1 files changed, 70 insertions, 0 deletions
diff --git a/polly/test/ScopInfo/partially_invariant_load_2.ll b/polly/test/ScopInfo/partially_invariant_load_2.ll
new file mode 100644
index 00000000000..59e377e71e9
--- /dev/null
+++ b/polly/test/ScopInfo/partially_invariant_load_2.ll
@@ -0,0 +1,70 @@
+; RUN: opt %loadPolly -polly-scops -analyze < %s | FileCheck %s
+;
+; Check that we do not try to preload *I and assume p != 42.
+;
+; CHECK:      Invariant Accesses: {
+; CHECK-NEXT:   ReadAccess := [Reduction Type: NONE] [Scalar: 0]
+; CHECK-NEXT:   [N, p, tmp1, q] -> { Stmt_if_then[i0] -> MemRef_I[0] };
+; CHECK-NEXT:   Execution Context: [N, p, tmp1, q] -> {  : 1 = 0 }
+; CHECK-NEXT: }
+;
+; CHECK:      Invalid Context:
+; CHECK-NEXT: [N, p, tmp1, q] -> {  : p = 42 and N > 0 }
+;
+;    void f(int *A, int *I, int N, int p, int q) {
+;      for (int i = 0; i < N; i++) {
+;        if (p == 42) {
+;          *I = 0;
+;          if (*I == q)
+;            A[i] *= 2;
+;        }
+;        A[i]++;
+;      }
+;    }
+;
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+
+define void @f(i32* %A, i32* %I, i32 %N, i32 %p, i32 %q) {
+entry:
+  %tmp = sext i32 %N to i64
+  br label %for.cond
+
+for.cond:                                         ; preds = %for.inc, %entry
+  %indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
+  %cmp = icmp slt i64 %indvars.iv, %tmp
+  br i1 %cmp, label %for.body, label %for.end
+
+for.body:                                         ; preds = %for.cond
+  %cmp1 = icmp eq i32 %p, 42
+  br i1 %cmp1, label %if.then, label %if.end4
+
+if.then:                                          ; preds = %for.body
+  store i32 0, i32* %I, align 4
+  %tmp1 = load i32, i32* %I, align 4
+  %cmp2 = icmp eq i32 %tmp1, %q
+  br i1 %cmp2, label %if.then3, label %if.end
+
+if.then3:                                         ; preds = %if.then
+  %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
+  %tmp2 = load i32, i32* %arrayidx, align 4
+  %mul = shl nsw i32 %tmp2, 1
+  store i32 %mul, i32* %arrayidx, align 4
+  br label %if.end
+
+if.end:                                           ; preds = %if.then3, %if.then
+  br label %if.end4
+
+if.end4:                                          ; preds = %if.end, %for.body
+  %arrayidx6 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
+  %tmp3 = load i32, i32* %arrayidx6, align 4
+  %inc = add nsw i32 %tmp3, 1
+  store i32 %inc, i32* %arrayidx6, align 4
+  br label %for.inc
+
+for.inc:                                          ; preds = %if.end4
+  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
+  br label %for.cond
+
+for.end:                                          ; preds = %for.cond
+  ret void
+}