; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
; RUN: opt < %s -passes=loop-interchange -cache-line-size=4 -loop-interchange-threshold=-100 -verify-dom-info -verify-loop-info -verify-scev -verify-loop-lcssa -S | FileCheck %s

; Make sure the loops are in LCSSA form after loop interchange,
; and loop interchange does not hit assertion errors and crash.

target triple = "x86_64-unknown-linux-gnu"

@b = external global [512 x [4 x i32]], align 1
@c = external global [2 x [4 x i32]], align 1
@d = external global [1024 x [512 x [4 x i32]]], align 1

define void @test1() {
; CHECK-LABEL: define void @test1() {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br label %[[FOR_COND37_PREHEADER_PREHEADER:.*]]
; CHECK:       [[FOR_COND33_PREHEADER_PREHEADER:.*]]:
; CHECK-NEXT:    br label %[[FOR_COND33_PREHEADER:.*]]
; CHECK:       [[FOR_COND33_PREHEADER]]:
; CHECK-NEXT:    [[I_011:%.*]] = phi i16 [ [[INC69:%.*]], %[[FOR_END67:.*]] ], [ 0, %[[FOR_COND33_PREHEADER_PREHEADER]] ]
; CHECK-NEXT:    br label %[[FOR_BODY42_SPLIT1:.*]]
; CHECK:       [[FOR_BODY42_PREHEADER:.*]]:
; CHECK-NEXT:    br label %[[FOR_BODY42:.*]]
; CHECK:       [[FOR_COND37_PREHEADER_PREHEADER]]:
; CHECK-NEXT:    br label %[[FOR_COND37_PREHEADER:.*]]
; CHECK:       [[FOR_COND37_PREHEADER]]:
; CHECK-NEXT:    [[J_010:%.*]] = phi i16 [ [[INC66:%.*]], %[[FOR_END64:.*]] ], [ 0, %[[FOR_COND37_PREHEADER_PREHEADER]] ]
; CHECK-NEXT:    br label %[[FOR_BODY42_PREHEADER]]
; CHECK:       [[FOR_BODY42]]:
; CHECK-NEXT:    [[K_09:%.*]] = phi i16 [ [[TMP1:%.*]], %[[FOR_BODY42_SPLIT:.*]] ], [ -512, %[[FOR_BODY42_PREHEADER]] ]
; CHECK-NEXT:    br label %[[FOR_COND33_PREHEADER_PREHEADER]]
; CHECK:       [[FOR_BODY42_SPLIT1]]:
; CHECK-NEXT:    [[SUB51:%.*]] = add nsw i16 [[K_09]], 512
; CHECK-NEXT:    [[ARRAYIDX55:%.*]] = getelementptr inbounds [512 x [4 x i32]], ptr @b, i16 0, i16 [[SUB51]], i16 [[J_010]]
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[ARRAYIDX55]], align 1
; CHECK-NEXT:    [[ADD61:%.*]] = add i32 undef, undef
; CHECK-NEXT:    [[INC63:%.*]] = add nsw i16 [[K_09]], 1
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i16 [[K_09]], 42
; CHECK-NEXT:    br label %[[FOR_END67]]
; CHECK:       [[FOR_BODY42_SPLIT]]:
; CHECK-NEXT:    [[ADD61_LCSSA:%.*]] = phi i32 [ [[ADD61]], %[[FOR_END67]] ]
; CHECK-NEXT:    [[TMP1]] = add nsw i16 [[K_09]], 1
; CHECK-NEXT:    [[TMP2:%.*]] = icmp slt i16 [[K_09]], 42
; CHECK-NEXT:    br i1 [[TMP2]], label %[[FOR_BODY42]], label %[[FOR_END64]]
; CHECK:       [[FOR_END64]]:
; CHECK-NEXT:    [[ADD61_LCSSA_LCSSA:%.*]] = phi i32 [ [[ADD61_LCSSA]], %[[FOR_BODY42_SPLIT]] ]
; CHECK-NEXT:    store i32 [[ADD61_LCSSA_LCSSA]], ptr undef, align 1
; CHECK-NEXT:    [[INC66]] = add nuw nsw i16 [[J_010]], 1
; CHECK-NEXT:    [[CMP2:%.*]] = icmp slt i16 [[J_010]], 43
; CHECK-NEXT:    br i1 [[CMP2]], label %[[FOR_COND37_PREHEADER]], label %[[FOR_COND75_PREHEADER:.*]]
; CHECK:       [[FOR_END67]]:
; CHECK-NEXT:    [[INC69]] = add nuw nsw i16 [[I_011]], 1
; CHECK-NEXT:    [[EXITCOND13_NOT:%.*]] = icmp eq i16 [[INC69]], 2
; CHECK-NEXT:    br i1 [[EXITCOND13_NOT]], label %[[FOR_BODY42_SPLIT]], label %[[FOR_COND33_PREHEADER]]
; CHECK:       [[FOR_COND75_PREHEADER]]:
; CHECK-NEXT:    br label %[[FOR_COND75:.*]]
; CHECK:       [[FOR_COND75]]:
; CHECK-NEXT:    br label %[[FOR_COND75]]
;
entry:
  br label %for.cond33.preheader

