derek.holloway
7502bf64a4
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35 lines
1.3 KiB
LLVM
35 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 2
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; RUN: opt -passes='print<scalar-evolution>' -scalar-evolution-classify-expressions=0 -disable-output %s 2>&1 | FileCheck %s
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define void @max_btc_improved_by_applying_guards_to_add_subexpr(i32 %low, i32 %high) {
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; CHECK-LABEL: 'max_btc_improved_by_applying_guards_to_add_subexpr'
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; CHECK-NEXT: Determining loop execution counts for: @max_btc_improved_by_applying_guards_to_add_subexpr
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; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + (zext i32 (1 + (-1 * %low) + %high) to i64))<nsw>
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; CHECK-NEXT: Loop %loop: constant max backedge-taken count is i64 7
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; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is (-1 + (zext i32 (1 + (-1 * %low) + %high) to i64))<nsw>
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; CHECK-NEXT: Loop %loop: Trip multiple is 1
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;
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entry:
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%sub = sub i32 %high, %low
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%pre.1 = icmp slt i32 %sub, 8
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br i1 %pre.1, label %if.then, label %exit
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if.then:
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%pre.2 = icmp slt i32 %sub, 0
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br i1 %pre.2, label %exit, label %ph
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ph:
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%add.1 = add i32 %sub, 1
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%wide.trip.count = zext i32 %add.1 to i64
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br label %loop
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loop:
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%iv = phi i64 [ 0, %ph ], [ %iv.next, %loop ]
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%iv.next = add i64 %iv, 1
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%ec = icmp eq i64 %iv.next, %wide.trip.count
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br i1 %ec, label %exit, label %loop
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exit:
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ret void
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}
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