; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=loop-vectorize,dce,instcombine -force-vector-interleave=1 -force-vector-width=4 -S | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
; A tricky loop:
;
; void loop(int *a, int *b) {
; for (int i = 0; i < 512; ++i) {
; a[a[i]] = b[i];
; a[i] = b[i+1];
; }
;}
define void @loop(ptr nocapture %a, ptr nocapture %b) nounwind uwtable {
; CHECK-LABEL: @loop(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[B:%.*]], i64 [[INDVARS_IV]]
; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i64 [[INDVARS_IV]]
; CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[ARRAYIDX2]], align 4
; CHECK-NEXT: [[IDXPROM3:%.*]] = sext i32 [[TMP1]] to i64
; CHECK-NEXT: [[ARRAYIDX4:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[IDXPROM3]]
; CHECK-NEXT: store i32 [[TMP0]], ptr [[ARRAYIDX4]], align 4
; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1
; CHECK-NEXT: [[ARRAYIDX6:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDVARS_IV_NEXT]]
; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[ARRAYIDX6]], align 4
; CHECK-NEXT: store i32 [[TMP2]], ptr [[ARRAYIDX2]], align 4
; CHECK-NEXT: [[TMP3:%.*]] = and i64 [[INDVARS_IV_NEXT]], 4294967295
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[TMP3]], 512
; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_END:%.*]], label [[FOR_BODY]]
; CHECK: for.end:
; CHECK-NEXT: ret void
;
entry:
br label %for.body
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds i32, ptr %b, i64 %indvars.iv
%0 = load i32, ptr %arrayidx, align 4
%arrayidx2 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
%1 = load i32, ptr %arrayidx2, align 4
%idxprom3 = sext i32 %1 to i64
%arrayidx4 = getelementptr inbounds i32, ptr %a, i64 %idxprom3
store i32 %0, ptr %arrayidx4, align 4
%indvars.iv.next = add i64 %indvars.iv, 1
%arrayidx6 = getelementptr inbounds i32, ptr %b, i64 %indvars.iv.next
%2 = load i32, ptr %arrayidx6, align 4
store i32 %2, ptr %arrayidx2, align 4
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, 512
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body
ret void
}
; The same loop with parallel loop metadata added to the loop branch
; and the memory instructions.
define void @parallel_loop(ptr nocapture %a, ptr nocapture %b) nounwind uwtable {
; CHECK-LABEL: @parallel_loop(
; 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 i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP0:%.*]] = or disjoint i64 [[INDEX]], 1
; CHECK-NEXT: [[TMP1:%.*]] = or disjoint i64 [[INDEX]], 2
; CHECK-NEXT: [[TMP2:%.*]] = or disjoint i64 [[INDEX]], 3
; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds i32, ptr [[B:%.*]], i64 [[INDEX]]
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <4 x i32>, ptr [[TMP3]], align 4, !llvm.access.group [[ACC_GRP0:![0-9]+]]
; CHECK-NEXT: [[TMP5:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i64 [[INDEX]]
; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[TMP0]]
; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[TMP1]]
; CHECK-NEXT: [[TMP8:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[TMP2]]
; CHECK-NEXT: [[TMP9:%.*]] = load i32, ptr [[TMP5]], align 4, !llvm.access.group [[ACC_GRP0]]
; CHECK-NEXT: [[TMP10:%.*]] = load i32, ptr [[TMP6]], align 4, !llvm.access.group [[ACC_GRP0]]
; CHECK-NEXT: [[TMP11:%.*]] = load i32, ptr [[TMP7]], align 4, !llvm.access.group [[ACC_GRP0]]
; CHECK-NEXT: [[TMP12:%.*]] = load i32, ptr [[TMP8]], align 4, !llvm.access.group [[ACC_GRP0]]
; CHECK-NEXT: [[TMP13:%.*]] = sext i32 [[TMP9]] to i64
; CHECK-NEXT: [[TMP14:%.*]] = sext i32 [[TMP10]] to i64
; CHECK-NEXT: [[TMP15:%.*]] = sext i32 [[TMP11]] to i64
; CHECK-NEXT: [[TMP16:%.*]] = sext i32 [[TMP12]] to i64
; CHECK-NEXT: [[TMP17:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[TMP13]]
; CHECK-NEXT: [[TMP18:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[TMP14]]
; CHECK-NEXT: [[TMP19:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[TMP15]]
; CHECK-NEXT: [[TMP20:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[TMP16]]
; CHECK-NEXT: [[TMP21:%.*]] = extractelement <4 x i32> [[WIDE_LOAD]], i64 0
; CHECK-NEXT: store i32 [[TMP21]], ptr [[TMP17]], align 4, !llvm.access.group [[ACC_GRP1:![0-9]+]]
; CHECK-NEXT: [[TMP22:%.*]] = extractelement <4 x i32> [[WIDE_LOAD]], i64 1
; CHECK-NEXT: store i32 [[TMP22]], ptr [[TMP18]], align 4, !llvm.access.group [[ACC_GRP1]]
; CHECK-NEXT: [[TMP23:%.*]] = extractelement <4 x i32> [[WIDE_LOAD]], i64 2
; CHECK-NEXT: store i32 [[TMP23]], ptr [[TMP19]], align 4, !llvm.access.group [[ACC_GRP1]]
; CHECK-NEXT: [[TMP24:%.*]] = extractelement <4 x i32> [[WIDE_LOAD]], i64 3
; CHECK-NEXT: store i32 [[TMP24]], ptr [[TMP20]], align 4, !llvm.access.group [[ACC_GRP1]]
