llvm/test/Transforms/SLPVectorizer/X86/crash_binaryop.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=slp-vectorizer -S -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7 | FileCheck %s

target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-darwin13.3.0"

@a = common global double 0.000000e+00, align 8

define i32 @fn1() {
; CHECK-LABEL: @fn1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[INIT:%.*]] = load double, ptr @a, align 8
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[PHI:%.*]] = phi double [ [[ADD2:%.*]], [[LOOP]] ], [ [[INIT]], [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[POSTADD1_PHI:%.*]] = phi double [ [[POSTADD1:%.*]], [[LOOP]] ], [ [[INIT]], [[ENTRY]] ]
; CHECK-NEXT:    [[POSTADD2_PHI:%.*]] = phi double [ [[POSTADD2:%.*]], [[LOOP]] ], [ [[INIT]], [[ENTRY]] ]
; CHECK-NEXT:    [[ADD1:%.*]] = fadd double [[POSTADD1_PHI]], undef
; CHECK-NEXT:    [[ADD2]] = fadd double [[POSTADD2_PHI]], [[PHI]]
; CHECK-NEXT:    [[MUL2:%.*]] = fmul double [[ADD2]], 0.000000e+00
; CHECK-NEXT:    [[BINARYOP_B:%.*]] = fadd double [[POSTADD1_PHI]], [[MUL2]]
; CHECK-NEXT:    [[MUL1:%.*]] = fmul double [[ADD1]], 0.000000e+00
; CHECK-NEXT:    [[TMP:%.*]] = fadd double [[POSTADD2_PHI]], 0.000000e+00
; CHECK-NEXT:    [[BINARY_V:%.*]] = fadd double [[MUL1]], [[BINARYOP_B]]
; CHECK-NEXT:    [[POSTADD1]] = fadd double [[BINARY_V]], 0.000000e+00
; CHECK-NEXT:    [[POSTADD2]] = fadd double [[TMP]], 1.000000e+00
; CHECK-NEXT:    [[TOBOOL:%.*]] = fcmp une double [[POSTADD1]], 0.000000e+00
; CHECK-NEXT:    br i1 [[TOBOOL]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    ret i32 1
;
entry:
  %init = load double, ptr @a, align 8
  br label %loop

loop:
  %phi = phi double [ %add2, %loop ], [ %init, %entry ]
  %postadd1_phi = phi double [ %postadd1, %loop ], [ %init, %entry ]
  %postadd2_phi = phi double [ %postadd2, %loop ], [ %init, %entry ]
  %add1 = fadd double %postadd1_phi, undef
  %add2 = fadd double %postadd2_phi, %phi
  %mul2 = fmul double %add2, 0.000000e+00
  %binaryop_B = fadd double %postadd1_phi, %mul2
  %mul1 = fmul double %add1, 0.000000e+00
  %tmp = fadd double %postadd2_phi, 0.000000e+00

  ; tryToVectorize() starts with this binary instruction.
  ; At the same time vectorization wraps around the loop, vectorizes
  ; postadd1/2 and eventually binary_V and tmp. So binary_V itself is replaced
  ; with a vector instruction.
  ; The SLPVectorizer crashed because it tried to use binary_V
  ; after vectorization to re-arrange instructions.
  %binary_V = fadd double %mul1, %binaryop_B

  %postadd1 = fadd double %binary_V, 0.000000e+00
  %postadd2 = fadd double %tmp, 1.000000e+00
  %tobool = fcmp une double %postadd1, 0.000000e+00
  br i1 %tobool, label %exit, label %loop

exit:
  ret i32 1
}