DependenceAnalysis: Print all dependency pairs when dumping. Update all testcases.

Part of a patch by Preston Briggs.

llvm-svn: 167827

1 files changed, 242 insertions, 115 deletions

diff --git a/llvm/test/Analysis/DependenceAnalysis/SymbolicRDIV.ll b/llvm/test/Analysis/DependenceAnalysis/SymbolicRDIV.ll
index 2a1b4e7e971..35c17b956f2 100644
--- a/llvm/test/Analysis/DependenceAnalysis/SymbolicRDIV.ll
+++ b/llvm/test/Analysis/DependenceAnalysis/SymbolicRDIV.ll
@@ -6,65 +6,99 @@ target triple = "x86_64-apple-macosx10.6.0"
 
 
 ;;  for (long int i = 0; i < n1; i++)
-;;    A[2*i + n1] = ...
+;;    A[2*i + n1] = i;
 ;;  for (long int j = 0; j < n2; j++)
-;;    ... = A[3*j + 3*n1];
+;;    *B++ = A[3*j + 3*n1];
 
 define void @symbolicrdiv0(i32* %A, i32* %B, i64 %n1, i64 %n2) nounwind uwtable ssp {
 entry:
   %cmp4 = icmp eq i64 %n1, 0
-  br i1 %cmp4, label %for.cond1.preheader, label %for.body
+  br i1 %cmp4, label %for.cond1.preheader, label %for.body.preheader
 
-for.cond1.preheader:                              ; preds = %for.body, %entry
+; CHECK: da analyze - consistent output [0|<]!
+; CHECK: da analyze - none!
+; CHECK: da analyze - confused!
+; CHECK: da analyze - consistent input [0|<]!
+; CHECK: da analyze - confused!
+; CHECK: da analyze - confused!
+
+for.body.preheader:                               ; preds = %entry
+  br label %for.body
+
+for.cond1.preheader.loopexit:                     ; preds = %for.body
+  br label %for.cond1.preheader
+
+for.cond1.preheader:                              ; preds = %for.cond1.preheader.loopexit, %entry
   %cmp21 = icmp eq i64 %n2, 0
-  br i1 %cmp21, label %for.end11, label %for.body4
+  br i1 %cmp21, label %for.end11, label %for.body4.preheader
 
-for.body:                                         ; preds = %for.body, %entry
-  %i.05 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+for.body4.preheader:                              ; preds = %for.cond1.preheader
+  br label %for.body4
+
+for.body:                                         ; preds = %for.body.preheader, %for.body
+  %i.05 = phi i64 [ %inc, %for.body ], [ 0, %for.body.preheader ]
   %conv = trunc i64 %i.05 to i32
   %mul = shl nsw i64 %i.05, 1
   %add = add i64 %mul, %n1
   %arrayidx = getelementptr inbounds i32* %A, i64 %add
   store i32 %conv, i32* %arrayidx, align 4
   %inc = add nsw i64 %i.05, 1
-  %cmp = icmp ult i64 %inc, %n1
-  br i1 %cmp, label %for.body, label %for.cond1.preheader
+  %exitcond = icmp ne i64 %inc, %n1
+  br i1 %exitcond, label %for.body, label %for.cond1.preheader.loopexit
 
-for.body4:                                        ; preds = %for.body4, %for.cond1.preheader
-  %j.03 = phi i64 [ %inc10, %for.body4 ], [ 0, %for.cond1.preheader ]
-  %B.addr.02 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.cond1.preheader ]
+for.body4:                                        ; preds = %for.body4.preheader, %for.body4
+  %j.03 = phi i64 [ %inc10, %for.body4 ], [ 0, %for.body4.preheader ]
+  %B.addr.02 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.body4.preheader ]
   %mul56 = add i64 %j.03, %n1
   %add7 = mul i64 %mul56, 3
   %arrayidx8 = getelementptr inbounds i32* %A, i64 %add7
   %0 = load i32* %arrayidx8, align 4
-; CHECK: da analyze - none!
   %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
   store i32 %0, i32* %B.addr.02, align 4
   %inc10 = add nsw i64 %j.03, 1
-  %cmp2 = icmp ult i64 %inc10, %n2
-  br i1 %cmp2, label %for.body4, label %for.end11
+  %exitcond7 = icmp ne i64 %inc10, %n2
+  br i1 %exitcond7, label %for.body4, label %for.end11.loopexit
+
+for.end11.loopexit:                               ; preds = %for.body4
+  br label %for.end11
 
