forked from OSchip/llvm-project
98 lines
3.3 KiB
LLVM
98 lines
3.3 KiB
LLVM
; RUN: opt < %s -basicaa -loop-interchange -pass-remarks-missed='loop-interchange' \
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; RUN: -pass-remarks-output=%t -verify-loop-info -verify-dom-info -S | FileCheck -check-prefix=IR %s
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; RUN: FileCheck --input-file=%t %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@A = common global [100 x [100 x i32]] zeroinitializer
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@B = common global [100 x [100 x [100 x i32]]] zeroinitializer
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@C = common global [100 x [100 x i64]] zeroinitializer
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;;--------------------------------------Test case 01------------------------------------
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;; [FIXME] This loop though valid is currently not interchanged due to the 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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; FIXME: Currently fails because of DA changes.
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; IR-LABEL: @interchange_01
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; IR-NOT: split
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; CHECK: Name: Dependence
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; CHECK-NEXT: Function: interchange_01
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define void @interchange_01(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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; When currently cannot interchange this loop, because transform currently
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; expects the latches to be the exiting blocks too.
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; IR-LABEL: @interchange_02
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; IR-NOT: split
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;
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; CHECK: Name: ExitingNotLatch
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; CHECK-NEXT: Function: interchange_02
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define void @interchange_02(i64 %k, i64 %N) {
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entry:
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br label %for1.header
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for1.header:
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%j23 = phi i64 [ 0, %entry ], [ %j.next24, %for1.inc10 ]
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br label %for2
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for2:
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%j = phi i64 [ %j.next, %latch ], [ 0, %for1.header ]
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%arrayidx5 = getelementptr inbounds [100 x [100 x i64]], [100 x [100 x i64]]* @C, i64 0, i64 %j, i64 %j23
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%lv = load i64, i64* %arrayidx5
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%add = add nsw i64 %lv, %k
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store i64 %add, i64* %arrayidx5
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%exitcond = icmp eq i64 %j, 99
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br i1 %exitcond, label %for1.inc10, label %latch
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latch:
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%j.next = add nuw nsw i64 %j, 1
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br label %for2
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for1.inc10:
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%j.next24 = add nuw nsw i64 %j23, 1
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%exitcond26 = icmp eq i64 %j23, 99
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br i1 %exitcond26, label %for.end12, label %for1.header
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for.end12:
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ret void
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}
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