; CHECK-NEXT: [[TMP25:%.*]] = or disjoint i64 [[INDEX]], 1
; CHECK-NEXT: [[TMP26:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[TMP25]]
; CHECK-NEXT: [[WIDE_LOAD1:%.*]] = load <4 x i32>, ptr [[TMP26]], align 4, !llvm.access.group [[ACC_GRP0]]
; CHECK-NEXT: store <4 x i32> [[WIDE_LOAD1]], ptr [[TMP5]], align 4, !llvm.access.group [[ACC_GRP0]]
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT: [[TMP29:%.*]] = icmp eq i64 [[INDEX_NEXT]], 512
; CHECK-NEXT: br i1 [[TMP29]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP2:![0-9]+]]
; CHECK: middle.block:
; CHECK-NEXT: br i1 true, label [[FOR_END:%.*]], label [[SCALAR_PH]]
; CHECK: scalar.ph:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: br i1 poison, label [[FOR_END]], label [[FOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]
; CHECK: for.end:
; CHECK-NEXT: ret void
;
entry:
br label %for.body
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds i32, ptr %b, i64 %indvars.iv
%0 = load i32, ptr %arrayidx, align 4, !llvm.access.group !13
%arrayidx2 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
%1 = load i32, ptr %arrayidx2, align 4, !llvm.access.group !13
%idxprom3 = sext i32 %1 to i64
%arrayidx4 = getelementptr inbounds i32, ptr %a, i64 %idxprom3
; This store might have originated from inlining a function with a parallel
; loop. Refers to a list with the "original loop reference" (!4) also included.
store i32 %0, ptr %arrayidx4, align 4, !llvm.access.group !15
%indvars.iv.next = add i64 %indvars.iv, 1
%arrayidx6 = getelementptr inbounds i32, ptr %b, i64 %indvars.iv.next
%2 = load i32, ptr %arrayidx6, align 4, !llvm.access.group !13
store i32 %2, ptr %arrayidx2, align 4, !llvm.access.group !13
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, 512
br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !3
for.end: ; preds = %for.body
ret void
}
; The same loop with an illegal parallel loop metadata: the memory
; accesses refer to a different loop's identifier.
define void @mixed_metadata(ptr nocapture %a, ptr nocapture %b) nounwind uwtable {
; CHECK-LABEL: @mixed_metadata(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[B:%.*]], i64 [[INDVARS_IV]]
; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[ARRAYIDX]], align 4, !llvm.access.group [[ACC_GRP7:![0-9]+]]
; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i64 [[INDVARS_IV]]
; CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[ARRAYIDX2]], align 4, !llvm.access.group [[ACC_GRP7]]
; CHECK-NEXT: [[IDXPROM3:%.*]] = sext i32 [[TMP1]] to i64
; CHECK-NEXT: [[ARRAYIDX4:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[IDXPROM3]]
; CHECK-NEXT: store i32 [[TMP0]], ptr [[ARRAYIDX4]], align 4, !llvm.access.group [[ACC_GRP8:![0-9]+]]
; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1
; CHECK-NEXT: [[ARRAYIDX6:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDVARS_IV_NEXT]]
; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[ARRAYIDX6]], align 4, !llvm.access.group [[ACC_GRP7]]
; CHECK-NEXT: store i32 [[TMP2]], ptr [[ARRAYIDX2]], align 4, !llvm.access.group [[ACC_GRP7]]
; CHECK-NEXT: [[TMP3:%.*]] = and i64 [[INDVARS_IV_NEXT]], 4294967295
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[TMP3]], 512
; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_END:%.*]], label [[FOR_BODY]], !llvm.loop [[LOOP9:![0-9]+]]
; CHECK: for.end:
; CHECK-NEXT: ret void
;
entry:
br label %for.body
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds i32, ptr %b, i64 %indvars.iv
%0 = load i32, ptr %arrayidx, align 4, !llvm.access.group !16
%arrayidx2 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
%1 = load i32, ptr %arrayidx2, align 4, !llvm.access.group !16
%idxprom3 = sext i32 %1 to i64
%arrayidx4 = getelementptr inbounds i32, ptr %a, i64 %idxprom3
; This refers to the loop marked with !7 which we are not in at the moment.
; It should prevent detecting as a parallel loop.
store i32 %0, ptr %arrayidx4, align 4, !llvm.access.group !17
%indvars.iv.next = add i64 %indvars.iv, 1
%arrayidx6 = getelementptr inbounds i32, ptr %b, i64 %indvars.iv.next
%2 = load i32, ptr %arrayidx6, align 4, !llvm.access.group !16
store i32 %2, ptr %arrayidx2, align 4, !llvm.access.group !16
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, 512
br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !6
for.end: ; preds = %for.body
ret void
}
!3 = !{!3, !{!"llvm.loop.parallel_accesses", !13, !15}}
!4 = !{!4, !{!"llvm.loop.parallel_accesses", !14, !15}}
!6 = !{!6, !{!"llvm.loop.parallel_accesses", !16}}
!7 = !{!7, !{!"llvm.loop.parallel_accesses", !17}}
!13 = distinct !{}
!14 = distinct !{}
!15 = distinct !{}
!16 = distinct !{}
!17 = distinct !{}
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