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clang-p2996/llvm/test/Transforms/LoopVectorize/single-value-blend-phis.ll
Florian Hahn da740492b0 [VPlan] Remove dead header-phi recipes. 
This patch adds a new transform to remove dead recipes. For now, it only
removes dead recipes in the header, to keep the number tests that require
updating manageable. Future patches will extend this to remove dead
recipes across the whole plan.

Reviewed By: Ayal

Differential Revision: https://reviews.llvm.org/D118051
2022-02-26 16:26:39 +00:00

366 lines
19 KiB
LLVM
Raw Blame History

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -loop-vectorize -force-vector-width=2 -S %s | FileCheck %s
@src = external global [32 x i16], align 1
@dst = external global [32 x i16], align 1
; The load in the loop does not need predication, because the accessed memory
; is de-referenceable for all loop iterations.
define void @single_incoming_phi_no_blend_mask(i64 %a, i64 %b) {
; CHECK-LABEL: @single_incoming_phi_no_blend_mask(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <2 x i64> poison, i64 [[A:%.*]], i32 0
; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <2 x i64> [[BROADCAST_SPLATINSERT]], <2 x i64> poison, <2 x i32> zeroinitializer
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <2 x i64> [ <i64 0, i64 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0
; CHECK-NEXT: [[TMP1:%.*]] = add i64 [[INDEX]], 1
; CHECK-NEXT: [[TMP2:%.*]] = trunc i64 [[INDEX]] to i16
; CHECK-NEXT: [[TMP3:%.*]] = add i16 [[TMP2]], 0
; CHECK-NEXT: [[TMP4:%.*]] = getelementptr inbounds [32 x i16], [32 x i16]* @src, i16 0, i16 [[TMP3]]
; CHECK-NEXT: [[TMP5:%.*]] = getelementptr inbounds i16, i16* [[TMP4]], i32 0
; CHECK-NEXT: [[TMP6:%.*]] = bitcast i16* [[TMP5]] to <2 x i16>*
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <2 x i16>, <2 x i16>* [[TMP6]], align 1
; CHECK-NEXT: [[TMP7:%.*]] = icmp sgt <2 x i64> [[VEC_IND]], [[BROADCAST_SPLAT]]
; CHECK-NEXT: [[TMP8:%.*]] = xor <2 x i1> [[TMP7]], <i1 true, i1 true>
; CHECK-NEXT: [[PREDPHI:%.*]] = select <2 x i1> [[TMP7]], <2 x i16> <i16 1, i16 1>, <2 x i16> [[WIDE_LOAD]]
; CHECK-NEXT: [[TMP9:%.*]] = getelementptr inbounds [32 x i16], [32 x i16]* @dst, i16 0, i64 [[TMP0]]
; CHECK-NEXT: [[TMP10:%.*]] = getelementptr inbounds i16, i16* [[TMP9]], i32 0
; CHECK-NEXT: [[TMP11:%.*]] = bitcast i16* [[TMP10]] to <2 x i16>*
; CHECK-NEXT: store <2 x i16> [[PREDPHI]], <2 x i16>* [[TMP11]], align 2
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i64> [[VEC_IND]], <i64 2, i64 2>
; CHECK-NEXT: [[TMP12:%.*]] = icmp eq i64 [[INDEX_NEXT]], 32
; CHECK-NEXT: br i1 [[TMP12]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], [[LOOP0:!llvm.loop !.*]]
; CHECK: middle.block:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 32, 32
; CHECK-NEXT: br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
; CHECK: scalar.ph:
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ 32, [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: br label [[LOOP_HEADER:%.*]]
; CHECK: loop.header:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
; CHECK-NEXT: [[IV_TRUNC:%.*]] = trunc i64 [[IV]] to i16
; CHECK-NEXT: br label [[LOOP_COND:%.*]]
; CHECK: loop.cond:
; CHECK-NEXT: [[BLEND:%.*]] = phi i16 [ [[IV_TRUNC]], [[LOOP_HEADER]] ]
; CHECK-NEXT: [[SRC_PTR:%.*]] = getelementptr inbounds [32 x i16], [32 x i16]* @src, i16 0, i16 [[BLEND]]
; CHECK-NEXT: [[LV:%.*]] = load i16, i16* [[SRC_PTR]], align 1
; CHECK-NEXT: [[CMP_B:%.*]] = icmp sgt i64 [[IV]], [[A]]
; CHECK-NEXT: br i1 [[CMP_B]], label [[LOOP_NEXT:%.*]], label [[LOOP_LATCH]]
; CHECK: loop.next:
; CHECK-NEXT: br label [[LOOP_LATCH]]
; CHECK: loop.latch:
; CHECK-NEXT: [[RES:%.*]] = phi i16 [ [[LV]], [[LOOP_COND]] ], [ 1, [[LOOP_NEXT]] ]
; CHECK-NEXT: [[DST_PTR:%.*]] = getelementptr inbounds [32 x i16], [32 x i16]* @dst, i16 0, i64 [[IV]]
; CHECK-NEXT: store i16 [[RES]], i16* [[DST_PTR]], align 2
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[CMP439:%.*]] = icmp ult i64 [[IV]], 31
; CHECK-NEXT: br i1 [[CMP439]], label [[LOOP_HEADER]], label [[EXIT]], [[LOOP2:!llvm.loop !.*]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop.header
loop.header:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ]
%iv.trunc = trunc i64 %iv to i16
br label %loop.cond
loop.cond:
%blend = phi i16 [ %iv.trunc, %loop.header ]
%src.ptr = getelementptr inbounds [32 x i16], [32 x i16]* @src, i16 0, i16 %blend
%lv = load i16, i16* %src.ptr, align 1
%cmp.b = icmp sgt i64 %iv, %a
br i1 %cmp.b, label %loop.next, label %loop.latch
loop.next:
br label %loop.latch
loop.latch:
%res = phi i16 [ %lv, %loop.cond ], [ 1, %loop.next ]
%dst.ptr = getelementptr inbounds [32 x i16], [32 x i16]* @dst, i16 0, i64 %iv
store i16 %res, i16* %dst.ptr
%iv.next = add nuw nsw i64 %iv, 1
%cmp439 = icmp ult i64 %iv, 31
br i1 %cmp439, label %loop.header, label %exit
exit:
ret void
}
; The load in the loop does not need predication, because the accessed memory
; is de-referenceable for all loop iterations.
define void @single_incoming_phi_with_blend_mask(i64 %a, i64 %b) {
; CHECK-LABEL: @single_incoming_phi_with_blend_mask(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <2 x i64> poison, i64 [[A:%.*]], i32 0
; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <2 x i64> [[BROADCAST_SPLATINSERT]], <2 x i64> poison, <2 x i32> zeroinitializer
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <2 x i64> [ <i64 0, i64 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0
; CHECK-NEXT: [[TMP1:%.*]] = add i64 [[INDEX]], 1
; CHECK-NEXT: [[TMP2:%.*]] = trunc i64 [[INDEX]] to i16
; CHECK-NEXT: [[TMP3:%.*]] = add i16 [[TMP2]], 0
; CHECK-NEXT: [[TMP4:%.*]] = icmp ugt <2 x i64> [[VEC_IND]], [[BROADCAST_SPLAT]]
; CHECK-NEXT: [[TMP5:%.*]] = getelementptr [32 x i16], [32 x i16]* @src, i16 0, i16 [[TMP3]]
