1 files changed, 70 insertions, 0 deletions
diff --git a/llvm/test/Transforms/PhaseOrdering/scev-custom-dl.ll b/llvm/test/Transforms/PhaseOrdering/scev-custom-dl.ll
index ae822dd2e81..f67b121383c 100644
--- a/llvm/test/Transforms/PhaseOrdering/scev-custom-dl.ll
+++ b/llvm/test/Transforms/PhaseOrdering/scev-custom-dl.ll
@@ -65,3 +65,73 @@ for.inc:                                          ; preds = %for.body
 for.end:                                          ; preds = %for.cond
   ret void
 }
+
+@array = weak global [101 x i32] zeroinitializer, align 32		; <[100 x i32]*> [#uses=1]
+
+; CHECK: Loop %bb: backedge-taken count is 100
+
+define void @test_range_ref1a(i32 %x) {
+entry:
+	br label %bb
+
+bb:		; preds = %bb, %entry
+	%i.01.0 = phi i32 [ 100, %entry ], [ %tmp4, %bb ]		; <i32> [#uses=2]
+	%tmp1 = getelementptr [101 x i32], [101 x i32]* @array, i32 0, i32 %i.01.0		; <i32*> [#uses=1]
+	store i32 %x, i32* %tmp1
+	%tmp4 = add i32 %i.01.0, -1		; <i32> [#uses=2]
+	%tmp7 = icmp sgt i32 %tmp4, -1		; <i1> [#uses=1]
+	br i1 %tmp7, label %bb, label %return
+
+return:		; preds = %bb
+	ret void
+}
+
+define i32 @test_loop_idiom_recogize(i32 %x, i32 %y, i32* %lam, i32* %alp) nounwind {
+bb1.thread:
+	br label %bb1
+
+bb1:		; preds = %bb1, %bb1.thread
+	%indvar = phi i32 [ 0, %bb1.thread ], [ %indvar.next, %bb1 ]		; <i32> [#uses=4]
+	%i.0.reg2mem.0 = sub i32 255, %indvar		; <i32> [#uses=2]
+	%0 = getelementptr i32, i32* %alp, i32 %i.0.reg2mem.0		; <i32*> [#uses=1]
+	%1 = load i32, i32* %0, align 4		; <i32> [#uses=1]
+	%2 = getelementptr i32, i32* %lam, i32 %i.0.reg2mem.0		; <i32*> [#uses=1]
+	store i32 %1, i32* %2, align 4
+	%3 = sub i32 254, %indvar		; <i32> [#uses=1]
+	%4 = icmp slt i32 %3, 0		; <i1> [#uses=1]
+	%indvar.next = add i32 %indvar, 1		; <i32> [#uses=1]
+	br i1 %4, label %bb2, label %bb1
+
+bb2:		; preds = %bb1
+	%tmp10 = mul i32 %indvar, %x		; <i32> [#uses=1]
+	%z.0.reg2mem.0 = add i32 %tmp10, %y		; <i32> [#uses=1]
+	%5 = add i32 %z.0.reg2mem.0, %x		; <i32> [#uses=1]
+	ret i32 %5
+}
+
+declare void @use(i1)
+
+declare void @llvm.experimental.guard(i1, ...)
+
+; This tests getRangeRef acts as intended with different idx size.
+; CHECK: max backedge-taken count is 318
+define void @test_range_ref1(i8 %t) {
+ entry:
+  %t.ptr = inttoptr i8 %t to i8*
+  %p.42 = inttoptr i8 42 to i8*
+  %cmp1 = icmp slt i8* %t.ptr, %p.42
+  call void(i1, ...) @llvm.experimental.guard(i1 %cmp1) [ "deopt"() ]
+  br label %loop
+
+ loop:
+  %idx = phi i8* [ %t.ptr, %entry ], [ %snext, %loop ]
+  %snext = getelementptr inbounds i8, i8* %idx, i64 1
+  %c = icmp slt i8* %idx, %p.42
+  call void @use(i1 %c)
+  %be = icmp slt i8* %snext, %p.42
+  br i1 %be, label %loop, label %exit
+
+ exit:
+  ret void
+}
+