for.cond33.preheader:                             ; preds = %for.end67, %entry
  %i.011 = phi i16 [ 0, %entry ], [ %inc69, %for.end67 ]
  br label %for.cond37.preheader

for.cond37.preheader:                             ; preds = %for.end64, %for.cond33.preheader
  %j.010 = phi i16 [ 0, %for.cond33.preheader ], [ %inc66, %for.end64 ]
  br label %for.body42

for.body42:                                       ; preds = %for.body42, %for.cond37.preheader
  %k.09 = phi i16 [ -512, %for.cond37.preheader ], [ %inc63, %for.body42 ]
  %sub51 = add nsw i16 %k.09, 512
  %arrayidx55 = getelementptr inbounds [512 x [4 x i32]], ptr @b, i16 0, i16 %sub51, i16 %j.010
  %0 = load i32, ptr %arrayidx55, align 1
  %add61 = add i32 undef, undef
  %inc63 = add nsw i16 %k.09, 1
  %cmp = icmp slt i16 %k.09, 42
  br i1 %cmp, label %for.body42, label %for.end64

for.end64:                                        ; preds = %for.body42
  store i32 %add61, ptr undef, align 1
  %inc66 = add nuw nsw i16 %j.010, 1
  %cmp2 = icmp slt i16 %j.010, 43
  br i1 %cmp2, label %for.cond37.preheader, label %for.end67

for.end67:                                        ; preds = %for.end64
  %inc69 = add nuw nsw i16 %i.011, 1
  %exitcond13.not = icmp eq i16 %inc69, 2
  br i1 %exitcond13.not, label %for.cond75, label %for.cond33.preheader

for.cond75:                                       ; preds = %for.cond75, %for.end67
  br label %for.cond75
}

; Make sure that we split the phi nodes in the middle loop header
; into a separate basic block to avoid the situation where use of
; the outermost indvar appears before its def after interchanging
; the outermost and the middle loop. Otherwise loop interchange
; would crash.

