210 lines
11 KiB
LLVM
210 lines
11 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -dce -instcombine -S | FileCheck %s
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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"
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target triple = "x86_64-unknown-linux-gnu"
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; A tricky loop:
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;
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; void loop(int *a, int *b) {
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; for (int i = 0; i < 512; ++i) {
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; a[a[i]] = b[i];
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; a[i] = b[i+1];
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; }
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;}
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define void @loop(i32* nocapture %a, i32* nocapture %b) nounwind uwtable {
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; CHECK-LABEL: @loop(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[B:%.*]], i64 [[INDVARS_IV]]
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; CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* [[ARRAYIDX]], align 4
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; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i64 [[INDVARS_IV]]
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; CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* [[ARRAYIDX2]], align 4
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; CHECK-NEXT: [[IDXPROM3:%.*]] = sext i32 [[TMP1]] to i64
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; CHECK-NEXT: [[ARRAYIDX4:%.*]] = getelementptr inbounds i32, i32* [[A]], i64 [[IDXPROM3]]
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; CHECK-NEXT: store i32 [[TMP0]], i32* [[ARRAYIDX4]], align 4
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; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1
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; CHECK-NEXT: [[ARRAYIDX6:%.*]] = getelementptr inbounds i32, i32* [[B]], i64 [[INDVARS_IV_NEXT]]
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; CHECK-NEXT: [[TMP2:%.*]] = load i32, i32* [[ARRAYIDX6]], align 4
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; CHECK-NEXT: store i32 [[TMP2]], i32* [[ARRAYIDX2]], align 4
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; CHECK-NEXT: [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i32 [[LFTR_WIDEIV]], 512
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; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_END:%.*]], label [[FOR_BODY]]
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; CHECK: for.end:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%arrayidx2 = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%1 = load i32, i32* %arrayidx2, align 4
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%idxprom3 = sext i32 %1 to i64
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%arrayidx4 = getelementptr inbounds i32, i32* %a, i64 %idxprom3
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store i32 %0, i32* %arrayidx4, align 4
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%indvars.iv.next = add i64 %indvars.iv, 1
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%arrayidx6 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv.next
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%2 = load i32, i32* %arrayidx6, align 4
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store i32 %2, i32* %arrayidx2, align 4
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, 512
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret void
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}
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; The same loop with parallel loop metadata added to the loop branch
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; and the memory instructions.
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define void @parallel_loop(i32* nocapture %a, i32* nocapture %b) nounwind uwtable {
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; CHECK-LABEL: @parallel_loop(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
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; CHECK: vector.ph:
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; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
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; CHECK: vector.body:
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; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
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; CHECK-NEXT: [[TMP0:%.*]] = or i64 [[INDEX]], 1
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; CHECK-NEXT: [[TMP1:%.*]] = or i64 [[INDEX]], 2
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; CHECK-NEXT: [[TMP2:%.*]] = or i64 [[INDEX]], 3
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; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds i32, i32* [[B:%.*]], i64 [[INDEX]]
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; CHECK-NEXT: [[TMP4:%.*]] = bitcast i32* [[TMP3]] to <4 x i32>*
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; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <4 x i32>, <4 x i32>* [[TMP4]], align 4, !llvm.access.group !0
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; CHECK-NEXT: [[TMP5:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i64 [[INDEX]]
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; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i32, i32* [[A]], i64 [[TMP0]]
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; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds i32, i32* [[A]], i64 [[TMP1]]
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; CHECK-NEXT: [[TMP8:%.*]] = getelementptr inbounds i32, i32* [[A]], i64 [[TMP2]]
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; CHECK-NEXT: [[TMP9:%.*]] = load i32, i32* [[TMP5]], align 4, !llvm.access.group !0
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; CHECK-NEXT: [[TMP10:%.*]] = load i32, i32* [[TMP6]], align 4, !llvm.access.group !0
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; CHECK-NEXT: [[TMP11:%.*]] = load i32, i32* [[TMP7]], align 4, !llvm.access.group !0
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; CHECK-NEXT: [[TMP12:%.*]] = load i32, i32* [[TMP8]], align 4, !llvm.access.group !0
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; CHECK-NEXT: [[TMP13:%.*]] = sext i32 [[TMP9]] to i64
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; CHECK-NEXT: [[TMP14:%.*]] = sext i32 [[TMP10]] to i64
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; CHECK-NEXT: [[TMP15:%.*]] = sext i32 [[TMP11]] to i64
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; CHECK-NEXT: [[TMP16:%.*]] = sext i32 [[TMP12]] to i64
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; CHECK-NEXT: [[TMP17:%.*]] = getelementptr inbounds i32, i32* [[A]], i64 [[TMP13]]
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; CHECK-NEXT: [[TMP18:%.*]] = getelementptr inbounds i32, i32* [[A]], i64 [[TMP14]]
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; CHECK-NEXT: [[TMP19:%.*]] = getelementptr inbounds i32, i32* [[A]], i64 [[TMP15]]
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; CHECK-NEXT: [[TMP20:%.*]] = getelementptr inbounds i32, i32* [[A]], i64 [[TMP16]]
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; CHECK-NEXT: [[TMP21:%.*]] = extractelement <4 x i32> [[WIDE_LOAD]], i64 0
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; CHECK-NEXT: store i32 [[TMP21]], i32* [[TMP17]], align 4, !llvm.access.group !1
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; CHECK-NEXT: [[TMP22:%.*]] = extractelement <4 x i32> [[WIDE_LOAD]], i64 1
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; CHECK-NEXT: store i32 [[TMP22]], i32* [[TMP18]], align 4, !llvm.access.group !1
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; CHECK-NEXT: [[TMP23:%.*]] = extractelement <4 x i32> [[WIDE_LOAD]], i64 2
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; CHECK-NEXT: store i32 [[TMP23]], i32* [[TMP19]], align 4, !llvm.access.group !1