-for.end11:                                        ; preds = %for.body4, %for.cond1.preheader
+for.end11:                                        ; preds = %for.end11.loopexit, %for.cond1.preheader
   ret void
 }
 
 
 ;;  for (long int i = 0; i < n1; i++)
-;;    A[2*i + 5*n2] = ...
+;;    A[2*i + 5*n2] = i;
 ;;  for (long int j = 0; j < n2; j++)
-;;    ... = A[3*j + 2*n2];
+;;    *B++ = A[3*j + 2*n2];
 
 define void @symbolicrdiv1(i32* %A, i32* %B, i64 %n1, i64 %n2) nounwind uwtable ssp {
 entry:
   %cmp4 = icmp eq i64 %n1, 0
-  br i1 %cmp4, label %for.cond2.preheader, label %for.body
+  br i1 %cmp4, label %for.cond2.preheader, label %for.body.preheader
 
-for.cond2.preheader:                              ; preds = %for.body, %entry
+; CHECK: da analyze - consistent output [0|<]!
+; CHECK: da analyze - none!
+; CHECK: da analyze - confused!
+; CHECK: da analyze - consistent input [0|<]!
+; CHECK: da analyze - confused!
+; CHECK: da analyze - confused!
+
+for.body.preheader:                               ; preds = %entry
+  br label %for.body
+
+for.cond2.preheader.loopexit:                     ; preds = %for.body
+  br label %for.cond2.preheader
+
+for.cond2.preheader:                              ; preds = %for.cond2.preheader.loopexit, %entry
   %cmp31 = icmp eq i64 %n2, 0
-  br i1 %cmp31, label %for.end12, label %for.body5
+  br i1 %cmp31, label %for.end12, label %for.body5.preheader
+
+for.body5.preheader:                              ; preds = %for.cond2.preheader
+  br label %for.body5
 
-for.body:                                         ; preds = %for.body, %entry
-  %i.05 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+for.body:                                         ; preds = %for.body.preheader, %for.body
+  %i.05 = phi i64 [ %inc, %for.body ], [ 0, %for.body.preheader ]
   %conv = trunc i64 %i.05 to i32
   %mul = shl nsw i64 %i.05, 1
   %mul1 = mul i64 %n2, 5
@@ -72,220 +106,307 @@ for.body:                                         ; preds = %for.body, %entry
   %arrayidx = getelementptr inbounds i32* %A, i64 %add
   store i32 %conv, i32* %arrayidx, align 4
   %inc = add nsw i64 %i.05, 1
-  %cmp = icmp ult i64 %inc, %n1
-  br i1 %cmp, label %for.body, label %for.cond2.preheader
+  %exitcond = icmp ne i64 %inc, %n1
+  br i1 %exitcond, label %for.body, label %for.cond2.preheader.loopexit
 
-for.body5:                                        ; preds = %for.body5, %for.cond2.preheader
-  %j.03 = phi i64 [ %inc11, %for.body5 ], [ 0, %for.cond2.preheader ]
-  %B.addr.02 = phi i32* [ %incdec.ptr, %for.body5 ], [ %B, %for.cond2.preheader ]
+for.body5:                                        ; preds = %for.body5.preheader, %for.body5
+  %j.03 = phi i64 [ %inc11, %for.body5 ], [ 0, %for.body5.preheader ]
+  %B.addr.02 = phi i32* [ %incdec.ptr, %for.body5 ], [ %B, %for.body5.preheader ]
   %mul6 = mul nsw i64 %j.03, 3
   %mul7 = shl i64 %n2, 1
   %add8 = add i64 %mul6, %mul7
   %arrayidx9 = getelementptr inbounds i32* %A, i64 %add8
   %0 = load i32* %arrayidx9, align 4
-; CHECK: da analyze - none!
   %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
   store i32 %0, i32* %B.addr.02, align 4
   %inc11 = add nsw i64 %j.03, 1
-  %cmp3 = icmp ult i64 %inc11, %n2
-  br i1 %cmp3, label %for.body5, label %for.end12
+  %exitcond6 = icmp ne i64 %inc11, %n2
+  br i1 %exitcond6, label %for.body5, label %for.end12.loopexit
 