define void @test2() {
; CHECK-LABEL: define void @test2() {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br label %[[FOR_COND33_PREHEADER:.*]]
; CHECK:       [[FOR_COND33_PREHEADER_PREHEADER:.*]]:
; CHECK-NEXT:    br label %[[FOR_COND33_PREHEADER1:.*]]
; CHECK:       [[FOR_COND33_PREHEADER1]]:
; CHECK-NEXT:    [[I_166:%.*]] = phi i16 [ [[INC69:%.*]], %[[FOR_INC68:.*]] ], [ 0, %[[FOR_COND33_PREHEADER_PREHEADER]] ]
; CHECK-NEXT:    [[ARRAYIDX60:%.*]] = getelementptr inbounds [2 x [4 x i32]], ptr @c, i16 0, i16 [[I_166]], i16 [[J_165:%.*]]
; CHECK-NEXT:    br label %[[VECTOR_BODY85_SPLIT1:.*]]
; CHECK:       [[FOR_COND33_PREHEADER]]:
; CHECK-NEXT:    br label %[[FOR_COND37_PREHEADER:.*]]
; CHECK:       [[FOR_COND37_PREHEADER]]:
; CHECK-NEXT:    [[J_165]] = phi i16 [ [[INC66:%.*]], %[[MIDDLE_BLOCK80:.*]] ], [ 0, %[[FOR_COND33_PREHEADER]] ]
; CHECK-NEXT:    br label %[[VECTOR_BODY85:.*]]
; CHECK:       [[VECTOR_BODY85]]:
; CHECK-NEXT:    br label %[[VECTOR_BODY86:.*]]
; CHECK:       [[VECTOR_BODY86]]:
; CHECK-NEXT:    [[INDEX86:%.*]] = phi i16 [ 0, %[[VECTOR_BODY85]] ], [ [[TMP5:%.*]], %[[VECTOR_BODY85_SPLIT:.*]] ]
; CHECK-NEXT:    br label %[[FOR_COND33_PREHEADER_PREHEADER]]
; CHECK:       [[VECTOR_BODY85_SPLIT1]]:
; CHECK-NEXT:    [[TMP0:%.*]] = or disjoint i16 [[INDEX86]], 2
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds [512 x [4 x i32]], ptr @b, i16 0, i16 [[TMP0]], i16 [[J_165]]
; CHECK-NEXT:    [[TMP2:%.*]] = load i32, ptr [[TMP1]], align 1
; CHECK-NEXT:    [[TMP3:%.*]] = add nuw i16 [[INDEX86]], 4
; CHECK-NEXT:    [[CMP2:%.*]] = icmp slt i16 [[INDEX86]], 42
; CHECK-NEXT:    br label %[[FOR_INC68]]
; CHECK:       [[VECTOR_BODY85_SPLIT]]:
; CHECK-NEXT:    [[TMP5]] = add nuw i16 [[INDEX86]], 4
; CHECK-NEXT:    [[TMP4:%.*]] = icmp slt i16 [[INDEX86]], 42
; CHECK-NEXT:    br i1 [[TMP4]], label %[[VECTOR_BODY86]], label %[[MIDDLE_BLOCK80]]
; CHECK:       [[MIDDLE_BLOCK80]]:
; CHECK-NEXT:    [[INC66]] = add nuw nsw i16 [[J_165]], 1
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i16 [[INC66]], 42
; CHECK-NEXT:    br i1 [[CMP]], label %[[FOR_COND37_PREHEADER]], label %[[FOR_COND75_PREHEADER:.*]]
; CHECK:       [[FOR_INC68]]:
; CHECK-NEXT:    [[INC69]] = add nuw nsw i16 [[I_166]], 1
; CHECK-NEXT:    [[EXITCOND77_NOT:%.*]] = icmp slt i16 [[INC69]], 24
; CHECK-NEXT:    br i1 [[EXITCOND77_NOT]], label %[[FOR_COND33_PREHEADER1]], label %[[VECTOR_BODY85_SPLIT]]
; CHECK:       [[FOR_COND75_PREHEADER]]:
; CHECK-NEXT:    unreachable
;
entry:
  br label %for.cond33.preheader

for.cond33.preheader:                             ; preds = %for.inc68, %entry
  %i.166 = phi i16 [ %inc69, %for.inc68 ], [ 0, %entry ]
  br label %for.cond37.preheader

for.cond37.preheader:                             ; preds = %middle.block80, %for.cond33.preheader
  %j.165 = phi i16 [ 0, %for.cond33.preheader ], [ %inc66, %middle.block80 ]
  %arrayidx60 = getelementptr inbounds [2 x [4 x i32]], ptr @c, i16 0, i16 %i.166, i16 %j.165
  br label %vector.body85

vector.body85:                                    ; preds = %vector.body85, %for.cond37.preheader
  %index86 = phi i16 [ 0, %for.cond37.preheader ], [ %index.next87, %vector.body85 ]
  %0 = or disjoint i16 %index86, 2
  %1 = getelementptr inbounds [512 x [4 x i32]], ptr @b, i16 0, i16 %0, i16 %j.165
  %2 = load i32, ptr %1, align 1
  %index.next87 = add nuw i16 %index86, 4
  %cmp2 = icmp slt i16 %index86, 42
  br i1 %cmp2, label %vector.body85, label %middle.block80

middle.block80:                                   ; preds = %vector.body85
  %inc66 = add nuw nsw i16 %j.165, 1
  %cmp = icmp slt i16 %inc66, 42
  br i1 %cmp, label %for.cond37.preheader, label %for.inc68

for.inc68:                                        ; preds = %middle.block80
  %inc69 = add nuw nsw i16 %i.166, 1
  %exitcond77.not = icmp slt i16 %inc69, 24
  br i1 %exitcond77.not, label %for.cond33.preheader, label %for.cond75.preheader

for.cond75.preheader:                             ; preds = %for.inc68
  unreachable
}

