llvm/test/Transforms/LoopFusion/sunk-phi-nodes.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -passes=loop-fusion -S < %s 2>&1 | FileCheck %s
define dso_local i32 @check_sunk_phi_nodes() {
; CHECK-LABEL: define dso_local i32 @check_sunk_phi_nodes() {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    br label %[[FOR_BODY:.*]]
; CHECK:       [[FOR_BODY]]:
; CHECK-NEXT:    [[SUM1_02:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[ADD:%.*]], %[[FOR_INC6:.*]] ]
; CHECK-NEXT:    [[I_01:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[INC:%.*]], %[[FOR_INC6]] ]
; CHECK-NEXT:    [[I1_04:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[INC7:%.*]], %[[FOR_INC6]] ]
; CHECK-NEXT:    [[SUM2_03:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[ADD5:%.*]], %[[FOR_INC6]] ]
; CHECK-NEXT:    [[ADD]] = add nsw i32 [[SUM1_02]], [[I_01]]
; CHECK-NEXT:    br label %[[FOR_INC:.*]]
; CHECK:       [[FOR_INC]]:
; CHECK-NEXT:    [[MUL:%.*]] = mul nsw i32 [[I1_04]], [[I1_04]]
; CHECK-NEXT:    [[ADD5]] = add nsw i32 [[SUM2_03]], [[MUL]]
; CHECK-NEXT:    br label %[[FOR_INC6]]
; CHECK:       [[FOR_INC6]]:
; CHECK-NEXT:    [[INC]] = add nsw i32 [[I_01]], 1
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[INC]], 10
; CHECK-NEXT:    [[INC7]] = add nsw i32 [[I1_04]], 1
; CHECK-NEXT:    [[CMP3:%.*]] = icmp slt i32 [[INC7]], 10
; CHECK-NEXT:    br i1 [[CMP3]], label %[[FOR_BODY]], label %[[FOR_END8:.*]]
; CHECK:       [[FOR_END8]]:
; CHECK-NEXT:    [[SUM2_0_LCSSA:%.*]] = phi i32 [ [[ADD5]], %[[FOR_INC6]] ]
; CHECK-NEXT:    [[SUM1_0_LCSSA:%.*]] = phi i32 [ [[ADD]], %[[FOR_INC6]] ]
; CHECK-NEXT:    [[TMP0:%.*]] = add i32 [[SUM1_0_LCSSA]], [[SUM2_0_LCSSA]]
; CHECK-NEXT:    ret i32 [[TMP0]]
;
entry:
  br label %for.body

for.body:                                         ; preds = %entry, %for.inc
  %sum1.02 = phi i32 [ 0, %entry ], [ %add, %for.inc ]
  %i.01 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
  %add = add nsw i32 %sum1.02, %i.01
  br label %for.inc

for.inc:                                          ; preds = %for.body
  %inc = add nsw i32 %i.01, 1
  %cmp = icmp slt i32 %inc, 10
  br i1 %cmp, label %for.body, label %for.end

for.end:                                          ; preds = %for.inc
  %sum1.0.lcssa = phi i32 [ %add, %for.inc ]
  br label %for.body4

for.body4:                                        ; preds = %for.end, %for.inc6
  %i1.04 = phi i32 [ 0, %for.end ], [ %inc7, %for.inc6 ]
  %sum2.03 = phi i32 [ 0, %for.end ], [ %add5, %for.inc6 ]
  %mul = mul nsw i32 %i1.04, %i1.04
  %add5 = add nsw i32 %sum2.03, %mul
  br label %for.inc6

for.inc6:                                         ; preds = %for.body4
  %inc7 = add nsw i32 %i1.04, 1
  %cmp3 = icmp slt i32 %inc7, 10
  br i1 %cmp3, label %for.body4, label %for.end8

for.end8:                                         ; preds = %for.inc6
  %sum2.0.lcssa = phi i32 [ %add5, %for.inc6 ]
  %0 = add i32 %sum1.0.lcssa, %sum2.0.lcssa
  ret i32 %0
}