; CHECK-NEXT: [[TMP6:%.*]] = getelementptr i16, i16* [[TMP5]], i32 0
; CHECK-NEXT: [[TMP7:%.*]] = bitcast i16* [[TMP6]] to <2 x i16>*
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <2 x i16>, <2 x i16>* [[TMP7]], align 1
; CHECK-NEXT: [[TMP8:%.*]] = icmp sgt <2 x i64> [[VEC_IND]], [[BROADCAST_SPLAT]]
; CHECK-NEXT: [[TMP9:%.*]] = xor <2 x i1> [[TMP4]], <i1 true, i1 true>
; CHECK-NEXT: [[TMP10:%.*]] = xor <2 x i1> [[TMP8]], <i1 true, i1 true>
; CHECK-NEXT: [[TMP11:%.*]] = select <2 x i1> [[TMP4]], <2 x i1> [[TMP10]], <2 x i1> zeroinitializer
; CHECK-NEXT: [[TMP12:%.*]] = select <2 x i1> [[TMP4]], <2 x i1> [[TMP8]], <2 x i1> zeroinitializer
; CHECK-NEXT: [[PREDPHI:%.*]] = select <2 x i1> [[TMP11]], <2 x i16> [[WIDE_LOAD]], <2 x i16> zeroinitializer
; CHECK-NEXT: [[PREDPHI1:%.*]] = select <2 x i1> [[TMP12]], <2 x i16> <i16 1, i16 1>, <2 x i16> [[PREDPHI]]
; CHECK-NEXT: [[TMP13:%.*]] = getelementptr inbounds [32 x i16], [32 x i16]* @dst, i16 0, i64 [[TMP0]]
; CHECK-NEXT: [[TMP14:%.*]] = getelementptr inbounds i16, i16* [[TMP13]], i32 0
; CHECK-NEXT: [[TMP15:%.*]] = bitcast i16* [[TMP14]] to <2 x i16>*
; CHECK-NEXT: store <2 x i16> [[PREDPHI1]], <2 x i16>* [[TMP15]], align 2
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i64> [[VEC_IND]], <i64 2, i64 2>
; CHECK-NEXT: [[TMP16:%.*]] = icmp eq i64 [[INDEX_NEXT]], 32
; CHECK-NEXT: br i1 [[TMP16]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], [[LOOP4:!llvm.loop !.*]]
; CHECK: middle.block:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 32, 32
; CHECK-NEXT: br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
;
entry:
br label %loop.header
loop.header:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ]
%iv.trunc = trunc i64 %iv to i16
%cmp.a = icmp ugt i64 %iv, %a
br i1 %cmp.a, label %loop.cond, label %loop.latch
loop.cond:
%blend = phi i16 [ %iv.trunc, %loop.header ]
%src.ptr = getelementptr inbounds [32 x i16], [32 x i16]* @src, i16 0, i16 %blend
%lv = load i16, i16* %src.ptr, align 1
%cmp.b = icmp sgt i64 %iv, %a
br i1 %cmp.b, label %loop.next, label %loop.latch
loop.next:
br label %loop.latch
loop.latch:
%res = phi i16 [ 0, %loop.header ], [ %lv, %loop.cond ], [ 1, %loop.next ]
%dst.ptr = getelementptr inbounds [32 x i16], [32 x i16]* @dst, i16 0, i64 %iv
store i16 %res, i16* %dst.ptr
%iv.next = add nuw nsw i64 %iv, 1
%cmp439 = icmp ult i64 %iv, 31
br i1 %cmp439, label %loop.header, label %exit
exit:
ret void
}
define void @multiple_incoming_phi_with_blend_mask(i64 %a, i16* noalias %dst) {
; CHECK-LABEL: @multiple_incoming_phi_with_blend_mask(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <2 x i64> poison, i64 [[A:%.*]], i32 0
; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <2 x i64> [[BROADCAST_SPLATINSERT]], <2 x i64> poison, <2 x i32> zeroinitializer
