llvm/test/Transforms/LoopVectorize/predicator.ll - llvm-project - Git at Google


            
            ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --version 6

            
            ; RUN: opt < %s -S -p loop-vectorize -force-vector-width=4 -force-target-supports-masked-memory-ops | FileCheck %s


            define void @diamond_phi2(ptr %a, i1 %c1, i1 %c2) {

            
            ; CHECK-LABEL: define void @diamond_phi2(

            
            ; CHECK-SAME: ptr [[A:%.*]], i1 [[C1:%.*]], i1 [[C2:%.*]]) {

            
            ; CHECK-NEXT:  [[ENTRY:.*:]]

            
            ; CHECK-NEXT:    br label %[[VECTOR_PH:.*]]

            
            ; CHECK:       [[VECTOR_PH]]:

            
            ; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i1> poison, i1 [[C2]], i64 0

            
            ; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT]], <4 x i1> poison, <4 x i32> zeroinitializer

            
            ; CHECK-NEXT:    [[BROADCAST_SPLATINSERT1:%.*]] = insertelement <4 x i1> poison, i1 [[C1]], i64 0

            
            ; CHECK-NEXT:    [[BROADCAST_SPLAT2:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT1]], <4 x i1> poison, <4 x i32> zeroinitializer

            
            ; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]

            
            ; CHECK:       [[VECTOR_BODY]]:

            
            ; CHECK-NEXT:    [[TMP20:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]

            
            ; CHECK-NEXT:    [[VEC_IND:%.*]] = phi <4 x i64> [ <i64 0, i64 1, i64 2, i64 3>, %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[VECTOR_BODY]] ]

            
            ; CHECK-NEXT:    [[TMP0:%.*]] = icmp sle <4 x i64> [[VEC_IND]], zeroinitializer

            
            ; CHECK-NEXT:    [[TMP1:%.*]] = xor <4 x i1> [[TMP0]], splat (i1 true)

            
            ; CHECK-NEXT:    [[TMP2:%.*]] = add <4 x i64> [[VEC_IND]], splat (i64 2)

            
            ; CHECK-NEXT:    [[TMP3:%.*]] = add <4 x i64> [[VEC_IND]], splat (i64 1)

            
            ; CHECK-NEXT:    [[TMP4:%.*]] = select <4 x i1> [[TMP1]], <4 x i1> [[BROADCAST_SPLAT]], <4 x i1> zeroinitializer

            
            ; CHECK-NEXT:    [[TMP5:%.*]] = select <4 x i1> [[TMP0]], <4 x i1> [[BROADCAST_SPLAT2]], <4 x i1> zeroinitializer

            
            ; CHECK-NEXT:    [[TMP6:%.*]] = or <4 x i1> [[TMP4]], [[TMP5]]

            
            ; CHECK-NEXT:    [[PREDPHI:%.*]] = select <4 x i1> [[TMP5]], <4 x i64> [[TMP3]], <4 x i64> [[TMP2]]

            
            ; CHECK-NEXT:    [[TMP21:%.*]] = getelementptr i64, ptr [[A]], i64 [[TMP20]]

            
            ; CHECK-NEXT:    call void @llvm.masked.store.v4i64.p0(<4 x i64> [[PREDPHI]], ptr align 4 [[TMP21]], <4 x i1> [[TMP6]])

            
            ; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[TMP20]], 4

            
            ; CHECK-NEXT:    [[VEC_IND_NEXT]] = add nuw nsw <4 x i64> [[VEC_IND]], splat (i64 4)

            
            ; CHECK-NEXT:    [[TMP23:%.*]] = icmp eq i64 [[INDEX_NEXT]], 128

            
            ; CHECK-NEXT:    br i1 [[TMP23]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]

            
            ; CHECK:       [[MIDDLE_BLOCK]]:

            
            ; CHECK-NEXT:    br label %[[EXIT:.*]]

            
            ; CHECK:       [[EXIT]]:

            
            ; CHECK-NEXT:    ret void

            
            ;

            
            entry:

            
              br label %bb0


            bb0:

            
            ;          bb0

            
            ;         /  \

            
            ;       bb1  bb2

            
            ;       | \  / |

            
            ;       |  bb4 |

            
            ;        \  | /

            
            ;          bb5

            
            ; The blend masks for %phi in bb4 should be:

            
            ; bb1 := bb0->bb1 := c0

            
            ; bb2 := bb0->bb2 := !c0

            
              %iv = phi i64 [0, %entry], [%iv.next, %bb5]

            
              %c0 = icmp sle i64 %iv, 0

            
              br i1 %c0, label %bb1, label %bb2


            bb1:

            
              %add1 = add i64 %iv, 1

            
              br i1 %c1, label %bb4, label %bb5


            bb2:

            
              %add2 = add i64 %iv, 2

            
              br i1 %c2, label %bb4, label %bb5


            bb4:

            
              %phi = phi i64 [%add1, %bb1], [%add2, %bb2]

            
              %gep = getelementptr i64, ptr %a, i64 %iv

            
              store i64 %phi, ptr %gep

            
              br label %bb5


            bb5:

            
              %iv.next = add nsw nuw i64 %iv, 1

            
              %ec = icmp eq i64 %iv.next, 128

            
              br i1 %ec, label %exit, label %bb0


            exit:

            
              ret void

            
            }


            define void @blend_masks(ptr noalias %p, i1 %c0, i1 %c1, i1 %c3, i1 %c4, i1 %c6) {

            
            ; CHECK-LABEL: define void @blend_masks(

            
            ; CHECK-SAME: ptr noalias [[P:%.*]], i1 [[C0:%.*]], i1 [[C1:%.*]], i1 [[C3:%.*]], i1 [[C4:%.*]], i1 [[C6:%.*]]) {

            
            ; CHECK-NEXT:  [[ENTRY:.*:]]

            
            ; CHECK-NEXT:    br label %[[VECTOR_PH:.*]]

            
            ; CHECK:       [[VECTOR_PH]]:

            
            ; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i1> poison, i1 [[C3]], i64 0

            
            ; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT]], <4 x i1> poison, <4 x i32> zeroinitializer

            
            ; CHECK-NEXT:    [[BROADCAST_SPLATINSERT1:%.*]] = insertelement <4 x i1> poison, i1 [[C6]], i64 0

            
            ; CHECK-NEXT:    [[BROADCAST_SPLAT2:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT1]], <4 x i1> poison, <4 x i32> zeroinitializer

            
            ; CHECK-NEXT:    [[BROADCAST_SPLATINSERT3:%.*]] = insertelement <4 x i1> poison, i1 [[C4]], i64 0

            
            ; CHECK-NEXT:    [[BROADCAST_SPLAT4:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT3]], <4 x i1> poison, <4 x i32> zeroinitializer

            
            ; CHECK-NEXT:    [[BROADCAST_SPLATINSERT5:%.*]] = insertelement <4 x i1> poison, i1 [[C1]], i64 0

            
            ; CHECK-NEXT:    [[BROADCAST_SPLAT6:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT5]], <4 x i1> poison, <4 x i32> zeroinitializer

            
            ; CHECK-NEXT:    [[BROADCAST_SPLATINSERT7:%.*]] = insertelement <4 x i1> poison, i1 [[C0]], i64 0

            
            ; CHECK-NEXT:    [[BROADCAST_SPLAT8:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT7]], <4 x i1> poison, <4 x i32> zeroinitializer

            
            ; CHECK-NEXT:    [[TMP0:%.*]] = xor <4 x i1> [[BROADCAST_SPLAT8]], splat (i1 true)

            
            ; CHECK-NEXT:    [[TMP1:%.*]] = xor <4 x i1> [[BROADCAST_SPLAT6]], splat (i1 true)

            
            ; CHECK-NEXT:    [[TMP2:%.*]] = select <4 x i1> [[BROADCAST_SPLAT8]], <4 x i1> [[TMP1]], <4 x i1> zeroinitializer

            
            ; CHECK-NEXT:    [[TMP3:%.*]] = xor <4 x i1> [[BROADCAST_SPLAT4]], splat (i1 true)

            
            ; CHECK-NEXT:    [[TMP4:%.*]] = select <4 x i1> [[TMP2]], <4 x i1> [[TMP3]], <4 x i1> zeroinitializer

            
            ; CHECK-NEXT:    [[TMP5:%.*]] = or <4 x i1> [[TMP4]], [[TMP0]]

            
            ; CHECK-NEXT:    [[TMP6:%.*]] = select <4 x i1> [[BROADCAST_SPLAT8]], <4 x i1> [[BROADCAST_SPLAT6]], <4 x i1> zeroinitializer

            
            ; CHECK-NEXT:    [[TMP7:%.*]] = select <4 x i1> [[TMP2]], <4 x i1> [[BROADCAST_SPLAT4]], <4 x i1> zeroinitializer

            
            ; CHECK-NEXT:    [[TMP8:%.*]] = xor <4 x i1> [[BROADCAST_SPLAT]], splat (i1 true)

            
            ; CHECK-NEXT:    [[TMP9:%.*]] = select <4 x i1> [[TMP6]], <4 x i1> [[TMP8]], <4 x i1> zeroinitializer

            
            ; CHECK-NEXT:    [[TMP10:%.*]] = or <4 x i1> [[TMP7]], [[TMP9]]

