llvm/test/Transforms/SLPVectorizer/X86/ordering-bug.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -mtriple=i386-linux-gnu -passes=slp-vectorizer -S %s | FileCheck %s

%struct.a = type { [2 x i64] }

@a = external global %struct.a
@b = external global %struct.a
@c = external global %struct.a

define void @f(i1 %x) #0 {
; CHECK-LABEL: @f(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[A1:%.*]] = load i64, ptr getelementptr inbounds ([[STRUCT_A:%.*]], ptr @a, i32 0, i32 0, i32 1), align 8
; CHECK-NEXT:    [[TMP0:%.*]] = load <2 x i64>, ptr @a, align 8
; CHECK-NEXT:    br i1 [[X:%.*]], label [[WHILE_BODY_LR_PH:%.*]], label [[WHILE_END:%.*]]
; CHECK:       while.body.lr.ph:
; CHECK-NEXT:    [[ICMP_A1:%.*]] = icmp eq i64 [[A1]], 0
; CHECK-NEXT:    [[TMP1:%.*]] = load <2 x i64>, ptr @b, align 8
; CHECK-NEXT:    [[TMP2:%.*]] = insertelement <2 x i1> poison, i1 [[ICMP_A1]], i32 0
; CHECK-NEXT:    [[TMP3:%.*]] = shufflevector <2 x i1> [[TMP2]], <2 x i1> poison, <2 x i32> zeroinitializer
; CHECK-NEXT:    [[TMP4:%.*]] = select <2 x i1> [[TMP3]], <2 x i64> [[TMP1]], <2 x i64> [[TMP0]]
; CHECK-NEXT:    br label [[WHILE_END]]
; CHECK:       while.end:
; CHECK-NEXT:    [[TMP5:%.*]] = phi <2 x i64> [ [[TMP0]], [[ENTRY:%.*]] ], [ [[TMP4]], [[WHILE_BODY_LR_PH]] ]
; CHECK-NEXT:    [[TMP6:%.*]] = load <2 x i64>, ptr @c, align 8
; CHECK-NEXT:    [[TMP7:%.*]] = extractelement <2 x i64> [[TMP5]], i32 0
; CHECK-NEXT:    [[ICMP_D0:%.*]] = icmp eq i64 [[TMP7]], 0
; CHECK-NEXT:    br i1 [[ICMP_D0]], label [[IF_END:%.*]], label [[IF_THEN:%.*]]
; CHECK:       if.then:
; CHECK-NEXT:    [[AND0_TMP:%.*]] = and i64 [[TMP7]], 8
; CHECK-NEXT:    [[TMP8:%.*]] = insertelement <2 x i64> poison, i64 [[AND0_TMP]], i32 0
; CHECK-NEXT:    [[TMP9:%.*]] = shufflevector <2 x i64> [[TMP8]], <2 x i64> [[TMP5]], <2 x i32> <i32 0, i32 3>
; CHECK-NEXT:    [[TMP10:%.*]] = and <2 x i64> [[TMP9]], [[TMP6]]
; CHECK-NEXT:    store <2 x i64> [[TMP10]], ptr @a, align 8
; CHECK-NEXT:    br label [[IF_END]]
; CHECK:       if.end:
; CHECK-NEXT:    ret void
;
entry:
  %a0 = load i64, ptr @a, align 8
  %a1 = load i64, ptr getelementptr inbounds (%struct.a, ptr @a, i32 0, i32 0, i32 1), align 8
  br i1 %x, label %while.body.lr.ph, label %while.end

while.body.lr.ph:
  %icmp.a1 = icmp eq i64 %a1, 0
  %b0 = load i64, ptr @b, align 8
  %b1 = load i64, ptr getelementptr inbounds (%struct.a, ptr @b, i32 0, i32 0, i32 1), align 8
  %c0 = select i1 %icmp.a1, i64 %b0, i64 %a0
  %c1 = select i1 %icmp.a1, i64 %b1, i64 %a1
  br label %while.end

while.end:
  %d0 = phi i64 [ %a0, %entry ], [ %c0, %while.body.lr.ph ]
  %d1 = phi i64 [ %a1, %entry ], [ %c1, %while.body.lr.ph ]
  %e0 = load i64, ptr @c, align 8
  %e1 = load i64, ptr getelementptr inbounds (%struct.a, ptr @c, i32 0, i32 0, i32 1), align 8
  %icmp.d0 = icmp eq i64 %d0, 0
  br i1 %icmp.d0, label %if.end, label %if.then

if.then:
  %and0.tmp = and i64 %d0, 8
  %and0 = and i64 %and0.tmp, %e0
  %and1 = and i64 %e1, %d1
  store i64 %and0, ptr @a, align 8
  store i64 %and1, ptr getelementptr inbounds (%struct.a, ptr @a, i32 0, i32 0, i32 1), align 8
  br label %if.end

if.end:
  ret void
}

attributes #0 = { "target-features"="+sse2" }