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99dd11f7e8
Summary: This is largely NFC*, in preparation for utilizing ProfileSummaryInfo and BranchFrequencyInfo analyses. In this patch I am only doing the splitting for the New PM, but I can do the same for the legacy PM as a follow-on if this looks good. *Not NFC since for partial unrolling we lose the updates done to the loop traversal (adding new sibling and child loops) - according to Chandler this is not very useful for partial unrolling, but it also means that the debugging flag -unroll-revisit-child-loops no longer works for partial unrolling. Reviewers: chandlerc Subscribers: mehdi_amini, mzolotukhin, eraman, llvm-commits Differential Revision: https://reviews.llvm.org/D36157 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@309886 91177308-0d34-0410-b5e6-96231b3b80d8
37 lines
732 B
LLVM
37 lines
732 B
LLVM
; RUN: opt -S < %s -loop-unroll -block-freq | FileCheck %s
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; RUN: opt -S < %s -passes='require<opt-remark-emit>,unroll,require<block-freq>' | FileCheck %s
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; Crasher from PR20987.
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; CHECK: define void @update_loop_info_in_subloops
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; CHECK: entry:
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; CHECK: L:
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; CHECK: L.inner:
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; CHECK: L.inner.latch:
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; CHECK: L.latch:
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; CHECK: L.inner.1:
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; CHECK: L.inner.latch.1:
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; CHECK: L.latch.1:
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define void @update_loop_info_in_subloops() {
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entry:
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br label %L
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L:
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%0 = phi i64 [ 1, %entry ], [ %1, %L.latch ]
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br label %L.inner
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L.inner:
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br label %L.inner.latch
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L.inner.latch:
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br i1 false, label %L.latch, label %L.inner
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L.latch:
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%1 = add i64 %0, 1
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%2 = icmp eq i64 %1, 3
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br i1 %2, label %exit, label %L
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exit:
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ret void
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}
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