            
            ; CHECK-NEXT:    [[TMP11:%.*]] = select <4 x i1> [[TMP5]], <4 x i1> [[BROADCAST_SPLAT2]], <4 x i1> zeroinitializer

            
            ; CHECK-NEXT:    [[TMP12:%.*]] = or <4 x i1> [[TMP11]], [[TMP10]]

            
            ; CHECK-NEXT:    [[PREDPHI:%.*]] = select <4 x i1> [[TMP10]], <4 x i32> zeroinitializer, <4 x i32> splat (i32 1)

            
            ; CHECK-NEXT:    br label %[[PRED_STORE_CONTINUE12:.*]]

            
            ; CHECK:       [[PRED_STORE_CONTINUE12]]:

            
            ; CHECK-NEXT:    [[TMP26:%.*]] = phi i32 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[PRED_STORE_CONTINUE12]] ]

            
            ; CHECK-NEXT:    [[TMP27:%.*]] = getelementptr i32, ptr [[P]], i32 [[TMP26]]

            
            ; CHECK-NEXT:    call void @llvm.masked.store.v4i32.p0(<4 x i32> [[PREDPHI]], ptr align 4 [[TMP27]], <4 x i1> [[TMP12]])

            
            ; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[TMP26]], 4

            
            ; CHECK-NEXT:    [[TMP29:%.*]] = icmp eq i32 [[INDEX_NEXT]], 128

            
            ; CHECK-NEXT:    br i1 [[TMP29]], label %[[MIDDLE_BLOCK:.*]], label %[[PRED_STORE_CONTINUE12]], !llvm.loop [[LOOP3:![0-9]+]]

            
            ; CHECK:       [[MIDDLE_BLOCK]]:

            
            ; CHECK-NEXT:    br label %[[EXIT:.*]]

            
            ; CHECK:       [[EXIT]]:

            
            ; CHECK-NEXT:    ret void

            
            ;

            
            entry:

            
              br label %bb0


            bb0:

            
            ;        bb0

            
            ;       /   \

            
            ;      bb1   bb2

            
            ;     /  \     |

            
            ;    bb3  bb4  |

            
            ;   / \  / \   /

            
            ;   \ bb5   bb6

            
            ;    \  \  / /

            
            ;     \ bb7 /

            
            ;      \ | /

            
            ;       bb8

            
            ; The blend masks for %phi in bb7 should be:

            
            ; bb5 := bb1->bb3 v bb4->bb5 := (c0 && c1) || (c0 && !c1 && c4)

            
            ; bb6 := bb4->bb6 v bb0->bb2 := (c0 && !c1 && !c4) || !c1

            
              %iv = phi i32 [0, %entry], [%iv.next, %bb8]

            
              br i1 %c0, label %bb1, label %bb2


            bb1:

            
              br i1 %c1, label %bb3, label %bb4


            bb2:

            
              br label %bb6


            bb3:

            
              br i1 %c3, label %bb8, label %bb5


            bb4:

            
              br i1 %c4, label %bb5, label %bb6


            bb5:

            
              br label %bb7


            bb6:

            
              br i1 %c6, label %bb7, label %bb8


            bb7:

            
              %phi = phi i32 [0, %bb5], [1, %bb6]

            
              %gep = getelementptr i32, ptr %p, i32 %iv

            
              store i32 %phi, ptr %gep

            
              br label %bb8


            bb8:

            
              %iv.next = add i32 %iv, 1

            
              %ec = icmp eq i32 %iv.next, 128

            
              br i1 %ec, label %exit, label %bb0


            exit:

            
              ret void

            
            }


            define void @blend_masks_triangle_phi(ptr noalias %p, i1 %c0, i1 %c1) {

            
            ; CHECK-LABEL: define void @blend_masks_triangle_phi(

            
            ; CHECK-SAME: ptr noalias [[P:%.*]], i1 [[C0:%.*]], i1 [[C1:%.*]]) {

            
            ; CHECK-NEXT:  [[ENTRY:.*:]]

            
            ; CHECK-NEXT:    br label %[[VECTOR_PH:.*]]

            
            ; CHECK:       [[VECTOR_PH]]:

            
            ; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i1> poison, i1 [[C1]], i64 0

            
            ; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT]], <4 x i1> poison, <4 x i32> zeroinitializer

            
            ; CHECK-NEXT:    [[BROADCAST_SPLATINSERT1:%.*]] = insertelement <4 x i1> poison, i1 [[C0]], i64 0

            
            ; CHECK-NEXT:    [[BROADCAST_SPLAT2:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT1]], <4 x i1> poison, <4 x i32> zeroinitializer

