forked from OSchip/llvm-project
218 lines
7.8 KiB
LLVM
218 lines
7.8 KiB
LLVM
; Test optimization remarks generated by the LoopInterchange pass.
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;
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; RUN: opt < %s -basicaa -loop-interchange -verify-dom-info -verify-loop-info \
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; RUN: -pass-remarks-output=%t -pass-remarks-missed='loop-interchange' \
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; RUN: -pass-remarks='loop-interchange' -S
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; RUN: cat %t | FileCheck %s
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@A = common global [100 x [100 x i32]] zeroinitializer
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@B = common global [100 x [100 x i32]] zeroinitializer
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@C = common global [100 x i32] zeroinitializer
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;;---------------------------------------Test case 01---------------------------------
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;; Loops interchange is not profitable.
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;; for(int i=1;i<N;i++)
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;; for(int j=1;j<N;j++)
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;; A[i-1][j-1] = A[i - 1][j-1] + B[i][j];
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define void @test01(i32 %N){
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entry:
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%cmp31 = icmp sgt i32 %N, 1
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br i1 %cmp31, label %for.cond1.preheader.lr.ph, label %for.end19
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for.cond1.preheader.lr.ph:
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%0 = add i32 %N, -1
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br label %for.body3.lr.ph
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for.body3.lr.ph:
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%indvars.iv34 = phi i64 [ 1, %for.cond1.preheader.lr.ph ], [ %indvars.iv.next35, %for.inc17 ]
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%1 = add nsw i64 %indvars.iv34, -1
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br label %for.body3
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for.body3:
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%indvars.iv = phi i64 [ 1, %for.body3.lr.ph ], [ %indvars.iv.next, %for.body3 ]
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%2 = add nsw i64 %indvars.iv, -1
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%arrayidx6 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %1, i64 %2
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%3 = load i32, i32* %arrayidx6
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%arrayidx10 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @B, i64 0, i64 %indvars.iv34, i64 %indvars.iv
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%4 = load i32, i32* %arrayidx10
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%add = add nsw i32 %4, %3
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store i32 %add, i32* %arrayidx6
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %0
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br i1 %exitcond, label %for.inc17, label %for.body3
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for.inc17:
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%indvars.iv.next35 = add nuw nsw i64 %indvars.iv34, 1
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%lftr.wideiv37 = trunc i64 %indvars.iv34 to i32
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%exitcond38 = icmp eq i32 %lftr.wideiv37, %0
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br i1 %exitcond38, label %for.end19, label %for.body3.lr.ph
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for.end19:
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ret void
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}
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; CHECK: --- !Missed
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; CHECK-NEXT: Pass: loop-interchange
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; CHECK-NEXT: Name: Dependence
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; CHECK-NEXT: Function: test01
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; CHECK-NEXT: Args:
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; CHECK-NEXT: - String: Cannot interchange loops due to dependences.
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; CHECK-NEXT: ...
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;;--------------------------------------Test case 02------------------------------------
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;; [FIXME] This loop though valid is currently not interchanged due to the
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;; limitation that we cannot split the inner loop latch due to multiple use of inner induction
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;; variable.(used to increment the loop counter and to access A[j+1][i+1]
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;; for(int i=0;i<N-1;i++)
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;; for(int j=1;j<N-1;j++)
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;; A[j+1][i+1] = A[j+1][i+1] + k;
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define void @test02(i32 %k, i32 %N) {
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entry:
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%sub = add nsw i32 %N, -1
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%cmp26 = icmp sgt i32 %N, 1
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br i1 %cmp26, label %for.cond1.preheader.lr.ph, label %for.end17
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for.cond1.preheader.lr.ph:
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%cmp324 = icmp sgt i32 %sub, 1
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%0 = add i32 %N, -2
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%1 = sext i32 %sub to i64
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br label %for.cond1.preheader
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for.cond.loopexit:
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%cmp = icmp slt i64 %indvars.iv.next29, %1
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br i1 %cmp, label %for.cond1.preheader, label %for.end17
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for.cond1.preheader:
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%indvars.iv28 = phi i64 [ 0, %for.cond1.preheader.lr.ph ], [ %indvars.iv.next29, %for.cond.loopexit ]
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%indvars.iv.next29 = add nuw nsw i64 %indvars.iv28, 1
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br i1 %cmp324, label %for.body4, label %for.cond.loopexit
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for.body4:
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body4 ], [ 1, %for.cond1.preheader ]
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%arrayidx7 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv.next, i64 %indvars.iv.next29
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%2 = load i32, i32* %arrayidx7
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%add8 = add nsw i32 %2, %k
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store i32 %add8, i32* %arrayidx7
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%lftr.wideiv = trunc i64 %indvars.iv to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %0
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br i1 %exitcond, label %for.cond.loopexit, label %for.body4
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for.end17:
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ret void
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}
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; CHECK: --- !Missed
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; CHECK-NEXT: Pass: loop-interchange
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; CHECK-NEXT: Name: Dependence
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; CHECK-NEXT: Function: test02
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; CHECK-NEXT: Args:
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; CHECK-NEXT: - String: Cannot interchange loops due to dependences.
