1 files changed, 73 insertions, 0 deletions
diff --git a/llvm/test/Analysis/ScalarEvolution/scev-dispositions.ll b/llvm/test/Analysis/ScalarEvolution/scev-dispositions.ll
new file mode 100644
index 00000000000..8f5143930bb
--- /dev/null
+++ b/llvm/test/Analysis/ScalarEvolution/scev-dispositions.ll
@@ -0,0 +1,73 @@
+; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s
+
+define void @single_loop(i32* %buf, i32 %start) {
+; CHECK-LABEL: Classifying expressions for: @single_loop
+ entry:
+  %val = add i32 %start, 400
+  br label %loop
+
+ loop:
+  %counter = phi i32 [ 0, %entry ], [ %counter.inc, %loop ]
+  %idx = phi i32 [ %start, %entry ], [ %idx.inc, %loop ]
+
+; CHECK:  %counter = phi i32 [ 0, %entry ], [ %counter.inc, %loop ]
+; CHECK-NEXT:  -->  {{.*}} LoopDispositions: [ Computable ]
+; CHECK:  %idx = phi i32 [ %start, %entry ], [ %idx.inc, %loop ]
+; CHECK-NEXT:  -->  {{.*}} LoopDispositions: [ Computable ]
+; CHECK:  %val2 = add i32 %start, 400
+; CHECK-NEXT:  -->  {{.*}} LoopDispositions: [ Invariant ]
+; CHECK:  %idx.inc = add nsw i32 %idx, 1
+; CHECK-NEXT:  -->  {{.*}} LoopDispositions: [ Computable ]
+; CHECK:  %val3 = load volatile i32, i32* %buf
+; CHECK-NEXT:  -->  {{.*}} LoopDispositions: [ Variant ]
+
+  %val2 = add i32 %start, 400
+  %idx.inc = add nsw i32 %idx, 1
+  %idx.inc.sext = sext i32 %idx.inc to i64
+  %condition = icmp eq i32 %counter, 1
+  %counter.inc = add i32 %counter, 1
+  %val3 = load volatile i32, i32* %buf
+  br i1 %condition, label %exit, label %loop
+
+ exit:
+  ret void
+}
+
+
+define void @nested_loop(double* %p, i64 %m) {
+; CHECK-LABEL: Classifying expressions for: @nested_loop
+
+; CHECK:  %j = phi i64 [ 0, %entry ], [ %j.next, %outer.latch ]
+; CHECK-NEXT:  -->  {{.*}} LoopDispositions: [ Computable ]
+; CHECK:  %i = phi i64 [ 0, %outer.loop ], [ %i.next, %bb ]
+; CHECK-NEXT:  -->  {{.*}} LoopDispositions: [ Computable, Variant ]
+; CHECK:  %j.add = add i64 %j, 100
+; CHECK-NEXT:  -->  {{.*}} LoopDispositions: [ Invariant, Computable ]
+; CHECK:  %i.next = add i64 %i, 1
+; CHECK-NEXT:  -->  {{.*}} LoopDispositions: [ Computable, Variant ]
+; CHECK:  %j.next = add i64 %j, 91
+; CHECK-NEXT:  -->  {{.*}} LoopDispositions: [ Computable ]
+
+entry:
+  %k = icmp sgt i64 %m, 0
+  br i1 %k, label %outer.loop, label %return
+
+outer.loop:
+  %j = phi i64 [ 0, %entry ], [ %j.next, %outer.latch ]
+  br label %bb
+
+bb:
+  %i = phi i64 [ 0, %outer.loop ], [ %i.next, %bb ]
+  %j.add = add i64 %j, 100
+  %i.next = add i64 %i, 1
+  %exitcond = icmp eq i64 %i.next, 91
+  br i1 %exitcond, label %outer.latch, label %bb
+
+outer.latch:
+  %j.next = add i64 %j, 91
+  %h = icmp eq i64 %j.next, %m
+  br i1 %h, label %return, label %outer.loop
+
+return:
+  ret void
+}