            
            ; CHECK-NEXT:    [[TMP0:%.*]] = select <4 x i1> [[BROADCAST_SPLAT2]], <4 x i1> [[BROADCAST_SPLAT]], <4 x i1> zeroinitializer

            
            ; CHECK-NEXT:    [[PREDPHI:%.*]] = select <4 x i1> [[TMP0]], <4 x i32> zeroinitializer, <4 x i32> splat (i32 1)

            
            ; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]

            
            ; CHECK:       [[VECTOR_BODY]]:

            
            ; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]

            
            ; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr i32, ptr [[P]], i32 [[INDEX]]

            
            ; CHECK-NEXT:    store <4 x i32> [[PREDPHI]], ptr [[TMP1]], align 4

            
            ; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4

            
            ; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[INDEX_NEXT]], 128

            
            ; CHECK-NEXT:    br i1 [[TMP2]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]

            
            ; CHECK:       [[MIDDLE_BLOCK]]:

            
            ; CHECK-NEXT:    br label %[[EXIT:.*]]

            
            ; CHECK:       [[EXIT]]:

            
            ; CHECK-NEXT:    ret void

            
            ;

            
            entry:

            
              br label %bb0


            bb0:

            
            ;          bb0

            
            ;         /  |

            
            ;       bb1  |

            
            ;       |  \ |

            
            ;       |  bb2

            
            ;       |  /

            
            ;       bb3

            
            ; The blend masks for %phi in bb3 should be:

            
            ; bb0 := bb1->bb2 v bb0->bb2 := c0 && !c1 || !c0

            
            ; bb1 := bb1->bb3 := c0 && c1

            
              %iv = phi i32 [0, %entry], [%iv.next, %bb3]

            
              br i1 %c0, label %bb1, label %bb2


            bb1:

            
              br i1 %c1, label %bb3, label %bb2


            bb2:

            
              br label %bb3


            bb3:

            
              %phi = phi i32 [0, %bb1], [1, %bb2]

            
              %gep = getelementptr i32, ptr %p, i32 %iv

            
              store i32 %phi, ptr %gep

            
              %iv.next = add i32 %iv, 1

            
              %ec = icmp eq i32 %iv.next, 128

            
              br i1 %ec, label %exit, label %bb0


            exit:

            
              ret void

            
            }


            define void @simplifiable_blend(i1 %c1, i1 %c2, i1 %c3, i32 %x, i32 %y, ptr %p) {

            
            ; CHECK-LABEL: define void @simplifiable_blend(

            
            ; CHECK-SAME: i1 [[C1:%.*]], i1 [[C2:%.*]], i1 [[C3:%.*]], i32 [[X:%.*]], i32 [[Y:%.*]], ptr [[P:%.*]]) {

            
            ; CHECK-NEXT:  [[ENTRY:.*:]]

            
            ; CHECK-NEXT:    br label %[[VECTOR_PH:.*]]

            
            ; CHECK:       [[VECTOR_PH]]:

            
            ; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i32> poison, i32 [[Y]], i64 0

            
            ; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i32> [[BROADCAST_SPLATINSERT]], <4 x i32> poison, <4 x i32> zeroinitializer

            
            ; CHECK-NEXT:    [[BROADCAST_SPLATINSERT1:%.*]] = insertelement <4 x i32> poison, i32 [[X]], i64 0

            
            ; CHECK-NEXT:    [[BROADCAST_SPLAT2:%.*]] = shufflevector <4 x i32> [[BROADCAST_SPLATINSERT1]], <4 x i32> poison, <4 x i32> zeroinitializer

            
            ; CHECK-NEXT:    [[PREDPHI7:%.*]] = select i1 [[C1]], <4 x i32> [[BROADCAST_SPLAT2]], <4 x i32> [[BROADCAST_SPLAT]]

            
            ; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]

            
            ; CHECK:       [[VECTOR_BODY]]:

            
            ; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]

            
            ; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr i32, ptr [[P]], i32 [[INDEX]]

            
            ; CHECK-NEXT:    store <4 x i32> [[PREDPHI7]], ptr [[TMP3]], align 4

            
            ; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4

            
            ; CHECK-NEXT:    [[TMP4:%.*]] = icmp eq i32 [[INDEX_NEXT]], 128

            
            ; CHECK-NEXT:    br i1 [[TMP4]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]

            
            ; CHECK:       [[MIDDLE_BLOCK]]:

            
            ; CHECK-NEXT:    br label %[[EXIT:.*]]

            
            ; CHECK:       [[EXIT]]:

            
            ; CHECK-NEXT:    ret void

            
            ;

            
            entry:

            
              br label %loop


            loop:

            
              %iv = phi i32 [0, %entry], [%iv.next, %latch]

