derek.holloway
7502bf64a4
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32 lines
1.5 KiB
LLVM
32 lines
1.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 4
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; RUN: opt -disable-output "-passes=print<scalar-evolution>" -scalar-evolution-classify-expressions=0 < %s 2>&1 | FileCheck %s
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; ScalarEvolution should be able to use nsw information to prove that
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; this loop has a finite trip count.
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define void @le(i64 %n, ptr nocapture %p) nounwind {
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; CHECK-LABEL: 'le'
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; CHECK-NEXT: Determining loop execution counts for: @le
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; CHECK-NEXT: Loop %for.body: backedge-taken count is %n
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; CHECK-NEXT: Loop %for.body: constant max backedge-taken count is i64 9223372036854775807
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; CHECK-NEXT: Loop %for.body: symbolic max backedge-taken count is %n
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; CHECK-NEXT: Loop %for.body: Trip multiple is 1
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;
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entry:
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%cmp6 = icmp slt i64 %n, 0 ; <i1> [#uses=1]
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br i1 %cmp6, label %for.end, label %for.body
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for.body: ; preds = %for.body, %entry
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%i = phi i64 [ %i.next, %for.body ], [ 0, %entry ] ; <i64> [#uses=2]
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%arrayidx = getelementptr double, ptr %p, i64 %i ; <ptr> [#uses=2]
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%t4 = load double, ptr %arrayidx ; <double> [#uses=1]
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%mul = fmul double %t4, 2.200000e+00 ; <double> [#uses=1]
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store double %mul, ptr %arrayidx
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%i.next = add nsw i64 %i, 1 ; <i64> [#uses=2]
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%cmp = icmp sgt i64 %i.next, %n ; <i1> [#uses=1]
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br i1 %cmp, label %for.end, label %for.body
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for.end: ; preds = %for.body, %entry
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ret void
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}
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