File: convert-alloca-scope.mlir

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// RUN: mlir-opt -finalize-memref-to-llvm  %s | FileCheck %s

// CHECK-LABEL: @empty
func.func @empty() {
  // CHECK: llvm.intr.stacksave
  // CHECK: llvm.br
  memref.alloca_scope {
    memref.alloca_scope.return
  }
  // CHECK: llvm.intr.stackrestore
  // CHECK: llvm.br
  return
}

// CHECK-LABEL: @returns_nothing
func.func @returns_nothing(%b: f32) {
  %a = arith.constant 10.0 : f32
  // CHECK: llvm.intr.stacksave
  memref.alloca_scope {
    %c = arith.addf %a, %b : f32
    memref.alloca_scope.return
  }
  // CHECK: llvm.intr.stackrestore
  return
}

// CHECK-LABEL: @returns_one_value
func.func @returns_one_value(%b: f32) -> f32 {
  %a = arith.constant 10.0 : f32
  // CHECK: llvm.intr.stacksave
  %result = memref.alloca_scope -> f32 {
    %c = arith.addf %a, %b : f32
    memref.alloca_scope.return %c: f32
  }
  // CHECK: llvm.intr.stackrestore
  return %result : f32
}

// CHECK-LABEL: @returns_multiple_values
func.func @returns_multiple_values(%b: f32) -> f32 {
  %a = arith.constant 10.0 : f32
  // CHECK: llvm.intr.stacksave
  %result1, %result2 = memref.alloca_scope -> (f32, f32) {
    %c = arith.addf %a, %b : f32
    %d = arith.subf %a, %b : f32
    memref.alloca_scope.return %c, %d: f32, f32
  }
  // CHECK: llvm.intr.stackrestore
  %result = arith.addf %result1, %result2 : f32
  return %result : f32
}