            
              br i1 %c1, label %A, label %B


            A:

            
              br i1 %c2, label %C, label %D


            B:

            
              br i1 %c3, label %F, label %E


            C:

            
              br label %latch


            D:

            
              br label %latch


            E:

            
              br label %F


            F:

            
              br label %latch


            latch:

            
              %phi = phi i32 [ %x, %C ], [ %x, %D ], [ %y, %F ]

            
              %gep = getelementptr i32, ptr %p, i32 %iv

            
              store i32 %phi, ptr %gep

            
              %iv.next = add i32 %iv, 1

            
              %ec = icmp eq i32 %iv.next, 128

            
              br i1 %ec, label %exit, label %loop


            exit:

            
              ret void

            
            }
	; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --version 6
	; RUN: opt < %s -S -p loop-vectorize -force-vector-width=4 -force-target-supports-masked-memory-ops \| FileCheck %s

	define void @diamond_phi2(ptr %a, i1 %c1, i1 %c2) {
	; CHECK-LABEL: define void @diamond_phi2(
	; CHECK-SAME: ptr [[A:%.]], i1 [[C1:%.]], i1 [[C2:%.*]]) {
	; CHECK-NEXT: [[ENTRY:.*:]]
	; CHECK-NEXT: br label %[[VECTOR_PH:.*]]
	; CHECK: [[VECTOR_PH]]:
	; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i1> poison, i1 [[C2]], i64 0
	; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT]], <4 x i1> poison, <4 x i32> zeroinitializer
	; CHECK-NEXT: [[BROADCAST_SPLATINSERT1:%.*]] = insertelement <4 x i1> poison, i1 [[C1]], i64 0
	; CHECK-NEXT: [[BROADCAST_SPLAT2:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT1]], <4 x i1> poison, <4 x i32> zeroinitializer
	; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
	; CHECK: [[VECTOR_BODY]]:
	; CHECK-NEXT: [[TMP20:%.]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.]], %[[VECTOR_BODY]] ]
	; CHECK-NEXT: [[VEC_IND:%.]] = phi <4 x i64> [ <i64 0, i64 1, i64 2, i64 3>, %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.]], %[[VECTOR_BODY]] ]
	; CHECK-NEXT: [[TMP0:%.*]] = icmp sle <4 x i64> [[VEC_IND]], zeroinitializer
	; CHECK-NEXT: [[TMP1:%.*]] = xor <4 x i1> [[TMP0]], splat (i1 true)
	; CHECK-NEXT: [[TMP2:%.*]] = add <4 x i64> [[VEC_IND]], splat (i64 2)
	; CHECK-NEXT: [[TMP3:%.*]] = add <4 x i64> [[VEC_IND]], splat (i64 1)
	; CHECK-NEXT: [[TMP4:%.*]] = select <4 x i1> [[TMP1]], <4 x i1> [[BROADCAST_SPLAT]], <4 x i1> zeroinitializer
	; CHECK-NEXT: [[TMP5:%.*]] = select <4 x i1> [[TMP0]], <4 x i1> [[BROADCAST_SPLAT2]], <4 x i1> zeroinitializer
	; CHECK-NEXT: [[TMP6:%.*]] = or <4 x i1> [[TMP4]], [[TMP5]]
	; CHECK-NEXT: [[PREDPHI:%.*]] = select <4 x i1> [[TMP5]], <4 x i64> [[TMP3]], <4 x i64> [[TMP2]]
	; CHECK-NEXT: [[TMP21:%.*]] = getelementptr i64, ptr [[A]], i64 [[TMP20]]
	; CHECK-NEXT: call void @llvm.masked.store.v4i64.p0(<4 x i64> [[PREDPHI]], ptr align 4 [[TMP21]], <4 x i1> [[TMP6]])
	; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[TMP20]], 4
	; CHECK-NEXT: [[VEC_IND_NEXT]] = add nuw nsw <4 x i64> [[VEC_IND]], splat (i64 4)
	; CHECK-NEXT: [[TMP23:%.*]] = icmp eq i64 [[INDEX_NEXT]], 128
	; CHECK-NEXT: br i1 [[TMP23]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
	; CHECK: [[MIDDLE_BLOCK]]:
	; CHECK-NEXT: br label %[[EXIT:.*]]
	; CHECK: [[EXIT]]:
	; CHECK-NEXT: ret void
	;
	entry:
	br label %bb0

	bb0:
	; bb0
	; / \
	; bb1 bb2
	; \| \ / \|
	; \| bb4 \|
	; \ \| /
	; bb5
	; The blend masks for %phi in bb4 should be:
	; bb1 := bb0->bb1 := c0
	; bb2 := bb0->bb2 := !c0
	%iv = phi i64 [0, %entry], [%iv.next, %bb5]
	%c0 = icmp sle i64 %iv, 0
	br i1 %c0, label %bb1, label %bb2

