt-limit or disabled)

Snippet:

declare void @callee161(i161)

; Function Attrs: nounwind
define i32 @caller161() #0 {
  %1 = alloca i32, align 4
  store i32 42, ptr %1, align 4
  call void @callee161(i161 0)
  %2 = load i32, ptr %1, align 4
  ret i32 %2
}

attributes #0 = { nounwind }

Reproduce:

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

Local llc output:

remark: <unknown>:0:0: unable to legalize instruction: %10:_(s64) = G_EXTRACT %9:_(s168), 0 (in function: caller161)
warning: Instruction selection used fallback path for caller161

Occurrences (3):

InputFunctionConfig
stack-slot-size.llcaller161-mtriple=riscv64 -verify-machineinstrs
stack-slot-size.5e9f8cc2d7.ll (mutant of stack-slot-size.ll)caller161-mtriple=riscv64 -verify-machineinstrs
stack-slot-size.d276ac7c61.ll (mutant of stack-slot-size.ll)caller161-mtriple=riscv64 -verify-machineinstrs

Generated 2026-10-15 08:05 UTC.