llvm/test/CodeGen/WebAssembly/multivalue-do-not-stackify.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py

; RUN: llc < %s -verify-machineinstrs -mattr=+multivalue -target-abi=experimental-mv -O2 | FileCheck %s

target triple = "wasm32-unknown-unknown"

; Regression test for #98323 where attempting to stackify the call to `@foo`
; historically led to a miscompile.

define i64 @test() {
; CHECK-LABEL: test:
; CHECK:         .functype test () -> (i64)
; CHECK-NEXT:    .local i64, i64
; CHECK-NEXT:  # %bb.0: # %entry
; CHECK-NEXT:    call foo
; CHECK-NEXT:    local.set 1
; CHECK-NEXT:    local.set 0
; CHECK-NEXT:    i64.const 42
; CHECK-NEXT:    local.get 1
; CHECK-NEXT:    local.get 0
; CHECK-NEXT:    i64.eqz
; CHECK-NEXT:    i64.select
; CHECK-NEXT:    # fallthrough-return
entry:
  %pair = call { i64, i64 } @foo()
  %v0 = extractvalue { i64, i64 } %pair, 0
  %1 = icmp eq i64 %v0, 0
  %v1 = extractvalue { i64, i64 } %pair, 1
  %_0.sroa.0.0 = select i1 %1, i64 42, i64 %v1
  ret i64 %_0.sroa.0.0
}

declare { i64, i64 } @foo()