	bb1:
	%add1 = add i64 %iv, 1
	br i1 %c1, label %bb4, label %bb5

	bb2:
	%add2 = add i64 %iv, 2
	br i1 %c2, label %bb4, label %bb5

	bb4:
	%phi = phi i64 [%add1, %bb1], [%add2, %bb2]
	%gep = getelementptr i64, ptr %a, i64 %iv
	store i64 %phi, ptr %gep
	br label %bb5

	bb5:
	%iv.next = add nsw nuw i64 %iv, 1
	%ec = icmp eq i64 %iv.next, 128
	br i1 %ec, label %exit, label %bb0

	exit:
	ret void
	}

	define void @blend_masks(ptr noalias %p, i1 %c0, i1 %c1, i1 %c3, i1 %c4, i1 %c6) {
	; CHECK-LABEL: define void @blend_masks(
	; CHECK-SAME: ptr noalias [[P:%.]], i1 [[C0:%.]], i1 [[C1:%.]], i1 [[C3:%.]], i1 [[C4:%.]], i1 [[C6:%.]]) {
	; CHECK-NEXT: [[ENTRY:.*:]]
	; CHECK-NEXT: br label %[[VECTOR_PH:.*]]
	; CHECK: [[VECTOR_PH]]:
	; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i1> poison, i1 [[C3]], i64 0
	; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT]], <4 x i1> poison, <4 x i32> zeroinitializer
	; CHECK-NEXT: [[BROADCAST_SPLATINSERT1:%.*]] = insertelement <4 x i1> poison, i1 [[C6]], i64 0
	; CHECK-NEXT: [[BROADCAST_SPLAT2:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT1]], <4 x i1> poison, <4 x i32> zeroinitializer
	; CHECK-NEXT: [[BROADCAST_SPLATINSERT3:%.*]] = insertelement <4 x i1> poison, i1 [[C4]], i64 0
	; CHECK-NEXT: [[BROADCAST_SPLAT4:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT3]], <4 x i1> poison, <4 x i32> zeroinitializer
	; CHECK-NEXT: [[BROADCAST_SPLATINSERT5:%.*]] = insertelement <4 x i1> poison, i1 [[C1]], i64 0
	; CHECK-NEXT: [[BROADCAST_SPLAT6:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT5]], <4 x i1> poison, <4 x i32> zeroinitializer
	; CHECK-NEXT: [[BROADCAST_SPLATINSERT7:%.*]] = insertelement <4 x i1> poison, i1 [[C0]], i64 0
	; CHECK-NEXT: [[BROADCAST_SPLAT8:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT7]], <4 x i1> poison, <4 x i32> zeroinitializer
	; CHECK-NEXT: [[TMP0:%.*]] = xor <4 x i1> [[BROADCAST_SPLAT8]], splat (i1 true)
	; CHECK-NEXT: [[TMP1:%.*]] = xor <4 x i1> [[BROADCAST_SPLAT6]], splat (i1 true)
	; CHECK-NEXT: [[TMP2:%.*]] = select <4 x i1> [[BROADCAST_SPLAT8]], <4 x i1> [[TMP1]], <4 x i1> zeroinitializer
	; CHECK-NEXT: [[TMP3:%.*]] = xor <4 x i1> [[BROADCAST_SPLAT4]], splat (i1 true)
	; CHECK-NEXT: [[TMP4:%.*]] = select <4 x i1> [[TMP2]], <4 x i1> [[TMP3]], <4 x i1> zeroinitializer
	; CHECK-NEXT: [[TMP5:%.*]] = or <4 x i1> [[TMP4]], [[TMP0]]
	; CHECK-NEXT: [[TMP6:%.*]] = select <4 x i1> [[BROADCAST_SPLAT8]], <4 x i1> [[BROADCAST_SPLAT6]], <4 x i1> zeroinitializer
	; CHECK-NEXT: [[TMP7:%.*]] = select <4 x i1> [[TMP2]], <4 x i1> [[BROADCAST_SPLAT4]], <4 x i1> zeroinitializer
	; CHECK-NEXT: [[TMP8:%.*]] = xor <4 x i1> [[BROADCAST_SPLAT]], splat (i1 true)
	; CHECK-NEXT: [[TMP9:%.*]] = select <4 x i1> [[TMP6]], <4 x i1> [[TMP8]], <4 x i1> zeroinitializer
	; CHECK-NEXT: [[TMP10:%.*]] = or <4 x i1> [[TMP7]], [[TMP9]]
	; CHECK-NEXT: [[TMP11:%.*]] = select <4 x i1> [[TMP5]], <4 x i1> [[BROADCAST_SPLAT2]], <4 x i1> zeroinitializer
	; CHECK-NEXT: [[TMP12:%.*]] = or <4 x i1> [[TMP11]], [[TMP10]]
	; CHECK-NEXT: [[PREDPHI:%.*]] = select <4 x i1> [[TMP10]], <4 x i32> zeroinitializer, <4 x i32> splat (i32 1)
	; CHECK-NEXT: br label %[[PRED_STORE_CONTINUE12:.*]]
	; CHECK: [[PRED_STORE_CONTINUE12]]:
	; CHECK-NEXT: [[TMP26:%.]] = phi i32 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.]], %[[PRED_STORE_CONTINUE12]] ]
	; CHECK-NEXT: [[TMP27:%.*]] = getelementptr i32, ptr [[P]], i32 [[TMP26]]
	; CHECK-NEXT: call void @llvm.masked.store.v4i32.p0(<4 x i32> [[PREDPHI]], ptr align 4 [[TMP27]], <4 x i1> [[TMP12]])
	; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[TMP26]], 4
	; CHECK-NEXT: [[TMP29:%.*]] = icmp eq i32 [[INDEX_NEXT]], 128
	; CHECK-NEXT: br i1 [[TMP29]], label %[[MIDDLE_BLOCK:.*]], label %[[PRED_STORE_CONTINUE12]], !llvm.loop [[LOOP3:![0-9]+]]
	; CHECK: [[MIDDLE_BLOCK]]:
	; CHECK-NEXT: br label %[[EXIT:.*]]
	; CHECK: [[EXIT]]:
	; CHECK-NEXT: ret void
	;
	entry:
	br label %bb0

