derek.holloway
7502bf64a4
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43 lines
1.8 KiB
LLVM
43 lines
1.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 4
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; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" -scalar-evolution-classify-expressions=0 2>&1 2>&1 | FileCheck %s
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; This is a tricky testcase for unsigned wrap detection which ScalarEvolution
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; doesn't yet know how to do.
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define i32 @f(i32 %x) nounwind readnone {
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;
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; CHECK-LABEL: 'f'
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; CHECK-NEXT: Determining loop execution counts for: @f
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; CHECK-NEXT: Loop %bb: backedge-taken count is (((-3 + (-1 * (1 umin (-3 + (-1 * %x) + (1000 umax (3 + %x)))))<nuw><nsw> + (-1 * %x) + (1000 umax (3 + %x))) /u 3) + (1 umin (-3 + (-1 * %x) + (1000 umax (3 + %x)))))
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; CHECK-NEXT: Loop %bb: constant max backedge-taken count is i32 334
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; CHECK-NEXT: Loop %bb: symbolic max backedge-taken count is (((-3 + (-1 * (1 umin (-3 + (-1 * %x) + (1000 umax (3 + %x)))))<nuw><nsw> + (-1 * %x) + (1000 umax (3 + %x))) /u 3) + (1 umin (-3 + (-1 * %x) + (1000 umax (3 + %x)))))
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; CHECK-NEXT: Loop %bb: Trip multiple is 1
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;
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entry:
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%0 = icmp ugt i32 %x, 999 ; <i1> [#uses=1]
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br i1 %0, label %bb2, label %bb.nph
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bb.nph: ; preds = %entry
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br label %bb
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bb: ; preds = %bb.nph, %bb1
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%indvar = phi i32 [ 0, %bb.nph ], [ %indvar.next, %bb1 ] ; <i32> [#uses=2]
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%tmp = mul i32 %indvar, 3 ; <i32> [#uses=1]
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%x_addr.04 = add i32 %tmp, %x ; <i32> [#uses=1]
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%1 = add i32 %x_addr.04, 3 ; <i32> [#uses=2]
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br label %bb1
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bb1: ; preds = %bb
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%2 = icmp ugt i32 %1, 999 ; <i1> [#uses=1]
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%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=1]
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br i1 %2, label %bb1.bb2_crit_edge, label %bb
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bb1.bb2_crit_edge: ; preds = %bb1
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%.lcssa = phi i32 [ %1, %bb1 ] ; <i32> [#uses=1]
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br label %bb2
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bb2: ; preds = %bb1.bb2_crit_edge, %entry
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%x_addr.0.lcssa = phi i32 [ %.lcssa, %bb1.bb2_crit_edge ], [ %x, %entry ] ; <i32> [#uses=1]
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ret i32 %x_addr.0.lcssa
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}
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