derek.holloway
7502bf64a4
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70 lines
2.9 KiB
LLVM
70 lines
2.9 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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define i32 @multiple_exits_with_predicates(ptr %src1, ptr readonly %src2, i32 %end) {
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; CHECK-LABEL: 'multiple_exits_with_predicates'
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; CHECK-NEXT: Determining loop execution counts for: @multiple_exits_with_predicates
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; CHECK-NEXT: Loop %for.body: <multiple exits> Unpredictable backedge-taken count.
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; CHECK-NEXT: exit count for for.body: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: predicated exit count for for.body: i32 1023
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: {1,+,1}<%for.body> Added Flags: <nusw>
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; CHECK-EMPTY:
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; CHECK-NEXT: exit count for for.work: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: exit count for for.inc: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: predicated exit count for for.inc: (-1 + (1 umax %end))
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: {1,+,1}<%for.body> Added Flags: <nusw>
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; CHECK-EMPTY:
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; CHECK-NEXT: Loop %for.body: Unpredictable constant max backedge-taken count.
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; CHECK-NEXT: Loop %for.body: Unpredictable symbolic max backedge-taken count.
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; CHECK-NEXT: symbolic max exit count for for.body: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: predicated symbolic max exit count for for.body: i32 1023
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: {1,+,1}<%for.body> Added Flags: <nusw>
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; CHECK-EMPTY:
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; CHECK-NEXT: symbolic max exit count for for.work: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: symbolic max exit count for for.inc: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: predicated symbolic max exit count for for.inc: (-1 + (1 umax %end))
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: {1,+,1}<%for.body> Added Flags: <nusw>
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; CHECK-EMPTY:
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; CHECK-NEXT: Loop %for.body: Predicated constant max backedge-taken count is i32 1023
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: {1,+,1}<%for.body> Added Flags: <nusw>
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; CHECK-NEXT: {1,+,1}<%for.body> Added Flags: <nusw>
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; CHECK-NEXT: Loop %for.body: Predicated symbolic max backedge-taken count is (1023 umin (-1 + (1 umax %end)))
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; CHECK-NEXT: Predicates:
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; CHECK-NEXT: {1,+,1}<%for.body> Added Flags: <nusw>
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; CHECK-NEXT: {1,+,1}<%for.body> Added Flags: <nusw>
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;
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entry:
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br label %for.body
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for.body:
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%index = phi i8 [ %index.next, %for.inc ], [ 0, %entry ]
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%index.next = add i8 %index, 1
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%conv = zext i8 %index.next to i32
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%cmp.body = icmp ne i32 %conv, 1024
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br i1 %cmp.body, label %for.work, label %exit
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for.work:
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%arrayidx = getelementptr inbounds i32, ptr %src1, i8 %index
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%0 = load i32, ptr %arrayidx, align 4
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%arrayidx3 = getelementptr inbounds i32, ptr %src2, i8 %index
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%1 = load i32, ptr %arrayidx3, align 4
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%cmp.work = icmp eq i32 %0, %1
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br i1 %cmp.work, label %found, label %for.inc
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for.inc:
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%cmp.inc = icmp ult i32 %conv, %end
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br i1 %cmp.inc, label %for.body, label %exit
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found:
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ret i32 1
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exit:
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ret i32 0
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}
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