forked from OSchip/llvm-project
82 lines
3.0 KiB
LLVM
82 lines
3.0 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt < %s -S -debug-only=loop-unroll -loop-unroll -unroll-runtime -unroll-peel-multi-deopt-exit 2>&1 | FileCheck %s
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; RUN: opt < %s -S -debug-only=loop-unroll -unroll-peel-multi-deopt-exit -passes='require<profile-summary>,function(require<opt-remark-emit>,unroll)' 2>&1 | FileCheck %s
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; Make sure we use the profile information correctly to peel-off 3 iterations
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; from the loop, and update the branch weights for the peeled loop properly.
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; CHECK: Loop Unroll: F[basic]
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; CHECK: PEELING loop %for.body with iteration count 3!
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; CHECK-LABEL: @basic
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; CHECK: br i1 %{{.*}}, label %[[NEXT0:.*]], label %for.cond.for.end_crit_edge, !prof !16
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; CHECK: [[NEXT0]]:
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; CHECK: br i1 %{{.*}}, label %[[NEXT1:.*]], label %for.cond.for.end_crit_edge, !prof !17
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; CHECK: [[NEXT1]]:
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; CHECK: br i1 %{{.*}}, label %[[NEXT2:.*]], label %for.cond.for.end_crit_edge, !prof !18
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; CHECK: [[NEXT2]]:
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; CHECK: br i1 %{{.*}}, label %for.body, label %{{.*}}, !prof !19
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define i32 @basic(i32* %p, i32 %k, i1 %c) #0 !prof !15 {
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entry:
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%cmp3 = icmp slt i32 0, %k
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br i1 %cmp3, label %for.body.lr.ph, label %for.end
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for.body.lr.ph: ; preds = %entry
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br label %for.body
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for.body: ; preds = %for.body.lr.ph, %for.body
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%i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %continue ]
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%p.addr.04 = phi i32* [ %p, %for.body.lr.ph ], [ %incdec.ptr, %continue ]
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%incdec.ptr = getelementptr inbounds i32, i32* %p.addr.04, i32 1
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store i32 %i.05, i32* %p.addr.04, align 4
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%inc = add nsw i32 %i.05, 1
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%cmp = icmp slt i32 %inc, %k
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br i1 %c, label %continue, label %side_exit, !prof !17
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continue:
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br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge, !prof !16
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for.cond.for.end_crit_edge: ; preds = %for.body
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br label %for.end
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for.end: ; preds = %for.cond.for.end_crit_edge, %entry
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%res = phi i32 [ 0, %entry ], [ %inc, %for.cond.for.end_crit_edge ]
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ret i32 %res
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side_exit:
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%rval = call i32(...) @llvm.experimental.deoptimize.i32() [ "deopt"(i32 %inc) ]
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ret i32 %rval
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}
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declare i32 @llvm.experimental.deoptimize.i32(...)
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attributes #0 = { nounwind }
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attributes #1 = { nounwind optsize }
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!llvm.module.flags = !{!1}
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!1 = !{i32 1, !"ProfileSummary", !2}
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!2 = !{!3, !4, !5, !6, !7, !8, !9, !10}
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!3 = !{!"ProfileFormat", !"InstrProf"}
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!4 = !{!"TotalCount", i64 10}
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!5 = !{!"MaxCount", i64 3}
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!6 = !{!"MaxInternalCount", i64 1}
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!7 = !{!"MaxFunctionCount", i64 3}
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!8 = !{!"NumCounts", i64 2}
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!9 = !{!"NumFunctions", i64 2}
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!10 = !{!"DetailedSummary", !11}
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!11 = !{!12, !13, !14}
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!12 = !{i32 10000, i64 3, i32 2}
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!13 = !{i32 999000, i64 1, i32 10}
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!14 = !{i32 999999, i64 1, i32 10}
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!15 = !{!"function_entry_count", i64 1}
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!16 = !{!"branch_weights", i32 3001, i32 1001}
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!17 = !{!"branch_weights", i32 1, i32 0}
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;CHECK: !16 = !{!"branch_weights", i32 900, i32 101}
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;CHECK: !17 = !{!"branch_weights", i32 540, i32 360}
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;CHECK: !18 = !{!"branch_weights", i32 162, i32 378}
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;CHECK: !19 = !{!"branch_weights", i32 1399, i32 162}
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