; RUN: opt -S -passes='loop-versioning-licm' -licm-versioning-invariant-threshold=0 %s | FileCheck %s
; Make sure the convergent attribute is respected, and no condition is
; introduced
; CHECK-LABEL: @test_convergent(
; CHECK: call void @llvm.convergent()
; CHECK-NOT: call void @llvm.convergent()
define i32 @test_convergent(ptr nocapture %var1, ptr nocapture readnone %var2, ptr nocapture %var3, i32 %itr) #1 {
entry:
%cmp14 = icmp eq i32 %itr, 0
br i1 %cmp14, label %for.end13, label %for.cond1.preheader
for.cond1.preheader: ; preds = %entry, %for.inc11
%j.016 = phi i32 [ %j.1.lcssa, %for.inc11 ], [ 0, %entry ]
%i.015 = phi i32 [ %inc12, %for.inc11 ], [ 0, %entry ]
%cmp212 = icmp ult i32 %j.016, %itr
br i1 %cmp212, label %for.body3.lr.ph, label %for.inc11
for.body3.lr.ph: ; preds = %for.cond1.preheader
%add = add i32 %i.015, %itr
%idxprom6 = zext i32 %i.015 to i64
%arrayidx7 = getelementptr inbounds i32, ptr %var3, i64 %idxprom6
br label %for.body3
for.body3: ; preds = %for.body3, %for.body3.lr.ph
%j.113 = phi i32 [ %j.016, %for.body3.lr.ph ], [ %inc, %for.body3 ]
%idxprom = zext i32 %j.113 to i64
%arrayidx = getelementptr inbounds i32, ptr %var1, i64 %idxprom
store i32 %add, ptr %arrayidx, align 4
%load.arrayidx7 = load i32, ptr %arrayidx7, align 4
call void @llvm.convergent()
%add8 = add nsw i32 %load.arrayidx7, %add
store i32 %add8, ptr %arrayidx7, align 4
%inc = add nuw i32 %j.113, 1
%cmp2 = icmp ult i32 %inc, %itr
br i1 %cmp2, label %for.body3, label %for.inc11
for.inc11: ; preds = %for.body3, %for.cond1.preheader
%j.1.lcssa = phi i32 [ %j.016, %for.cond1.preheader ], [ %itr, %for.body3 ]
%inc12 = add nuw i32 %i.015, 1
%cmp = icmp ult i32 %inc12, %itr
br i1 %cmp, label %for.cond1.preheader, label %for.end13
for.end13: ; preds = %for.inc11, %entry
ret i32 0
}
; CHECK-LABEL: @test_noduplicate(
; CHECK: call void @llvm.noduplicate()
; CHECK-NOT: call void @llvm.noduplicate()
define i32 @test_noduplicate(ptr nocapture %var1, ptr nocapture readnone %var2, ptr nocapture %var3, i32 %itr) #2 {
entry:
%cmp14 = icmp eq i32 %itr, 0
br i1 %cmp14, label %for.end13, label %for.cond1.preheader
for.cond1.preheader: ; preds = %entry, %for.inc11
%j.016 = phi i32 [ %j.1.lcssa, %for.inc11 ], [ 0, %entry ]
%i.015 = phi i32 [ %inc12, %for.inc11 ], [ 0, %entry ]
%cmp212 = icmp ult i32 %j.016, %itr
br i1 %cmp212, label %for.body3.lr.ph, label %for.inc11
for.body3.lr.ph: ; preds = %for.cond1.preheader
%add = add i32 %i.015, %itr
%idxprom6 = zext i32 %i.015 to i64
%arrayidx7 = getelementptr inbounds i32, ptr %var3, i64 %idxprom6
br label %for.body3
for.body3: ; preds = %for.body3, %for.body3.lr.ph
%j.113 = phi i32 [ %j.016, %for.body3.lr.ph ], [ %inc, %for.body3 ]
%idxprom = zext i32 %j.113 to i64
%arrayidx = getelementptr inbounds i32, ptr %var1, i64 %idxprom
store i32 %add, ptr %arrayidx, align 4
%load.arrayidx7 = load i32, ptr %arrayidx7, align 4
call void @llvm.noduplicate()
%add8 = add nsw i32 %load.arrayidx7, %add
store i32 %add8, ptr %arrayidx7, align 4
%inc = add nuw i32 %j.113, 1
%cmp2 = icmp ult i32 %inc, %itr
br i1 %cmp2, label %for.body3, label %for.inc11
for.inc11: ; preds = %for.body3, %for.cond1.preheader
%j.1.lcssa = phi i32 [ %j.016, %for.cond1.preheader ], [ %itr, %for.body3 ]
%inc12 = add nuw i32 %i.015, 1
%cmp = icmp ult i32 %inc12, %itr
br i1 %cmp, label %for.cond1.preheader, label %for.end13
for.end13: ; preds = %for.inc11, %entry
ret i32 0
}
declare void @llvm.convergent() #1
declare void @llvm.noduplicate() #2
attributes #0 = { norecurse nounwind }
attributes #1 = { norecurse nounwind readnone convergent }
attributes #2 = { norecurse nounwind readnone noduplicate }
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