third_party/llvm-7.0/llvm/test/Transforms/SimplifyCFG/X86/switch-covered-bug.ll

; RUN: opt -S -simplifycfg -switch-to-lookup < %s -mtriple=x86_64-apple-darwin12.0.0 | FileCheck %s
; rdar://17887153
target datalayout = "e-p:64:64:64-S128-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f16:16:16-f32:32:32-f64:64:64-f128:128:128-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
target triple = "x86_64-apple-darwin12.0.0"

; When we have a covered lookup table, make sure we don't delete PHINodes that
; are cached in PHIs.
; CHECK-LABEL: @test
; CHECK: entry:
; CHECK-NEXT: sub i3 %arg, -4
; CHECK-NEXT: zext i3 %switch.tableidx to i4
; CHECK-NEXT: getelementptr inbounds [8 x i64], [8 x i64]* @switch.table.test, i32 0, i4 %switch.tableidx.zext
; CHECK-NEXT: load i64, i64* %switch.gep
; CHECK-NEXT: add i64
; CHECK-NEXT: ret i64
define i64 @test(i3 %arg) {
entry:
  switch i3 %arg, label %Default [
    i3 -2, label %Label6
    i3 1, label %Label1
    i3 2, label %Label2
    i3 3, label %Label3
    i3 -4, label %Label4
    i3 -3, label %Label5
  ]

Default:
  %v1 = phi i64 [ 7, %Label6 ], [ 11, %Label5 ], [ 6, %Label4 ], [ 13, %Label3 ], [ 9, %Label2 ], [ 15, %Label1 ], [ 8, %entry ]
  %v2 = phi i64 [ 0, %Label6 ], [ 0, %Label5 ], [ 0, %Label4 ], [ 0, %Label3 ], [ 0, %Label2 ], [ 0, %Label1 ], [ 0, %entry ]
  %v3 = add i64 %v1, %v2
  ret i64 %v3

Label1:
  br label %Default

Label2:
  br label %Default

Label3:
  br label %Default

Label4:
  br label %Default

Label5:
  br label %Default

Label6:
  br label %Default
}