derek.holloway
7502bf64a4
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38 lines
1.3 KiB
LLVM
38 lines
1.3 KiB
LLVM
; RUN: opt -irce-print-range-checks -irce-print-changed-loops -verify-loop-info -passes=irce < %s 2>&1 | FileCheck %s
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; RUN: opt -irce-print-range-checks -irce-print-changed-loops -verify-loop-info -passes='require<branch-prob>,irce' < %s 2>&1 | FileCheck %s
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; CHECK: irce: loop has 1 inductive range checks:
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; CHECK-NEXT: InductiveRangeCheck:
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; CHECK-NEXT: Begin: (-1 + %n) Step: -1 End: 2147483647
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; CHECK-NEXT: CheckUse: br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !1 Operand: 0
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; CHECK-NEXT: irce: in function only_lower_check: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting>
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define void @only_lower_check(ptr %arr, ptr %a_len_ptr, i32 %n) {
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entry:
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%len = load i32, ptr %a_len_ptr, !range !0
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%first.itr.check = icmp sgt i32 %n, 0
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%start = sub i32 %n, 1
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br i1 %first.itr.check, label %loop, label %exit
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loop:
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%idx = phi i32 [ %start, %entry ] , [ %idx.dec, %in.bounds ]
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%idx.dec = sub i32 %idx, 1
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%abc = icmp sge i32 %idx, 0
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br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !1
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in.bounds:
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%addr = getelementptr i32, ptr %arr, i32 %idx
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store i32 0, ptr %addr
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%next = icmp sgt i32 %idx.dec, -1
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br i1 %next, label %loop, label %exit
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out.of.bounds:
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ret void
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exit:
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ret void
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}
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!0 = !{i32 0, i32 2147483647}
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!1 = !{!"branch_weights", i32 64, i32 4}
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