83 lines
2.9 KiB
LLVM
83 lines
2.9 KiB
LLVM
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; RUN: opt -irce -S < %s 2>&1 | FileCheck %s
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; RUN: opt -passes='require<branch-prob>,irce' -S < %s 2>&1 | FileCheck %s
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; test that the pre and post loops have loop metadata which disables any further
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; loop optimizations.
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; generates a post loop, which should have metadata !llvm.loop !2
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; Function Attrs: alwaysinline
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define void @inner_loop(i32* %arr, i32* %a_len_ptr, i32 %n) #0 {
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; CHECK-LABEL: inner_loop(
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; CHECK-LABEL: in.bounds.postloop
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; CHECK: br i1 %next.postloop, label %loop.postloop, label %exit.loopexit.loopexit, !llvm.loop !2, !irce.loop.clone !7
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entry:
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%len = load i32, i32* %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
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loop: ; preds = %in.bounds, %entry
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%idx = phi i32 [ 0, %entry ], [ %idx.next, %in.bounds ]
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%idx.next = add i32 %idx, 1
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%abc = icmp slt i32 %idx, %len
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br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !1
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in.bounds: ; preds = %loop
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%addr = getelementptr i32, i32* %arr, i32 %idx
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store i32 0, i32* %addr
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%next = icmp slt i32 %idx.next, %n
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br i1 %next, label %loop, label %exit
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out.of.bounds: ; preds = %loop
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ret void
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exit: ; preds = %in.bounds, %entry
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ret void
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}
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; add loop metadata for pre and post loops
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define void @single_access_with_preloop(i32 *%arr, i32 *%a_len_ptr, i32 %n, i32 %offset) {
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; CHECK-LABEL: @single_access_with_preloop(
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; CHECK-LABEL: in.bounds.preloop
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; CHECK: br i1 [[COND:%[^ ]+]], label %loop.preloop, label %preloop.exit.selector, !llvm.loop !8, !irce.loop.clone !7
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; CHECK-LABEL: in.bounds.postloop
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; CHECK: br i1 %next.postloop, label %loop.postloop, label %exit.loopexit.loopexit, !llvm.loop !9, !irce.loop.clone !7
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entry:
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%len = load i32, i32* %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
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loop:
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%idx = phi i32 [ 0, %entry ] , [ %idx.next, %in.bounds ]
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%idx.next = add i32 %idx, 1
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%array.idx = add i32 %idx, %offset
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%abc.high = icmp slt i32 %array.idx, %len
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%abc.low = icmp sge i32 %array.idx, 0
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%abc = and i1 %abc.low, %abc.high
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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, i32* %arr, i32 %array.idx
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store i32 0, i32* %addr
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%next = icmp slt i32 %idx.next, %n
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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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attributes #0 = { alwaysinline }
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!0 = !{i32 0, i32 2147483647}
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!1 = !{!"branch_weights", i32 64, i32 4}
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!2 = distinct !{!2, !3, !4, !5, !6}
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!3 = !{!"llvm.loop.unroll.disable"}
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!4 = !{!"llvm.loop.vectorize.enable", i1 false}
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!5 = !{!"llvm.loop.licm_versioning.disable"}
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!6 = !{!"llvm.loop.distribute.enable", i1 false}
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!7 = !{}
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!8 = distinct !{!8, !3, !4, !5}
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!9 = distinct !{!9, !3, !4, !5}
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