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <2 x i64> [ <i64 0, i64 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND1:%.*]] = phi <2 x i16> [ <i16 0, i16 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT2:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND3:%.*]] = phi <2 x i16> [ <i16 0, i16 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT4:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0
; CHECK-NEXT: [[TMP1:%.*]] = add i64 [[INDEX]], 1
; CHECK-NEXT: [[TMP2:%.*]] = icmp ugt <2 x i64> [[VEC_IND]], [[BROADCAST_SPLAT]]
; CHECK-NEXT: [[TMP3:%.*]] = xor <2 x i1> [[TMP2]], <i1 true, i1 true>
; CHECK-NEXT: [[PREDPHI:%.*]] = select <2 x i1> [[TMP2]], <2 x i16> [[VEC_IND3]], <2 x i16> [[VEC_IND1]]
; CHECK-NEXT: [[TMP4:%.*]] = extractelement <2 x i16> [[PREDPHI]], i32 0
; CHECK-NEXT: [[TMP5:%.*]] = getelementptr inbounds [32 x i16], [32 x i16]* @src, i16 0, i16 [[TMP4]]
; CHECK-NEXT: [[TMP6:%.*]] = extractelement <2 x i16> [[PREDPHI]], i32 1
; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds [32 x i16], [32 x i16]* @src, i16 0, i16 [[TMP6]]
; CHECK-NEXT: [[TMP8:%.*]] = load i16, i16* [[TMP5]], align 1
; CHECK-NEXT: [[TMP9:%.*]] = load i16, i16* [[TMP7]], align 1
; CHECK-NEXT: [[INS1:%.+]] = insertelement <2 x i16> poison, i16 [[TMP8]], i32 0
; CHECK-NEXT: [[INS2:%.+]] = insertelement <2 x i16> [[INS1]], i16 [[TMP9]], i32 1
; CHECK-NEXT: [[DST0:%.+]] = getelementptr inbounds i16, i16* %dst, i64 [[TMP0]]
; CHECK-NEXT: [[DST1:%.+]] = getelementptr inbounds i16, i16* [[DST0]], i32 0
; CHECK-NEXT: [[DST1_BC:%.+]] = bitcast i16* [[DST1]] to <2 x i16>*
; CHECK-NEXT: store <2 x i16> [[INS2]], <2 x i16>* [[DST1_BC]], align 2
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i64> [[VEC_IND]], <i64 2, i64 2>
; CHECK-NEXT: [[VEC_IND_NEXT2]] = add <2 x i16> [[VEC_IND1]], <i16 2, i16 2>
; CHECK-NEXT: [[VEC_IND_NEXT4]] = add <2 x i16> [[VEC_IND3]], <i16 2, i16 2>
; CHECK-NEXT: [[TMP10:%.*]] = icmp eq i64 [[INDEX_NEXT]], 32
; CHECK-NEXT: br i1 [[TMP10]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], [[LOOP6:!llvm.loop !.*]]
; CHECK: middle.block:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 32, 32
; CHECK-NEXT: br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
;
entry:
br label %loop.header
loop.header:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ]
%iv.trunc = trunc i64 %iv to i16
%iv.trunc.2 = trunc i64 %iv to i16
%cmp.a = icmp ugt i64 %iv, %a
br i1 %cmp.a, label %loop.next, label %loop.latch
loop.next:
br label %loop.latch
loop.latch:
%blend = phi i16 [ %iv.trunc, %loop.header ], [ %iv.trunc.2, %loop.next ]
%src.ptr = getelementptr inbounds [32 x i16], [32 x i16]* @src, i16 0, i16 %blend
%lv = load i16, i16* %src.ptr, align 1
%dst.ptr = getelementptr inbounds i16, i16* %dst, i64 %iv
store i16 %lv, i16* %dst.ptr
%iv.next = add nuw nsw i64 %iv, 1
%cmp439 = icmp ult i64 %iv, 31
br i1 %cmp439, label %loop.header, label %exit
exit:
ret void
}
; The load in the loop needs predication, because the accessed memory is not
; de-referencable for all iterations of the loop.