-for.end12:                                        ; preds = %for.body5, %for.cond2.preheader
+for.end12.loopexit:                               ; preds = %for.body5
+  br label %for.end12
+
+for.end12:                                        ; preds = %for.end12.loopexit, %for.cond2.preheader
   ret void
 }
 
 
 ;;  for (long int i = 0; i < n1; i++)
-;;    A[2*i - n2] = ...
+;;    A[2*i - n2] = i;
 ;;  for (long int j = 0; j < n2; j++)
-;;    ... = A[-j + 2*n1];
+;;    *B++ = A[-j + 2*n1];
 
 define void @symbolicrdiv2(i32* %A, i32* %B, i64 %n1, i64 %n2) nounwind uwtable ssp {
 entry:
   %cmp4 = icmp eq i64 %n1, 0
-  br i1 %cmp4, label %for.cond1.preheader, label %for.body
+  br i1 %cmp4, label %for.cond1.preheader, label %for.body.preheader
+
+; CHECK: da analyze - consistent output [0|<]!
+; CHECK: da analyze - none!
+; CHECK: da analyze - confused!
+; CHECK: da analyze - consistent input [0|<]!
+; CHECK: da analyze - confused!
+; CHECK: da analyze - confused!
 
-for.cond1.preheader:                              ; preds = %for.body, %entry
+for.body.preheader:                               ; preds = %entry
+  br label %for.body
+
+for.cond1.preheader.loopexit:                     ; preds = %for.body
+  br label %for.cond1.preheader
+
+for.cond1.preheader:                              ; preds = %for.cond1.preheader.loopexit, %entry
   %cmp21 = icmp eq i64 %n2, 0
-  br i1 %cmp21, label %for.end10, label %for.body4
+  br i1 %cmp21, label %for.end10, label %for.body4.preheader
+
+for.body4.preheader:                              ; preds = %for.cond1.preheader
+  br label %for.body4
 
-for.body:                                         ; preds = %for.body, %entry
-  %i.05 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+for.body:                                         ; preds = %for.body.preheader, %for.body
+  %i.05 = phi i64 [ %inc, %for.body ], [ 0, %for.body.preheader ]
   %conv = trunc i64 %i.05 to i32
   %mul = shl nsw i64 %i.05, 1
   %sub = sub i64 %mul, %n2
   %arrayidx = getelementptr inbounds i32* %A, i64 %sub
   store i32 %conv, i32* %arrayidx, align 4
   %inc = add nsw i64 %i.05, 1
-  %cmp = icmp ult i64 %inc, %n1
-  br i1 %cmp, label %for.body, label %for.cond1.preheader
+  %exitcond = icmp ne i64 %inc, %n1
+  br i1 %exitcond, label %for.body, label %for.cond1.preheader.loopexit
 
-for.body4:                                        ; preds = %for.body4, %for.cond1.preheader
-  %j.03 = phi i64 [ %inc9, %for.body4 ], [ 0, %for.cond1.preheader ]
-  %B.addr.02 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.cond1.preheader ]
+for.body4:                                        ; preds = %for.body4.preheader, %for.body4
+  %j.03 = phi i64 [ %inc9, %for.body4 ], [ 0, %for.body4.preheader ]
+  %B.addr.02 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.body4.preheader ]
   %mul6 = shl i64 %n1, 1
   %add = sub i64 %mul6, %j.03
   %arrayidx7 = getelementptr inbounds i32* %A, i64 %add
   %0 = load i32* %arrayidx7, align 4
-; CHECK: da analyze - none!
   %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
   store i32 %0, i32* %B.addr.02, align 4
   %inc9 = add nsw i64 %j.03, 1
-  %cmp2 = icmp ult i64 %inc9, %n2
-  br i1 %cmp2, label %for.body4, label %for.end10
+  %exitcond6 = icmp ne i64 %inc9, %n2
+  br i1 %exitcond6, label %for.body4, label %for.end10.loopexit
+
+for.end10.loopexit:                               ; preds = %for.body4
+  br label %for.end10
 