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; CHECK-NEXT: ...
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;;-----------------------------------Test case 03-------------------------------
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;; Test to make sure we can handle output dependencies.
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;;
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;; for (int i = 0; i < 2; ++i)
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;; for(int j = 0; j < 3; ++j) {
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;; A[j][i] = i;
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;; A[j][i+1] = j;
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;; }
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@A10 = local_unnamed_addr global [3 x [3 x i32]] zeroinitializer, align 16
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define void @test03() {
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entry:
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br label %for.cond1.preheader
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for.cond.loopexit: ; preds = %for.body4
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%exitcond28 = icmp ne i64 %indvars.iv.next27, 2
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br i1 %exitcond28, label %for.cond1.preheader, label %for.cond.cleanup
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for.cond1.preheader: ; preds = %for.cond.loopexit, %entry
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%indvars.iv26 = phi i64 [ 0, %entry ], [ %indvars.iv.next27, %for.cond.loopexit ]
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%indvars.iv.next27 = add nuw nsw i64 %indvars.iv26, 1
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br label %for.body4
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for.cond.cleanup: ; preds = %for.cond.loopexit
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ret void
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for.body4: ; preds = %for.body4, %for.cond1.preheader
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%indvars.iv = phi i64 [ 0, %for.cond1.preheader ], [ %indvars.iv.next, %for.body4 ]
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%arrayidx6 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* @A10, i64 0, i64 %indvars.iv, i64 %indvars.iv26
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%tmp = trunc i64 %indvars.iv26 to i32
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store i32 %tmp, i32* %arrayidx6, align 4
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%arrayidx10 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* @A10, i64 0, i64 %indvars.iv, i64 %indvars.iv.next27
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%tmp1 = trunc i64 %indvars.iv to i32
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store i32 %tmp1, i32* %arrayidx10, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp ne i64 %indvars.iv.next, 3
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br i1 %exitcond, label %for.body4, label %for.cond.loopexit
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}
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; CHECK: --- !Missed
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; CHECK-NEXT: Pass: loop-interchange
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; CHECK-NEXT: Name: Dependence
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; CHECK-NEXT: Function: test03
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; CHECK-NEXT: Args:
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; CHECK-NEXT: - String: Cannot interchange loops due to dependences.
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; CHECK-NEXT: ...
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;;--------------------------------------Test case 04-------------------------------------
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;; Loops not tightly nested are not interchanged
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;; for(int j=0;j<N;j++) {
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;; B[j] = j+k;
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;; for(int i=0;i<N;i++)
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;; A[j][i] = A[j][i]+B[j];
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;; }
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define void @test04(i32 %k, i32 %N){
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entry:
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%cmp30 = icmp sgt i32 %N, 0
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br i1 %cmp30, label %for.body.lr.ph, label %for.end17
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for.body.lr.ph:
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%0 = add i32 %N, -1
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%1 = zext i32 %k to i64
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br label %for.body
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for.body:
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%indvars.iv32 = phi i64 [ 0, %for.body.lr.ph ], [ %indvars.iv.next33, %for.inc15 ]
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%2 = add nsw i64 %indvars.iv32, %1
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%arrayidx = getelementptr inbounds [100 x i32], [100 x i32]* @C, i64 0, i64 %indvars.iv32
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%3 = trunc i64 %2 to i32
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store i32 %3, i32* %arrayidx
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br label %for.body3
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for.body3:
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%indvars.iv = phi i64 [ 0, %for.body ], [ %indvars.iv.next, %for.body3 ]
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%arrayidx7 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv32, i64 %indvars.iv
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%4 = load i32, i32* %arrayidx7
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%add10 = add nsw i32 %3, %4
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store i32 %add10, i32* %arrayidx7
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %0
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br i1 %exitcond, label %for.inc15, label %for.body3
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for.inc15:
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%indvars.iv.next33 = add nuw nsw i64 %indvars.iv32, 1
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%lftr.wideiv35 = trunc i64 %indvars.iv32 to i32
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%exitcond36 = icmp eq i32 %lftr.wideiv35, %0
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br i1 %exitcond36, label %for.end17, label %for.body
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for.end17:
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ret void
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}
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; CHECK: --- !Missed
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; CHECK-NEXT: Pass: loop-interchange
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; CHECK-NEXT: Name: Dependence
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; CHECK-NEXT: Function: test04
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; CHECK-NEXT: Args:
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; CHECK-NEXT: - String: Cannot interchange loops due to dependences.
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; CHECK-NEXT: ...
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