define void @single_incoming_needs_predication(i64 %a, i64 %b) {
; CHECK-LABEL: @single_incoming_needs_predication(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <2 x i64> poison, i64 [[A:%.*]], i32 0
; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <2 x i64> [[BROADCAST_SPLATINSERT]], <2 x i64> poison, <2 x i32> zeroinitializer
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[PRED_LOAD_CONTINUE4:%.*]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <2 x i64> [ <i64 0, i64 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[PRED_LOAD_CONTINUE4]] ]
; CHECK-NEXT: [[VEC_IND1:%.*]] = phi <2 x i16> [ <i16 0, i16 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT2:%.*]], [[PRED_LOAD_CONTINUE4]] ]
; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0
; CHECK-NEXT: [[TMP1:%.*]] = add i64 [[INDEX]], 1
; CHECK-NEXT: [[TMP2:%.*]] = icmp ugt <2 x i64> [[VEC_IND]], [[BROADCAST_SPLAT]]
; CHECK-NEXT: [[TMP3:%.*]] = extractelement <2 x i1> [[TMP2]], i32 0
; CHECK-NEXT: br i1 [[TMP3]], label [[PRED_LOAD_IF:%.*]], label [[PRED_LOAD_CONTINUE:%.*]]
; CHECK: pred.load.if:
; CHECK-NEXT: [[TMP4:%.*]] = extractelement <2 x i16> [[VEC_IND1]], i32 0
; CHECK-NEXT: [[TMP5:%.*]] = getelementptr inbounds [32 x i16], [32 x i16]* @src, i16 0, i16 [[TMP4]]
; CHECK-NEXT: [[TMP6:%.*]] = load i16, i16* [[TMP5]], align 1
; CHECK-NEXT: [[TMP7:%.*]] = insertelement <2 x i16> poison, i16 [[TMP6]], i32 0
; CHECK-NEXT: br label [[PRED_LOAD_CONTINUE]]
; CHECK: pred.load.continue:
; CHECK-NEXT: [[TMP8:%.*]] = phi <2 x i16> [ poison, [[VECTOR_BODY]] ], [ [[TMP7]], [[PRED_LOAD_IF]] ]
; CHECK-NEXT: [[TMP9:%.*]] = extractelement <2 x i1> [[TMP2]], i32 1
; CHECK-NEXT: br i1 [[TMP9]], label [[PRED_LOAD_IF3:%.*]], label [[PRED_LOAD_CONTINUE4]]
; CHECK: pred.load.if3:
; CHECK-NEXT: [[TMP10:%.*]] = extractelement <2 x i16> [[VEC_IND1]], i32 1
; CHECK-NEXT: [[TMP11:%.*]] = getelementptr inbounds [32 x i16], [32 x i16]* @src, i16 0, i16 [[TMP10]]
; CHECK-NEXT: [[TMP12:%.*]] = load i16, i16* [[TMP11]], align 1
; CHECK-NEXT: [[TMP13:%.*]] = insertelement <2 x i16> [[TMP8]], i16 [[TMP12]], i32 1
; CHECK-NEXT: br label [[PRED_LOAD_CONTINUE4]]
; CHECK: pred.load.continue4:
; CHECK-NEXT: [[TMP14:%.*]] = phi <2 x i16> [ [[TMP8]], [[PRED_LOAD_CONTINUE]] ], [ [[TMP13]], [[PRED_LOAD_IF3]] ]
; CHECK-NEXT: [[TMP15:%.*]] = icmp sgt <2 x i64> [[VEC_IND]], [[BROADCAST_SPLAT]]
; CHECK-NEXT: [[TMP16:%.*]] = xor <2 x i1> [[TMP2]], <i1 true, i1 true>
; CHECK-NEXT: [[TMP17:%.*]] = xor <2 x i1> [[TMP15]], <i1 true, i1 true>
; CHECK-NEXT: [[TMP18:%.*]] = select <2 x i1> [[TMP2]], <2 x i1> [[TMP17]], <2 x i1> zeroinitializer
; CHECK-NEXT: [[TMP19:%.*]] = select <2 x i1> [[TMP2]], <2 x i1> [[TMP15]], <2 x i1> zeroinitializer
; CHECK-NEXT: [[PREDPHI:%.*]] = select <2 x i1> [[TMP18]], <2 x i16> [[TMP14]], <2 x i16> zeroinitializer
; CHECK-NEXT: [[PREDPHI5:%.*]] = select <2 x i1> [[TMP19]], <2 x i16> <i16 1, i16 1>, <2 x i16> [[PREDPHI]]
; CHECK-NEXT: [[TMP20:%.*]] = getelementptr inbounds [32 x i16], [32 x i16]* @dst, i16 0, i64 [[TMP0]]