-for.end10:                                        ; preds = %for.body4, %for.cond1.preheader
+for.end10:                                        ; preds = %for.end10.loopexit, %for.cond1.preheader
   ret void
 }
 
 
 ;;  for (long int i = 0; i < n1; i++)
-;;    A[-i + n2] = ...
+;;    A[-i + n2] = i;
 ;;  for (long int j = 0; j < n2; j++)
-;;    ... = A[j - n1];
+;;    *B++ = A[j - n1];
 
 define void @symbolicrdiv3(i32* %A, i32* %B, i64 %n1, i64 %n2) nounwind uwtable ssp {
 entry:
   %cmp4 = icmp eq i64 %n1, 0
-  br i1 %cmp4, label %for.cond1.preheader, label %for.body
+  br i1 %cmp4, label %for.cond1.preheader, label %for.body.preheader
+
+; CHECK: da analyze - consistent output [0|<]!
+; CHECK: da analyze - none!
+; CHECK: da analyze - confused!
+; CHECK: da analyze - consistent input [0|<]!
+; CHECK: da analyze - confused!
+; CHECK: da analyze - confused!
+
+for.body.preheader:                               ; preds = %entry
+  br label %for.body
+
+for.cond1.preheader.loopexit:                     ; preds = %for.body
+  br label %for.cond1.preheader
 
-for.cond1.preheader:                              ; preds = %for.body, %entry
+for.cond1.preheader:                              ; preds = %for.cond1.preheader.loopexit, %entry
   %cmp21 = icmp eq i64 %n2, 0
-  br i1 %cmp21, label %for.end9, label %for.body4
+  br i1 %cmp21, label %for.end9, label %for.body4.preheader
 
-for.body:                                         ; preds = %for.body, %entry
-  %i.05 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+for.body4.preheader:                              ; preds = %for.cond1.preheader
+  br label %for.body4
+
+for.body:                                         ; preds = %for.body.preheader, %for.body
+  %i.05 = phi i64 [ %inc, %for.body ], [ 0, %for.body.preheader ]
   %conv = trunc i64 %i.05 to i32
   %add = sub i64 %n2, %i.05
   %arrayidx = getelementptr inbounds i32* %A, i64 %add
   store i32 %conv, i32* %arrayidx, align 4
   %inc = add nsw i64 %i.05, 1
-  %cmp = icmp ult i64 %inc, %n1
-  br i1 %cmp, label %for.body, label %for.cond1.preheader
+  %exitcond = icmp ne i64 %inc, %n1
+  br i1 %exitcond, label %for.body, label %for.cond1.preheader.loopexit
 
-for.body4:                                        ; preds = %for.body4, %for.cond1.preheader
-  %j.03 = phi i64 [ %inc8, %for.body4 ], [ 0, %for.cond1.preheader ]
-  %B.addr.02 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.cond1.preheader ]
+for.body4:                                        ; preds = %for.body4.preheader, %for.body4
+  %j.03 = phi i64 [ %inc8, %for.body4 ], [ 0, %for.body4.preheader ]
+  %B.addr.02 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.body4.preheader ]
   %sub5 = sub i64 %j.03, %n1
   %arrayidx6 = getelementptr inbounds i32* %A, i64 %sub5
   %0 = load i32* %arrayidx6, align 4
-; CHECK: da analyze - none!
   %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
   store i32 %0, i32* %B.addr.02, align 4
   %inc8 = add nsw i64 %j.03, 1
-  %cmp2 = icmp ult i64 %inc8, %n2
-  br i1 %cmp2, label %for.body4, label %for.end9
+  %exitcond6 = icmp ne i64 %inc8, %n2
+  br i1 %exitcond6, label %for.body4, label %for.end9.loopexit
+
+for.end9.loopexit:                                ; preds = %for.body4
+  br label %for.end9
 
-for.end9:                                         ; preds = %for.body4, %for.cond1.preheader
+for.end9:                                         ; preds = %for.end9.loopexit, %for.cond1.preheader
   ret void
 }
 
