LoopVersioningLICM: Respect convergent and noduplicate

llvm-svn: 362031

1 files changed, 97 insertions, 0 deletions

diff --git a/llvm/test/Transforms/LoopVersioningLICM/convergent.ll b/llvm/test/Transforms/LoopVersioningLICM/convergent.ll
new file mode 100644
index 00000000000..55209be4f9c
--- /dev/null
+++ b/llvm/test/Transforms/LoopVersioningLICM/convergent.ll
@@ -0,0 +1,97 @@
+; RUN: opt -S -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(i32* nocapture %var1, i32* nocapture readnone %var2, i32* 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, i32* %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, i32* %var1, i64 %idxprom
+  store i32 %add, i32* %arrayidx, align 4
+  %load.arrayidx7 = load i32, i32* %arrayidx7, align 4
+  call void @llvm.convergent()
+  %add8 = add nsw i32 %load.arrayidx7, %add
+  store i32 %add8, i32* %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(i32* nocapture %var1, i32* nocapture readnone %var2, i32* 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, i32* %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, i32* %var1, i64 %idxprom
+  store i32 %add, i32* %arrayidx, align 4
+  %load.arrayidx7 = load i32, i32* %arrayidx7, align 4
+  call void @llvm.noduplicate()
+  %add8 = add nsw i32 %load.arrayidx7, %add
+  store i32 %add8, i32* %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 }