; Same as test1, but with a third index on the GEP
define void @test3() {
; CHECK-LABEL: define void @test3() {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br label %[[FOR_COND37_PREHEADER_PREHEADER:.*]]
; CHECK:       [[FOR_COND33_PREHEADER_PREHEADER:.*]]:
; CHECK-NEXT:    br label %[[FOR_COND33_PREHEADER:.*]]
; CHECK:       [[FOR_COND33_PREHEADER]]:
; CHECK-NEXT:    [[I_011:%.*]] = phi i16 [ [[INC69:%.*]], %[[FOR_END67:.*]] ], [ 0, %[[FOR_COND33_PREHEADER_PREHEADER]] ]
; CHECK-NEXT:    br label %[[FOR_BODY42_SPLIT1:.*]]
; CHECK:       [[FOR_BODY42_PREHEADER:.*]]:
; CHECK-NEXT:    br label %[[FOR_BODY42:.*]]
; CHECK:       [[FOR_COND38_PREHEADER_PREHEADER:.*]]:
; CHECK-NEXT:    br label %[[FOR_COND38_PREHEADER:.*]]
; CHECK:       [[FOR_COND37_PREHEADER_PREHEADER]]:
; CHECK-NEXT:    br label %[[FOR_COND37_PREHEADER:.*]]
; CHECK:       [[FOR_COND37_PREHEADER]]:
; CHECK-NEXT:    [[J_010:%.*]] = phi i16 [ [[INC66:%.*]], %[[FOR_END64:.*]] ], [ 0, %[[FOR_COND37_PREHEADER_PREHEADER]] ]
; CHECK-NEXT:    br label %[[FOR_COND38_PREHEADER_PREHEADER]]
; CHECK:       [[FOR_COND38_PREHEADER]]:
; CHECK-NEXT:    [[K_010:%.*]] = phi i16 [ [[INC67:%.*]], %[[FOR_END65:.*]] ], [ 0, %[[FOR_COND38_PREHEADER_PREHEADER]] ]
; CHECK-NEXT:    br label %[[FOR_BODY42_PREHEADER]]
; CHECK:       [[FOR_BODY42]]:
; CHECK-NEXT:    [[K_09:%.*]] = phi i16 [ [[TMP3:%.*]], %[[FOR_BODY42_SPLIT:.*]] ], [ -512, %[[FOR_BODY42_PREHEADER]] ]
; CHECK-NEXT:    br label %[[FOR_COND33_PREHEADER_PREHEADER]]
; CHECK:       [[FOR_BODY42_SPLIT1]]:
; CHECK-NEXT:    [[SUB51:%.*]] = add nsw i16 [[K_09]], 512
; CHECK-NEXT:    [[ARRAYIDX55:%.*]] = getelementptr inbounds [1024 x [512 x [4 x i32]]], ptr @d, i16 0, i16 [[SUB51]], i16 [[J_010]], i16 [[K_010]]
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[ARRAYIDX55]], align 1
; CHECK-NEXT:    [[ADD61:%.*]] = add i32 undef, undef
; CHECK-NEXT:    [[TMP1:%.*]] = add nsw i16 [[K_09]], 1
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i16 [[K_09]], 42
; CHECK-NEXT:    br label %[[FOR_END67]]
; CHECK:       [[FOR_BODY42_SPLIT]]:
; CHECK-NEXT:    [[ADD61_LCSSA:%.*]] = phi i32 [ [[ADD61]], %[[FOR_END67]] ]
; CHECK-NEXT:    [[TMP3]] = add nsw i16 [[K_09]], 1
; CHECK-NEXT:    [[TMP2:%.*]] = icmp slt i16 [[K_09]], 42
; CHECK-NEXT:    br i1 [[TMP2]], label %[[FOR_BODY42]], label %[[FOR_END65]]
; CHECK:       [[FOR_END65]]:
; CHECK-NEXT:    [[ADD61_LCSSA_LCSSA:%.*]] = phi i32 [ [[ADD61_LCSSA]], %[[FOR_BODY42_SPLIT]] ]
; CHECK-NEXT:    store i32 [[ADD61_LCSSA_LCSSA]], ptr undef, align 1
; CHECK-NEXT:    [[INC67]] = add nuw nsw i16 [[K_010]], 1
; CHECK-NEXT:    [[CMP3:%.*]] = icmp slt i16 [[K_010]], 44
; CHECK-NEXT:    br i1 [[CMP3]], label %[[FOR_COND38_PREHEADER]], label %[[FOR_END64]]
; CHECK:       [[FOR_END64]]:
; CHECK-NEXT:    [[INC66]] = add nuw nsw i16 [[J_010]], 1
; CHECK-NEXT:    [[CMP2:%.*]] = icmp slt i16 [[J_010]], 43
; CHECK-NEXT:    br i1 [[CMP2]], label %[[FOR_COND37_PREHEADER]], label %[[FOR_COND75_PREHEADER:.*]]
; CHECK:       [[FOR_END67]]:
; CHECK-NEXT:    [[INC69]] = add nuw nsw i16 [[I_011]], 1
; CHECK-NEXT:    [[EXITCOND13_NOT:%.*]] = icmp eq i16 [[INC69]], 2
; CHECK-NEXT:    br i1 [[EXITCOND13_NOT]], label %[[FOR_BODY42_SPLIT]], label %[[FOR_COND33_PREHEADER]]
; CHECK:       [[FOR_COND75_PREHEADER]]:
; CHECK-NEXT:    br label %[[FOR_COND75:.*]]
; CHECK:       [[FOR_COND75]]:
; CHECK-NEXT:    br label %[[FOR_COND75]]
;
entry:
  br label %for.cond33.preheader