	bb0:
	; bb0
	; / \
	; bb1 bb2
	; / \ \|
	; bb3 bb4 \|
	; / \ / \ /
	; \ bb5 bb6
	; \ \ / /
	; \ bb7 /
	; \ \| /
	; bb8
	; The blend masks for %phi in bb7 should be:
	; bb5 := bb1->bb3 v bb4->bb5 := (c0 && c1) \|\| (c0 && !c1 && c4)
	; bb6 := bb4->bb6 v bb0->bb2 := (c0 && !c1 && !c4) \|\| !c1
	%iv = phi i32 [0, %entry], [%iv.next, %bb8]
	br i1 %c0, label %bb1, label %bb2

	bb1:
	br i1 %c1, label %bb3, label %bb4

	bb2:
	br label %bb6

	bb3:
	br i1 %c3, label %bb8, label %bb5

	bb4:
	br i1 %c4, label %bb5, label %bb6

	bb5:
	br label %bb7

	bb6:
	br i1 %c6, label %bb7, label %bb8

	bb7:
	%phi = phi i32 [0, %bb5], [1, %bb6]
	%gep = getelementptr i32, ptr %p, i32 %iv
	store i32 %phi, ptr %gep
	br label %bb8

	bb8:
	%iv.next = add i32 %iv, 1
	%ec = icmp eq i32 %iv.next, 128
	br i1 %ec, label %exit, label %bb0

	exit:
	ret void
	}

	define void @blend_masks_triangle_phi(ptr noalias %p, i1 %c0, i1 %c1) {
	; CHECK-LABEL: define void @blend_masks_triangle_phi(
	; CHECK-SAME: ptr noalias [[P:%.]], i1 [[C0:%.]], i1 [[C1:%.*]]) {
	; CHECK-NEXT: [[ENTRY:.*:]]
	; CHECK-NEXT: br label %[[VECTOR_PH:.*]]
	; CHECK: [[VECTOR_PH]]:
	; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i1> poison, i1 [[C1]], i64 0
	; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT]], <4 x i1> poison, <4 x i32> zeroinitializer
	; CHECK-NEXT: [[BROADCAST_SPLATINSERT1:%.*]] = insertelement <4 x i1> poison, i1 [[C0]], i64 0
	; CHECK-NEXT: [[BROADCAST_SPLAT2:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT1]], <4 x i1> poison, <4 x i32> zeroinitializer
	; CHECK-NEXT: [[TMP0:%.*]] = select <4 x i1> [[BROADCAST_SPLAT2]], <4 x i1> [[BROADCAST_SPLAT]], <4 x i1> zeroinitializer
	; CHECK-NEXT: [[PREDPHI:%.*]] = select <4 x i1> [[TMP0]], <4 x i32> zeroinitializer, <4 x i32> splat (i32 1)
	; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
	; CHECK: [[VECTOR_BODY]]:
	; CHECK-NEXT: [[INDEX:%.]] = phi i32 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.]], %[[VECTOR_BODY]] ]
	; CHECK-NEXT: [[TMP1:%.*]] = getelementptr i32, ptr [[P]], i32 [[INDEX]]
	; CHECK-NEXT: store <4 x i32> [[PREDPHI]], ptr [[TMP1]], align 4
	; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4
	; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i32 [[INDEX_NEXT]], 128
	; CHECK-NEXT: br i1 [[TMP2]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]
	; CHECK: [[MIDDLE_BLOCK]]:
	; CHECK-NEXT: br label %[[EXIT:.*]]
	; CHECK: [[EXIT]]:
	; CHECK-NEXT: ret void
	;
	entry:
	br label %bb0