; CHECK-NEXT: [[TMP21:%.*]] = getelementptr inbounds i16, i16* [[TMP20]], i32 0
; CHECK-NEXT: [[TMP22:%.*]] = bitcast i16* [[TMP21]] to <2 x i16>*
; CHECK-NEXT: store <2 x i16> [[PREDPHI5]], <2 x i16>* [[TMP22]], align 2
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i64> [[VEC_IND]], <i64 2, i64 2>
; CHECK-NEXT: [[VEC_IND_NEXT2]] = add <2 x i16> [[VEC_IND1]], <i16 2, i16 2>
; CHECK-NEXT: [[TMP23:%.*]] = icmp eq i64 [[INDEX_NEXT]], 64
; CHECK-NEXT: br i1 [[TMP23]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], [[LOOP8:!llvm.loop !.*]]
; CHECK: middle.block:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 64, 64
; CHECK-NEXT: br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
;
entry:
br label %loop.header
loop.header:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ]
%iv.trunc = trunc i64 %iv to i16
%cmp.a = icmp ugt i64 %iv, %a
br i1 %cmp.a, label %loop.cond, label %loop.latch
loop.cond:
%blend = phi i16 [ %iv.trunc, %loop.header ]
%src.ptr = getelementptr inbounds [32 x i16], [32 x i16]* @src, i16 0, i16 %blend
%lv = load i16, i16* %src.ptr, align 1
%cmp.b = icmp sgt i64 %iv, %a
br i1 %cmp.b, label %loop.next, label %loop.latch
loop.next:
br label %loop.latch
loop.latch:
%res = phi i16 [ 0, %loop.header ], [ %lv, %loop.cond ], [ 1, %loop.next ]
%dst.ptr = getelementptr inbounds [32 x i16], [32 x i16]* @dst, i16 0, i64 %iv
store i16 %res, i16* %dst.ptr
%iv.next = add nuw nsw i64 %iv, 1
%cmp439 = icmp ult i64 %iv, 63
br i1 %cmp439, label %loop.header, label %exit
exit:
ret void
}
; Test case for PR44800.
define void @duplicated_incoming_blocks_blend(i32 %x, i32* %ptr) {
; CHECK-LABEL: @duplicated_incoming_blocks_blend(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <2 x i32> [ <i32 0, i32 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP1:%.*]] = extractelement <2 x i32> [[VEC_IND]], i32 0
; CHECK-NEXT: [[TMP2:%.*]] = getelementptr i32, i32* [[PTR:%.*]], i32 [[TMP1]]
; CHECK-NEXT: [[TMP3:%.*]] = getelementptr i32, i32* [[TMP2]], i32 0
; CHECK-NEXT: [[TMP4:%.*]] = bitcast i32* [[TMP3]] to <2 x i32>*
; CHECK-NEXT: store <2 x i32> [[VEC_IND]], <2 x i32>* [[TMP4]], align 4
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i32> [[VEC_IND]], <i32 2, i32 2>
; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i32 [[INDEX_NEXT]], 1000
; CHECK-NEXT: br i1 [[TMP5]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], [[LOOP10:!llvm.loop !.*]]
; CHECK: middle.block:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i32 1000, 1000
; CHECK-NEXT: br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
;
entry:
br label %loop.header
loop.header:
%iv = phi i32 [ 0 , %entry ], [ %add.i, %loop.latch ]
%c.0 = icmp ugt i32 %iv, %x
br i1 %c.0, label %loop.latch, label %loop.latch
loop.latch:
%p = phi i32 [ %iv, %loop.header ], [ %iv, %loop.header ]
%gep.ptr = getelementptr i32, i32* %ptr, i32 %p
store i32 %p, i32* %gep.ptr
%add.i = add nsw i32 %p, 1
%cmp = icmp slt i32 %add.i, 1000
br i1 %cmp, label %loop.header, label %exit
exit:
ret void
}
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