 
 ;;  for (long int i = 0; i < n1; i++)
-;;    A[-i + 2*n1] = ...
+;;    A[-i + 2*n1] = i;
 ;;  for (long int j = 0; j < n2; j++)
-;;    ... = A[-j + n1];
+;;    *B++ = A[-j + n1];
 
 define void @symbolicrdiv4(i32* %A, i32* %B, i64 %n1, i64 %n2) nounwind uwtable ssp {
 entry:
   %cmp4 = icmp eq i64 %n1, 0
-  br i1 %cmp4, label %for.cond1.preheader, label %for.body
+  br i1 %cmp4, label %for.cond1.preheader, label %for.body.preheader
+
+; CHECK: da analyze - consistent output [0|<]!
+; CHECK: da analyze - none!
+; CHECK: da analyze - confused!
+; CHECK: da analyze - consistent input [0|<]!
+; CHECK: da analyze - confused!
+; CHECK: da analyze - confused!
+
+for.body.preheader:                               ; preds = %entry
+  br label %for.body
 
-for.cond1.preheader:                              ; preds = %for.body, %entry
+for.cond1.preheader.loopexit:                     ; preds = %for.body
+  br label %for.cond1.preheader
+
+for.cond1.preheader:                              ; preds = %for.cond1.preheader.loopexit, %entry
   %cmp21 = icmp eq i64 %n2, 0
-  br i1 %cmp21, label %for.end10, label %for.body4
+  br i1 %cmp21, label %for.end10, label %for.body4.preheader
+
+for.body4.preheader:                              ; preds = %for.cond1.preheader
+  br label %for.body4
 
-for.body:                                         ; preds = %for.body, %entry
-  %i.05 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+for.body:                                         ; preds = %for.body.preheader, %for.body
+  %i.05 = phi i64 [ %inc, %for.body ], [ 0, %for.body.preheader ]
   %conv = trunc i64 %i.05 to i32
   %mul = shl i64 %n1, 1
   %add = sub i64 %mul, %i.05
   %arrayidx = getelementptr inbounds i32* %A, i64 %add
   store i32 %conv, i32* %arrayidx, align 4
   %inc = add nsw i64 %i.05, 1
-  %cmp = icmp ult i64 %inc, %n1
-  br i1 %cmp, label %for.body, label %for.cond1.preheader
+  %exitcond = icmp ne i64 %inc, %n1
+  br i1 %exitcond, label %for.body, label %for.cond1.preheader.loopexit
 
-for.body4:                                        ; preds = %for.body4, %for.cond1.preheader
-  %j.03 = phi i64 [ %inc9, %for.body4 ], [ 0, %for.cond1.preheader ]
-  %B.addr.02 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.cond1.preheader ]
+for.body4:                                        ; preds = %for.body4.preheader, %for.body4
+  %j.03 = phi i64 [ %inc9, %for.body4 ], [ 0, %for.body4.preheader ]
+  %B.addr.02 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.body4.preheader ]
   %add6 = sub i64 %n1, %j.03
   %arrayidx7 = getelementptr inbounds i32* %A, i64 %add6
   %0 = load i32* %arrayidx7, align 4
-; CHECK: da analyze - none!
   %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
   store i32 %0, i32* %B.addr.02, align 4
   %inc9 = add nsw i64 %j.03, 1
-  %cmp2 = icmp ult i64 %inc9, %n2
-  br i1 %cmp2, label %for.body4, label %for.end10
+  %exitcond6 = icmp ne i64 %inc9, %n2
+  br i1 %exitcond6, label %for.body4, label %for.end10.loopexit
 
-for.end10:                                        ; preds = %for.body4, %for.cond1.preheader
+for.end10.loopexit:                               ; preds = %for.body4
+  br label %for.end10
+
+for.end10:                                        ; preds = %for.end10.loopexit, %for.cond1.preheader
   ret void
 }
 
 
 ;;  for (long int i = 0; i < n1; i++)
-;;    A[-i + n2] = ...
+;;    A[-i + n2] = i;
 ;;  for (long int j = 0; j < n2; j++)
-;;    ... = A[-j + 2*n2];
+;;    *B++ = A[-j + 2*n2];
 
 define void @symbolicrdiv5(i32* %A, i32* %B, i64 %n1, i64 %n2) nounwind uwtable ssp {
 entry:
   %cmp4 = icmp eq i64 %n1, 0
-  br i1 %cmp4, label %for.cond1.preheader, label %for.body
+  br i1 %cmp4, label %for.cond1.preheader, label %for.body.preheader
+
+; CHECK: da analyze - consistent output [0|<]!
+; CHECK: da analyze - none!
+; CHECK: da analyze - confused!
+; CHECK: da analyze - consistent input [0|<]!
+; CHECK: da analyze - confused!
+; CHECK: da analyze - confused!
 
