0d38f21e4a
This extends the work from 7755c26 to all of the different backend taken count kinds that we print for the scev analysis printer. As before, the goal is to cut down on confusion as i4 -1 is a very different (unsigned) value from i32 -1.
63 lines
2.1 KiB
LLVM
63 lines
2.1 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 void @f(i32 %n, ptr %ptr) {
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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 %loop: <multiple exits> Unpredictable backedge-taken count.
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; CHECK-NEXT: exit count for loop: i32 0
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; CHECK-NEXT: exit count for be: ***COULDNOTCOMPUTE***
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; CHECK-NEXT: Loop %loop: constant max backedge-taken count is i32 0
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; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is i32 0
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; CHECK-NEXT: symbolic max exit count for loop: i32 0
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; CHECK-NEXT: symbolic max exit count for be: ***COULDNOTCOMPUTE***
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;
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entry:
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br label %loop
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loop:
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%iv = phi i32 [ 0, %entry ], [ %iv.inc, %be ]
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%iv.inc = add i32 %iv, 1
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%unswitch_cond_root = icmp ne i32 %iv.inc, 42
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%us.0 = and i1 %unswitch_cond_root, %unswitch_cond_root
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%us.1 = and i1 %us.0, %us.0
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%us.2 = and i1 %us.1, %us.1
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%us.3 = and i1 %us.2, %us.2
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%us.4 = and i1 %us.3, %us.3
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%us.5 = and i1 %us.4, %us.4
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%us.6 = and i1 %us.5, %us.5
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%us.7 = and i1 %us.6, %us.6
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%us.8 = and i1 %us.7, %us.7
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%us.9 = and i1 %us.8, %us.8
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%us.10 = and i1 %us.9, %us.9
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%us.11 = and i1 %us.10, %us.10
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%us.12 = and i1 %us.11, %us.11
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%us.13 = and i1 %us.12, %us.12
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%us.14 = and i1 %us.13, %us.13
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%us.15 = and i1 %us.14, %us.14
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%us.16 = and i1 %us.15, %us.15
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%us.17 = and i1 %us.16, %us.16
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%us.18 = and i1 %us.17, %us.17
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%us.19 = and i1 %us.18, %us.18
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%us.20 = and i1 %us.19, %us.19
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%us.21 = and i1 %us.20, %us.20
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%us.22 = and i1 %us.21, %us.21
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%us.23 = and i1 %us.22, %us.22
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%us.24 = and i1 %us.23, %us.23
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%us.25 = and i1 %us.24, %us.24
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%us.26 = and i1 %us.25, %us.25
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%us.27 = and i1 %us.26, %us.26
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%us.28 = and i1 %us.27, %us.27
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%us.29 = and i1 %us.28, %us.28
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br i1 %us.29, label %leave, label %be
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be:
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store volatile i32 0, ptr %ptr
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%becond = icmp ult i32 %iv.inc, %n
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br i1 %becond, label %leave, label %loop
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leave:
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ret void
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}
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