211 lines
5.8 KiB
LLVM
211 lines
5.8 KiB
LLVM
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; RUN: opt < %s -S -loop-unroll -unroll-count=4 | FileCheck -check-prefix=CHECK_COUNT4 %s
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; RUN: opt < %s -S -loop-unroll | FileCheck -check-prefix=CHECK_NOCOUNT %s
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; RUN: opt < %s -S -passes='require<profile-summary>,function(loop-unroll)' -pgso | FileCheck -check-prefix=PGSO %s
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; RUN: opt < %s -S -passes='require<profile-summary>,function(loop-unroll)' -pgso=false | FileCheck -check-prefix=NPGSO %s
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;///////////////////// TEST 1 //////////////////////////////
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; This test shows that the loop is unrolled according to the specified
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; unroll factor.
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define void @Test1() nounwind {
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entry:
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br label %loop
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loop:
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%iv = phi i32 [ 0, %entry ], [ %inc, %loop ]
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%inc = add i32 %iv, 1
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%exitcnd = icmp uge i32 %inc, 1024
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br i1 %exitcnd, label %exit, label %loop
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exit:
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ret void
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}
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; CHECK_COUNT4-LABEL: @Test1
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; CHECK_COUNT4: phi
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; CHECK_COUNT4-NEXT: add
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; CHECK_COUNT4-NEXT: add
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; CHECK_COUNT4-NEXT: add
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; CHECK_COUNT4-NEXT: add
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; CHECK_COUNT4-NEXT: icmp
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;///////////////////// TEST 2 //////////////////////////////
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; This test shows that with optnone attribute, the loop is not unrolled
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; even if an unroll factor was specified.
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define void @Test2() nounwind optnone noinline {
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entry:
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br label %loop
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loop:
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%iv = phi i32 [ 0, %entry ], [ %inc, %loop ]
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%inc = add i32 %iv, 1
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%exitcnd = icmp uge i32 %inc, 1024
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br i1 %exitcnd, label %exit, label %loop
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exit:
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ret void
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}
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; CHECK_COUNT4-LABEL: @Test2
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; CHECK_COUNT4: phi
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; CHECK_COUNT4-NEXT: add
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; CHECK_COUNT4-NEXT: icmp
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;///////////////////// TEST 3 //////////////////////////////
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; This test shows that this loop is fully unrolled by default.
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@tab = common global [24 x i32] zeroinitializer, align 4
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define i32 @Test3() {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%i.05 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%arrayidx = getelementptr inbounds [24 x i32], [24 x i32]* @tab, i32 0, i32 %i.05
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store i32 %i.05, i32* %arrayidx, align 4
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%inc = add nuw nsw i32 %i.05, 1
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%exitcond = icmp eq i32 %inc, 24
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret i32 42
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}
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; CHECK_NOCOUNT-LABEL: @Test3
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; CHECK_NOCOUNT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: store
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; CHECK_NOCOUNT-NEXT: ret
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;///////////////////// TEST 4 //////////////////////////////
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; This test shows that with optsize attribute, this loop is not unrolled.
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define i32 @Test4() optsize {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%i.05 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%arrayidx = getelementptr inbounds [24 x i32], [24 x i32]* @tab, i32 0, i32 %i.05
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store i32 %i.05, i32* %arrayidx, align 4
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%inc = add nuw nsw i32 %i.05, 1
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%exitcond = icmp eq i32 %inc, 24
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret i32 42
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}
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; CHECK_NOCOUNT-LABEL: @Test4
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; CHECK_NOCOUNT: phi
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; CHECK_NOCOUNT: icmp
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;///////////////////// TEST 5 //////////////////////////////
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; This test shows that with PGO, this loop is cold and not unrolled.
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define i32 @Test5() !prof !14 {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%i.05 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%arrayidx = getelementptr inbounds [24 x i32], [24 x i32]* @tab, i32 0, i32 %i.05
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store i32 %i.05, i32* %arrayidx, align 4
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%inc = add nuw nsw i32 %i.05, 1
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%exitcond = icmp eq i32 %inc, 24
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret i32 42
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}
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; PGSO-LABEL: @Test5
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; PGSO: phi
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; PGSO: icmp
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; NPGSO-LABEL: @Test5
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; NPGSO-NOT: phi
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; NPGSO-NOT: icmp
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;///////////////////// TEST 6 //////////////////////////////
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; This test tests that unroll hints take precedence over PGSO and that this loop
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; gets unrolled even though it's cold.
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define i32 @Test6() !prof !14 {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%i.05 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%arrayidx = getelementptr inbounds [24 x i32], [24 x i32]* @tab, i32 0, i32 %i.05
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store i32 %i.05, i32* %arrayidx, align 4
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%inc = add nuw nsw i32 %i.05, 1
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%exitcond = icmp eq i32 %inc, 24
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br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !15
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for.end: ; preds = %for.body
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ret i32 42
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}
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; PGSO-LABEL: @Test6
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; PGSO: store
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; PGSO: store
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; PGSO: store
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; PGSO: store
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; NPGSO-LABEL: @Test6
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; NPGSO: store
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; NPGSO: store
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; NPGSO: store
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; NPGSO: store
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!llvm.module.flags = !{!0}
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!0 = !{i32 1, !"ProfileSummary", !1}
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!1 = !{!2, !3, !4, !5, !6, !7, !8, !9}
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!2 = !{!"ProfileFormat", !"InstrProf"}
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!3 = !{!"TotalCount", i64 10000}
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!4 = !{!"MaxCount", i64 10}
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!5 = !{!"MaxInternalCount", i64 1}
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!6 = !{!"MaxFunctionCount", i64 1000}
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!7 = !{!"NumCounts", i64 3}
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!8 = !{!"NumFunctions", i64 3}
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!9 = !{!"DetailedSummary", !10}
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!10 = !{!11, !12, !13}
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!11 = !{i32 10000, i64 100, i32 1}
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!12 = !{i32 999000, i64 100, i32 1}
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!13 = !{i32 999999, i64 1, i32 2}
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!14 = !{!"function_entry_count", i64 0}
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!15 = !{!15, !16}
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!16 = !{!"llvm.loop.unroll.count", i32 4}
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