-for.cond1.preheader:                              ; preds = %for.body, %entry
+for.body.preheader:                               ; preds = %entry
+  br label %for.body
+
+for.cond1.preheader.loopexit:                     ; preds = %for.body
+  br label %for.cond1.preheader
+
+for.cond1.preheader:                              ; preds = %for.cond1.preheader.loopexit, %entry
   %cmp21 = icmp eq i64 %n2, 0
-  br i1 %cmp21, label %for.end10, label %for.body4
+  br i1 %cmp21, label %for.end10, label %for.body4.preheader
+
+for.body4.preheader:                              ; preds = %for.cond1.preheader
+  br label %for.body4
 
-for.body:                                         ; preds = %for.body, %entry
-  %i.05 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+for.body:                                         ; preds = %for.body.preheader, %for.body
+  %i.05 = phi i64 [ %inc, %for.body ], [ 0, %for.body.preheader ]
   %conv = trunc i64 %i.05 to i32
   %add = sub i64 %n2, %i.05
   %arrayidx = getelementptr inbounds i32* %A, i64 %add
   store i32 %conv, i32* %arrayidx, align 4
   %inc = add nsw i64 %i.05, 1
-  %cmp = icmp ult i64 %inc, %n1
-  br i1 %cmp, label %for.body, label %for.cond1.preheader
+  %exitcond = icmp ne i64 %inc, %n1
+  br i1 %exitcond, label %for.body, label %for.cond1.preheader.loopexit
 
-for.body4:                                        ; preds = %for.body4, %for.cond1.preheader
-  %j.03 = phi i64 [ %inc9, %for.body4 ], [ 0, %for.cond1.preheader ]
-  %B.addr.02 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.cond1.preheader ]
+for.body4:                                        ; preds = %for.body4.preheader, %for.body4
+  %j.03 = phi i64 [ %inc9, %for.body4 ], [ 0, %for.body4.preheader ]
+  %B.addr.02 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.body4.preheader ]
   %mul = shl i64 %n2, 1
   %add6 = sub i64 %mul, %j.03
   %arrayidx7 = getelementptr inbounds i32* %A, i64 %add6
   %0 = load i32* %arrayidx7, align 4
-; CHECK: da analyze - none!
   %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
   store i32 %0, i32* %B.addr.02, align 4
   %inc9 = add nsw i64 %j.03, 1
-  %cmp2 = icmp ult i64 %inc9, %n2
-  br i1 %cmp2, label %for.body4, label %for.end10
+  %exitcond6 = icmp ne i64 %inc9, %n2
+  br i1 %exitcond6, label %for.body4, label %for.end10.loopexit
+
+for.end10.loopexit:                               ; preds = %for.body4
+  br label %for.end10
 
-for.end10:                                        ; preds = %for.body4, %for.cond1.preheader
+for.end10:                                        ; preds = %for.end10.loopexit, %for.cond1.preheader
   ret void
 }
 
 
 ;;  for (long int i = 0; i < n1; i++)
-;;    for (long int j = 0; j < n2; j++)
-;;      A[j -i + n2] = ...
-;;      ... = A[2*n2];
+;;    for (long int j = 0; j < n2; j++) {
+;;      A[j -i + n2] = i;
+;;      *B++ = A[2*n2];
 
 define void @symbolicrdiv6(i32* %A, i32* %B, i64 %n1, i64 %n2) nounwind uwtable ssp {
 entry:
   %cmp4 = icmp eq i64 %n1, 0
-  br i1 %cmp4, label %for.end7, label %for.cond1.preheader
+  br i1 %cmp4, label %for.end7, label %for.cond1.preheader.preheader
+
+; CHECK: da analyze - output [* *|<]!
+; CHECK: da analyze - none!
+; CHECK: da analyze - confused!
+; CHECK: da analyze - consistent input [S S|<]!
+; CHECK: da analyze - confused!
+; CHECK: da analyze - confused!
+
+for.cond1.preheader.preheader:                    ; preds = %entry
+  br label %for.cond1.preheader
 