for.cond33.preheader:                             ; preds = %for.end67, %entry
  %i.011 = phi i16 [ 0, %entry ], [ %inc69, %for.end67 ]
  br label %for.cond37.preheader

for.cond37.preheader:                             ; preds = %for.end64, %for.cond33.preheader
  %j.010 = phi i16 [ 0, %for.cond33.preheader ], [ %inc66, %for.end64 ]
  br label %for.cond38.preheader

for.cond38.preheader:                             ; preds = %for.end65, %for.cond37.preheader
  %k.010 = phi i16 [ 0, %for.cond37.preheader ], [ %inc67, %for.end65 ]
  br label %for.body42

for.body42:                                       ; preds = %for.body42, %for.cond38.preheader
  %k.09 = phi i16 [ -512, %for.cond38.preheader ], [ %inc63, %for.body42 ]
  %sub51 = add nsw i16 %k.09, 512
  %arrayidx55 = getelementptr inbounds [1024 x [512 x [4 x i32]]], ptr @d, i16 0, i16 %sub51, i16 %j.010, i16 %k.010
  %0 = load i32, ptr %arrayidx55, align 1
  %add61 = add i32 undef, undef
  %inc63 = add nsw i16 %k.09, 1
  %cmp = icmp slt i16 %k.09, 42
  br i1 %cmp, label %for.body42, label %for.end65

for.end65:                                        ; preds = %for.body42
  store i32 %add61, ptr undef, align 1
  %inc67 = add nuw nsw i16 %k.010, 1
  %cmp3 = icmp slt i16 %k.010, 44
  br i1 %cmp3, label %for.cond38.preheader, label %for.end64

for.end64:                                        ; preds = %for.end65
  %inc66 = add nuw nsw i16 %j.010, 1
  %cmp2 = icmp slt i16 %j.010, 43
  br i1 %cmp2, label %for.cond37.preheader, label %for.end67

for.end67:                                        ; preds = %for.end64
  %inc69 = add nuw nsw i16 %i.011, 1
  %exitcond13.not = icmp eq i16 %inc69, 2
  br i1 %exitcond13.not, label %for.cond75, label %for.cond33.preheader

for.cond75:                                       ; preds = %for.cond75, %for.end67
  br label %for.cond75
}