derek.holloway
7502bf64a4
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118 lines
3.2 KiB
LLVM
118 lines
3.2 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt < %s -passes=loop-interchange -verify-dom-info -verify-loop-info -S -debug 2>&1 | FileCheck %s
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@A = common global [100 x [100 x i64]] zeroinitializer
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@N = dso_local local_unnamed_addr global i64 100, align 8
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; for(int i=0;i<100;i++)
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; for(int j=0;j<i;j++)
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; A[j][i] = A[j][i]+k;
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;
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; Inner loop induction variable exit condition depends on the
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; outer loop induction variable, i.e., triangular loops.
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;
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; CHECK: Loop structure not understood by pass
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; CHECK: Cannot prove legality, not interchanging loops 'for1.header' and 'for2'
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;
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define void @interchange_01(i64 %k) {
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entry:
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br label %for1.header
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for1.header:
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%i = phi i64 [ 0, %entry ], [ %i.next, %for1.inc10 ]
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br label %for2
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for2:
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%j = phi i64 [ %j.next, %for2 ], [ 0, %for1.header ]
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%arrayidx5 = getelementptr inbounds [100 x [100 x i64]], ptr @A, i64 0, i64 %j, i64 %i
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%lv = load i64, ptr %arrayidx5
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%add = add nsw i64 %lv, %k
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store i64 %add, ptr %arrayidx5
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%j.next = add nuw nsw i64 %j, 1
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%exitcond = icmp eq i64 %j, %i
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br i1 %exitcond, label %for1.inc10, label %for2
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for1.inc10:
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%i.next = add nuw nsw i64 %i, 1
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%exitcond26 = icmp eq i64 %i, 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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; for(int i=0;i<100;i++)
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; for(int j=0;j+i<100;j++)
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; A[j][i] = A[j][i]+k;
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;
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; Inner loop induction variable exit condition depends on the
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; outer loop induction variable, i.e., triangular loops.
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;
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; CHECK: Loop structure not understood by pass
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; CHECK: Cannot prove legality, not interchanging loops 'for1.header' and 'for2'
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;
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define void @interchange_02(i64 %k) {
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entry:
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br label %for1.header
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for1.header:
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%i = phi i64 [ 0, %entry ], [ %i.next, %for1.inc10 ]
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br label %for2
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for2:
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%j = phi i64 [ %j.next, %for2 ], [ 0, %for1.header ]
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%arrayidx5 = getelementptr inbounds [100 x [100 x i64]], ptr @A, i64 0, i64 %j, i64 %i
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%lv = load i64, ptr %arrayidx5
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%add = add nsw i64 %lv, %k
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store i64 %add, ptr %arrayidx5
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%0 = add nuw nsw i64 %j, %i
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%j.next = add nuw nsw i64 %j, 1
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%exitcond = icmp eq i64 %0, 100
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br i1 %exitcond, label %for1.inc10, label %for2
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for1.inc10:
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%i.next = add nuw nsw i64 %i, 1
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%exitcond26 = icmp eq i64 %i, 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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; for(int i=0;i<100;i++)
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; for(int j=0;i>j;j++)
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; A[j][i] = A[j][i]+k;
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;
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; Inner loop induction variable exit condition depends on the
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; outer loop induction variable, i.e., triangular loops.
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; CHECK: Loop structure not understood by pass
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; CHECK: Cannot prove legality, not interchanging loops 'for1.header' and 'for2'
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;
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define void @interchange_03(i64 %k) {
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entry:
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br label %for1.header
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for1.header:
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%i = phi i64 [ 0, %entry ], [ %i.next, %for1.inc10 ]
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br label %for2
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for2:
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%j = phi i64 [ %j.next, %for2 ], [ 0, %for1.header ]
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%arrayidx5 = getelementptr inbounds [100 x [100 x i64]], ptr @A, i64 0, i64 %j, i64 %i
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%lv = load i64, ptr %arrayidx5
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%add = add nsw i64 %lv, %k
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store i64 %add, ptr %arrayidx5
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%j.next = add nuw nsw i64 %j, 1
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%exitcond = icmp ne i64 %i, %j
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br i1 %exitcond, label %for2, label %for1.inc10
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for1.inc10:
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%i.next = add nuw nsw i64 %i, 1
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%exitcond26 = icmp eq i64 %i, 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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