derek.holloway
7502bf64a4
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71 lines
2.9 KiB
LLVM
71 lines
2.9 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt -passes=loop-fusion -disable-output -stats < %s 2>&1 | FileCheck -check-prefix=STAT %s
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; STAT: 1 loop-fusion - Loops fused
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; XFAIL: *
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; Currently fails since delinearization doesn't work as expected. The estimated
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; array size is different for `Array[i][i]` and `Array[i][j]`. The former is
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; now regarded as an access to a 1D array.
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; C Code
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;
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;; for (int i = 0; i < 100; ++i)
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;; Array[i][i] = -i;
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;; for (int row = 0; row < 100; ++row)
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;; for (int col = 0; col < 100; ++col)
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;; if (col != row)
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;; Array[row][col] = row + col;
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;
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; Loop fusion should not crash anymore as now forgetBlockAndLoopDispositions()
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; is trigerred after mergeLatch() during the fusion.
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define i32 @forget_dispositions() nounwind {
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entry:
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%Array = alloca [100 x [100 x i32]], align 4
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv33 = phi i64 [ 0, %entry ], [ %indvars.iv.next34, %for.body ]
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%0 = trunc i64 %indvars.iv33 to i32
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%sub = sub i32 0, %0
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%arrayidx2 = getelementptr inbounds [100 x [100 x i32]], ptr %Array, i64 0, i64 %indvars.iv33, i64 %indvars.iv33
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store i32 %sub, ptr %arrayidx2, align 4
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%indvars.iv.next34 = add i64 %indvars.iv33, 1
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%lftr.wideiv35 = trunc i64 %indvars.iv.next34 to i32
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%exitcond36 = icmp eq i32 %lftr.wideiv35, 100
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br i1 %exitcond36, label %for.cond6.preheader, label %for.body
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for.cond6.preheader: ; preds = %for.body, %for.inc17
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%indvars.iv29 = phi i64 [ %indvars.iv.next30, %for.inc17 ], [ 0, %for.body ]
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br label %for.body8
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for.body8: ; preds = %for.inc14, %for.cond6.preheader
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%indvars.iv = phi i64 [ 0, %for.cond6.preheader ], [ %indvars.iv.next, %for.inc14 ]
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%1 = trunc i64 %indvars.iv to i32
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%2 = trunc i64 %indvars.iv29 to i32
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%cmp9 = icmp eq i32 %1, %2
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br i1 %cmp9, label %for.inc14, label %if.then
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if.then: ; preds = %for.body8
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%3 = add i64 %indvars.iv, %indvars.iv29
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%arrayidx13 = getelementptr inbounds [100 x [100 x i32]], ptr %Array, i64 0, i64 %indvars.iv29, i64 %indvars.iv
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%4 = trunc i64 %3 to i32
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store i32 %4, ptr %arrayidx13, align 4
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br label %for.inc14
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for.inc14: ; preds = %for.body8, %if.then
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%indvars.iv.next = add i64 %indvars.iv, 1
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%lftr.wideiv27 = trunc i64 %indvars.iv.next to i32
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%exitcond28 = icmp eq i32 %lftr.wideiv27, 100
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br i1 %exitcond28, label %for.inc17, label %for.body8
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for.inc17: ; preds = %for.inc14
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%indvars.iv.next30 = add i64 %indvars.iv29, 1
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%lftr.wideiv31 = trunc i64 %indvars.iv.next30 to i32
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%exitcond32 = icmp eq i32 %lftr.wideiv31, 100
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br i1 %exitcond32, label %for.exit, label %for.cond6.preheader
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for.exit: ; preds = %for.inc17
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ret i32 0
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}
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