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