fallback: legalize: G_SREM <2 x s64>

Run:explore-04ca53e65f-20261014-114124
Kind:fallback
Category:legalize: G_SREM <2 x s64> NEW
Occurrences:1 in 1 configs, 1 test files
Snippet from:xqcilo-xqcilia-frame-index.c35e2405ce.ll (mutant of xqcilo-xqcilia-frame-index.ll) @fi_addr_escapes via llvm-extract
Config:-mtriple=riscv32 -mattr=+xqcilo,+xqcilia -riscv-no-aliases
Local check:reproduces at 04ca53e65f
Compiler Explorer:not uploaded (over --godbolt-limit or disabled)

Snippet:

@G = external global <2 x i64>

declare void @use(ptr)

; Function Attrs: nounwind
define void @fi_addr_escapes(i32 %x) #0 {
  %LGV = load <2 x i64>, ptr @G, align 16
  %arr = alloca [4000000 x i8], align 4
  %L = load <2 x i64>, ptr %arr, align 16
  %p1 = getelementptr inbounds [4000000 x i8], ptr %arr, i32 0, i32 3000000
  call void @use(ptr %p1)
  %p0 = getelementptr inbounds [4000000 x i8], ptr %arr, i32 0, i32 0
  %B = srem <2 x i64> %L, %LGV
  call void @use(ptr %p0)
  store <2 x i64> %B, ptr poison, align 16
  ret void
}

attributes #0 = { nounwind }

Reproduce:

llc -mtriple=riscv32 -mattr=+xqcilo,+xqcilia -riscv-no-aliases -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -mattr=+xqcilo,+xqcilia -riscv-no-aliases -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to legalize instruction: %7:_(<2 x s64>) = G_SREM %4:_, %1:_ (in function: fi_addr_escapes)
warning: Instruction selection used fallback path for fi_addr_escapes

Occurrences (1):

InputFunctionConfig
xqcilo-xqcilia-frame-index.c35e2405ce.ll (mutant of xqcilo-xqcilia-frame-index.ll)fi_addr_escapes-mtriple=riscv32 -mattr=+xqcilo,+xqcilia -riscv-no-aliases

Generated 2026-10-15 08:05 UTC.