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34 lines
1.5 KiB
LLVM
34 lines
1.5 KiB
LLVM
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; RUN: opt -analyze -scalar-evolution -scalar-evolution-max-add-rec-size=3 < %s | FileCheck %s
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; Show that we are able to avoid creation of huge SCEVs by capping the max
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; AddRec size.
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define i32 @test_01(i32 %a, i32 %b) {
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; CHECK-LABEL: Classifying expressions for: @test_01
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; CHECK-NEXT: %iv = phi i32 [ %a, %entry ], [ %iv.next, %loop ]
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; CHECK-NEXT: --> {%a,+,%b}<%loop> U: full-set S: full-set
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; CHECK-NEXT: %iv.next = add i32 %iv, %b
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; CHECK-NEXT: --> {(%a + %b),+,%b}<%loop> U: full-set S: full-set
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; CHECK-NEXT: %x1 = mul i32 %iv, %iv.next
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; CHECK-NEXT: --> {((%a + %b) * %a),+,(((2 * %a) + (2 * %b)) * %b),+,(2 * %b * %b)}<%loop> U: full-set S: full-set
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; CHECK-NEXT: %x2 = mul i32 %x1, %x1
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; CHECK-NEXT: --> ({((%a + %b) * %a),+,(((2 * %a) + (2 * %b)) * %b),+,(2 * %b * %b)}<%loop> * {((%a + %b) * %a),+,(((2 * %a) + (2 * %b)) * %b),+,(2 * %b * %b)}<%loop>) U: full-set S: full-set
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; CHECK-NEXT: %x3 = mul i32 %x2, %x1
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; CHECK-NEXT: --> ({((%a + %b) * %a),+,(((2 * %a) + (2 * %b)) * %b),+,(2 * %b * %b)}<%loop> * {((%a + %b) * %a),+,(((2 * %a) + (2 * %b)) * %b),+,(2 * %b * %b)}<%loop> * {((%a + %b) * %a),+,(((2 * %a) + (2 * %b)) * %b),+,(2 * %b * %b)}<%loop>) U: full-set S: full-set
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entry:
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br label %loop
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loop:
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%iv = phi i32 [ %a, %entry ], [ %iv.next, %loop ]
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%iv.next = add i32 %iv, %b
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%cond = icmp slt i32 %iv.next, 1000
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br i1 %cond, label %loop, label %exit
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exit:
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%x1 = mul i32 %iv, %iv.next
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%x2 = mul i32 %x1, %x1
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%x3 = mul i32 %x2, %x1
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ret i32 %x3
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}
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