derek.holloway
7502bf64a4
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44 lines
1.4 KiB
LLVM
44 lines
1.4 KiB
LLVM
; RUN: opt -verify-loop-info -irce-print-changed-loops -passes=irce -irce-min-eliminated-checks=3 < %s 2>&1 | FileCheck %s --check-prefixes=CHECK-NO
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; RUN: opt -verify-loop-info -irce-print-changed-loops -passes=irce -irce-min-eliminated-checks=0 < %s 2>&1 | FileCheck %s --check-prefixes=CHECK-YES
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; CHECK-YES: constrained Loop
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; CHECK-NO-NOT: constrained Loop
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define i32 @multiple_access_no_preloop(
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ptr %arr_a, ptr %a_len_ptr, ptr %arr_b, ptr %b_len_ptr, i32 %n) {
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entry:
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%len.a = load i32, ptr %a_len_ptr, !range !0
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%first.itr.check = icmp sgt i32 %n, 0
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br i1 %first.itr.check, label %loop, label %exit, !prof !1
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loop:
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%idx = phi i32 [ 0, %entry ] , [ %idx.next, %backedge ]
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%idx.next = add i32 %idx, 1
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%abc.a = icmp slt i32 %idx, %len.a
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br i1 %abc.a, label %in.bounds.a, label %exit, !prof !2
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in.bounds.a:
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%addr.a = getelementptr i32, ptr %arr_a, i32 %idx
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%val = load i32, ptr %addr.a
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%cond = icmp ne i32 %val, 0
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; Most probable exit from a loop.
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br i1 %cond, label %found, label %backedge, !prof !3
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backedge:
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%next = icmp slt i32 %idx.next, %n
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br i1 %next, label %loop, label %exit, !prof !4
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found:
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ret i32 %val
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exit:
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ret i32 0
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}
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!0 = !{i32 0, i32 2147483647}
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!1 = !{!"branch_weights", i32 1024, i32 1}
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!2 = !{!"branch_weights", i32 512, i32 1}
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!3 = !{!"branch_weights", i32 1, i32 2}
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!4 = !{!"branch_weights", i32 512, i32 1}
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