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; CHECK-NEXT: [[TMP24:%.*]] = extractelement <4 x i32> [[WIDE_LOAD]], i64 3
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; CHECK-NEXT: store i32 [[TMP24]], i32* [[TMP20]], align 4, !llvm.access.group !1
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; CHECK-NEXT: [[TMP25:%.*]] = or i64 [[INDEX]], 1
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; CHECK-NEXT: [[TMP26:%.*]] = getelementptr inbounds i32, i32* [[B]], i64 [[TMP25]]
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; CHECK-NEXT: [[TMP27:%.*]] = bitcast i32* [[TMP26]] to <4 x i32>*
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; CHECK-NEXT: [[WIDE_LOAD1:%.*]] = load <4 x i32>, <4 x i32>* [[TMP27]], align 4, !llvm.access.group !0
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; CHECK-NEXT: [[TMP28:%.*]] = bitcast i32* [[TMP5]] to <4 x i32>*
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; CHECK-NEXT: store <4 x i32> [[WIDE_LOAD1]], <4 x i32>* [[TMP28]], align 4, !llvm.access.group !0
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; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
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; CHECK-NEXT: [[TMP29:%.*]] = icmp eq i64 [[INDEX_NEXT]], 512
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; CHECK-NEXT: br i1 [[TMP29]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP2:![0-9]+]]
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; CHECK: middle.block:
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; CHECK-NEXT: br i1 true, label [[FOR_END:%.*]], label [[SCALAR_PH]]
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; CHECK: scalar.ph:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: br i1 undef, label [[FOR_END]], label [[FOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]
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; CHECK: for.end:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4, !llvm.access.group !13
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%arrayidx2 = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%1 = load i32, i32* %arrayidx2, align 4, !llvm.access.group !13
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%idxprom3 = sext i32 %1 to i64
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%arrayidx4 = getelementptr inbounds i32, i32* %a, i64 %idxprom3
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; This store might have originated from inlining a function with a parallel
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; loop. Refers to a list with the "original loop reference" (!4) also included.
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store i32 %0, i32* %arrayidx4, align 4, !llvm.access.group !15
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%indvars.iv.next = add i64 %indvars.iv, 1
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%arrayidx6 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv.next
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%2 = load i32, i32* %arrayidx6, align 4, !llvm.access.group !13
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store i32 %2, i32* %arrayidx2, align 4, !llvm.access.group !13
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, 512
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br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !3
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for.end: ; preds = %for.body
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ret void
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}
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; The same loop with an illegal parallel loop metadata: the memory
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; accesses refer to a different loop's identifier.
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define void @mixed_metadata(i32* nocapture %a, i32* nocapture %b) nounwind uwtable {
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; CHECK-LABEL: @mixed_metadata(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[B:%.*]], i64 [[INDVARS_IV]]
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; CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* [[ARRAYIDX]], align 4, !llvm.access.group !7
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; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i64 [[INDVARS_IV]]
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; CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* [[ARRAYIDX2]], align 4, !llvm.access.group !7
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; CHECK-NEXT: [[IDXPROM3:%.*]] = sext i32 [[TMP1]] to i64
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; CHECK-NEXT: [[ARRAYIDX4:%.*]] = getelementptr inbounds i32, i32* [[A]], i64 [[IDXPROM3]]
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; CHECK-NEXT: store i32 [[TMP0]], i32* [[ARRAYIDX4]], align 4, !llvm.access.group !8
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; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1
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; CHECK-NEXT: [[ARRAYIDX6:%.*]] = getelementptr inbounds i32, i32* [[B]], i64 [[INDVARS_IV_NEXT]]
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; CHECK-NEXT: [[TMP2:%.*]] = load i32, i32* [[ARRAYIDX6]], align 4, !llvm.access.group !7
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; CHECK-NEXT: store i32 [[TMP2]], i32* [[ARRAYIDX2]], align 4, !llvm.access.group !7
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; CHECK-NEXT: [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i32 [[LFTR_WIDEIV]], 512
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; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_END:%.*]], label [[FOR_BODY]], !llvm.loop [[LOOP9:![0-9]+]]
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; CHECK: for.end:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4, !llvm.access.group !16
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%arrayidx2 = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%1 = load i32, i32* %arrayidx2, align 4, !llvm.access.group !16
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%idxprom3 = sext i32 %1 to i64
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%arrayidx4 = getelementptr inbounds i32, i32* %a, i64 %idxprom3
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; This refers to the loop marked with !7 which we are not in at the moment.
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; It should prevent detecting as a parallel loop.
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store i32 %0, i32* %arrayidx4, align 4, !llvm.access.group !17
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%indvars.iv.next = add i64 %indvars.iv, 1
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%arrayidx6 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv.next
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%2 = load i32, i32* %arrayidx6, align 4, !llvm.access.group !16
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store i32 %2, i32* %arrayidx2, align 4, !llvm.access.group !16
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, 512
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br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !6
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for.end: ; preds = %for.body
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ret void
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}
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!3 = !{!3, !{!"llvm.loop.parallel_accesses", !13, !15}}
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!4 = !{!4, !{!"llvm.loop.parallel_accesses", !14, !15}}
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!6 = !{!6, !{!"llvm.loop.parallel_accesses", !16}}
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!7 = !{!7, !{!"llvm.loop.parallel_accesses", !17}}
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!13 = distinct !{}
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!14 = distinct !{}
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!15 = distinct !{}
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!16 = distinct !{}
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!17 = distinct !{}
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