-for.cond1.preheader:                              ; preds = %for.inc5, %entry
-  %B.addr.06 = phi i32* [ %B.addr.1.lcssa, %for.inc5 ], [ %B, %entry ]
-  %i.05 = phi i64 [ %inc6, %for.inc5 ], [ 0, %entry ]
+for.cond1.preheader:                              ; preds = %for.cond1.preheader.preheader, %for.inc5
+  %B.addr.06 = phi i32* [ %B.addr.1.lcssa, %for.inc5 ], [ %B, %for.cond1.preheader.preheader ]
+  %i.05 = phi i64 [ %inc6, %for.inc5 ], [ 0, %for.cond1.preheader.preheader ]
   %cmp21 = icmp eq i64 %n2, 0
-  br i1 %cmp21, label %for.inc5, label %for.body3
+  br i1 %cmp21, label %for.inc5, label %for.body3.preheader
+
+for.body3.preheader:                              ; preds = %for.cond1.preheader
+  br label %for.body3
 
-for.body3:                                        ; preds = %for.body3, %for.cond1.preheader
-  %j.03 = phi i64 [ %inc, %for.body3 ], [ 0, %for.cond1.preheader ]
-  %B.addr.12 = phi i32* [ %incdec.ptr, %for.body3 ], [ %B.addr.06, %for.cond1.preheader ]
+for.body3:                                        ; preds = %for.body3.preheader, %for.body3
+  %j.03 = phi i64 [ %inc, %for.body3 ], [ 0, %for.body3.preheader ]
+  %B.addr.12 = phi i32* [ %incdec.ptr, %for.body3 ], [ %B.addr.06, %for.body3.preheader ]
   %conv = trunc i64 %i.05 to i32
   %sub = sub nsw i64 %j.03, %i.05
   %add = add i64 %sub, %n2
@@ -294,19 +415,25 @@ for.body3:                                        ; preds = %for.body3, %for.con
   %mul = shl i64 %n2, 1
   %arrayidx4 = getelementptr inbounds i32* %A, i64 %mul
   %0 = load i32* %arrayidx4, align 4
-; CHECK: da analyze - none!
   %incdec.ptr = getelementptr inbounds i32* %B.addr.12, i64 1
   store i32 %0, i32* %B.addr.12, align 4
   %inc = add nsw i64 %j.03, 1
-  %cmp2 = icmp ult i64 %inc, %n2
-  br i1 %cmp2, label %for.body3, label %for.inc5
+  %exitcond = icmp ne i64 %inc, %n2
+  br i1 %exitcond, label %for.body3, label %for.inc5.loopexit
+
+for.inc5.loopexit:                                ; preds = %for.body3
+  %scevgep = getelementptr i32* %B.addr.06, i64 %n2
+  br label %for.inc5
 
-for.inc5:                                         ; preds = %for.body3, %for.cond1.preheader
-  %B.addr.1.lcssa = phi i32* [ %B.addr.06, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+for.inc5:                                         ; preds = %for.inc5.loopexit, %for.cond1.preheader
+  %B.addr.1.lcssa = phi i32* [ %B.addr.06, %for.cond1.preheader ], [ %scevgep, %for.inc5.loopexit ]
   %inc6 = add nsw i64 %i.05, 1
-  %cmp = icmp ult i64 %inc6, %n1
-  br i1 %cmp, label %for.cond1.preheader, label %for.end7
+  %exitcond7 = icmp ne i64 %inc6, %n1
+  br i1 %exitcond7, label %for.cond1.preheader, label %for.end7.loopexit
+
+for.end7.loopexit:                                ; preds = %for.inc5
+  br label %for.end7
 
-for.end7:                                         ; preds = %for.inc5, %entry
+for.end7:                                         ; preds = %for.end7.loopexit, %entry
   ret void
 }