[DA] Fix direction vectors for weakZeroSrcSIV

Both weakZeroSrcSIV and weakZeroDstSIV are currently giving the same
direction vectors. Fix weakZeroSrcSIVtest by flipping the directions
it gives.

Differential Revision: https://reviews.llvm.org/D46678

llvm-svn: 333658

1 files changed, 29 insertions, 0 deletions

diff --git a/llvm/test/Analysis/DependenceAnalysis/WeakZeroDstSIV.ll b/llvm/test/Analysis/DependenceAnalysis/WeakZeroDstSIV.ll
index 8adb7f7b32d..128eb47018a 100644
--- a/llvm/test/Analysis/DependenceAnalysis/WeakZeroDstSIV.ll
+++ b/llvm/test/Analysis/DependenceAnalysis/WeakZeroDstSIV.ll
@@ -5,6 +5,35 @@ target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f3
 target triple = "x86_64-apple-macosx10.6.0"
 
 
+;;  for (int i = 0; i < N; i++) {
+;;    A[i] = 1;
+;;    A[0] = 2;
+
+define void @dstzero(i32* nocapture %A, i32 %N) {
+entry:
+  %cmp6 = icmp sgt i32 %N, 0
+  br i1 %cmp6, label %for.body, label %for.cond.cleanup
+
+; CHECK: da analyze - none!
+; CHECK: da analyze - output [p<=|<]!
+; CHECK: da analyze - consistent output [S]!
+
+for.body:                                         ; preds = %entry, %for.body
+  %i.07 = phi i32 [ %add, %for.body ], [ 0, %entry ]
+  %arrayidx = getelementptr inbounds i32, i32* %A, i32 %i.07
+  store i32 0, i32* %arrayidx, align 4
+  store i32 1, i32* %A, align 4
+  %add = add nuw nsw i32 %i.07, 1
+  %exitcond = icmp eq i32 %add, %N
+  br i1 %exitcond, label %for.cond.cleanup, label %for.body
+
+for.cond.cleanup:                                 ; preds = %for.body, %entry
+  ret void
+}
+
+
+
+
 ;;  for (long unsigned i = 0; i < 30; i++) {
 ;;    A[2*i + 10] = i;
 ;;    *B++ = A[10];