	bb0:
	; bb0
	; / \|
	; bb1 \|
	; \| \ \|
	; \| bb2
	; \| /
	; bb3
	; The blend masks for %phi in bb3 should be:
	; bb0 := bb1->bb2 v bb0->bb2 := c0 && !c1 \|\| !c0
	; bb1 := bb1->bb3 := c0 && c1
	%iv = phi i32 [0, %entry], [%iv.next, %bb3]
	br i1 %c0, label %bb1, label %bb2

	bb1:
	br i1 %c1, label %bb3, label %bb2

	bb2:
	br label %bb3

	bb3:
	%phi = phi i32 [0, %bb1], [1, %bb2]
	%gep = getelementptr i32, ptr %p, i32 %iv
	store i32 %phi, ptr %gep
	%iv.next = add i32 %iv, 1
	%ec = icmp eq i32 %iv.next, 128
	br i1 %ec, label %exit, label %bb0

	exit:
	ret void
	}

	define void @simplifiable_blend(i1 %c1, i1 %c2, i1 %c3, i32 %x, i32 %y, ptr %p) {
	; CHECK-LABEL: define void @simplifiable_blend(
	; CHECK-SAME: i1 [[C1:%.]], i1 [[C2:%.]], i1 [[C3:%.]], i32 [[X:%.]], i32 [[Y:%.]], ptr [[P:%.]]) {
	; CHECK-NEXT: [[ENTRY:.*:]]
	; CHECK-NEXT: br label %[[VECTOR_PH:.*]]
	; CHECK: [[VECTOR_PH]]:
	; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i32> poison, i32 [[Y]], i64 0
	; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i32> [[BROADCAST_SPLATINSERT]], <4 x i32> poison, <4 x i32> zeroinitializer
	; CHECK-NEXT: [[BROADCAST_SPLATINSERT1:%.*]] = insertelement <4 x i32> poison, i32 [[X]], i64 0
	; CHECK-NEXT: [[BROADCAST_SPLAT2:%.*]] = shufflevector <4 x i32> [[BROADCAST_SPLATINSERT1]], <4 x i32> poison, <4 x i32> zeroinitializer
	; CHECK-NEXT: [[PREDPHI7:%.*]] = select i1 [[C1]], <4 x i32> [[BROADCAST_SPLAT2]], <4 x i32> [[BROADCAST_SPLAT]]
	; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
	; CHECK: [[VECTOR_BODY]]:
	; CHECK-NEXT: [[INDEX:%.]] = phi i32 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.]], %[[VECTOR_BODY]] ]
	; CHECK-NEXT: [[TMP3:%.*]] = getelementptr i32, ptr [[P]], i32 [[INDEX]]
	; CHECK-NEXT: store <4 x i32> [[PREDPHI7]], ptr [[TMP3]], align 4
	; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4
	; CHECK-NEXT: [[TMP4:%.*]] = icmp eq i32 [[INDEX_NEXT]], 128
	; CHECK-NEXT: br i1 [[TMP4]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]
	; CHECK: [[MIDDLE_BLOCK]]:
	; CHECK-NEXT: br label %[[EXIT:.*]]
	; CHECK: [[EXIT]]:
	; CHECK-NEXT: ret void
	;
	entry:
	br label %loop

	loop:
	%iv = phi i32 [0, %entry], [%iv.next, %latch]
	br i1 %c1, label %A, label %B

	A:
	br i1 %c2, label %C, label %D

	B:
	br i1 %c3, label %F, label %E

	C:
	br label %latch

	D:
	br label %latch

	E:
	br label %F

	F:
	br label %latch

	latch:
	%phi = phi i32 [ %x, %C ], [ %x, %D ], [ %y, %F ]
	%gep = getelementptr i32, ptr %p, i32 %iv
	store i32 %phi, ptr %gep
	%iv.next = add i32 %iv, 1
	%ec = icmp eq i32 %iv.next, 128
	br i1 %ec, label %exit, label %loop

	exit:
	ret void
	}