1 files changed, 86 insertions, 0 deletions
diff --git a/llvm/test/Transforms/LoopFusion/inner_loops.ll b/llvm/test/Transforms/LoopFusion/inner_loops.ll
new file mode 100644
index 00000000000..2b14ec98fac
--- /dev/null
+++ b/llvm/test/Transforms/LoopFusion/inner_loops.ll
@@ -0,0 +1,86 @@
+; RUN: opt -S -loop-fusion < %s 2>&1 | FileCheck %s
+
+@A = common global [1024 x [1024 x i32]] zeroinitializer, align 16
+@B = common global [1024 x [1024 x i32]] zeroinitializer, align 16
+
+; CHECK: void @dep_free
+; CHECK-NEXT: bb:
+; CHECK-NEXT: br label %[[LOOP1HEADER:bb[0-9]*]]
+; CHECK: [[LOOP1HEADER]]
+; CHECK: br i1 %{{.*}}, label %[[LOOP1BODY:bb[0-9]*]], label %[[LOOP2PREHEADER:bb[0-9]+]]
+; CHECK: [[LOOP1BODY]]
+; CHECK: br label %[[LOOP1LATCH:bb[0-9]*]]
+; CHECK: [[LOOP1LATCH]]
+; CHECK: br label %[[LOOP2PREHEADER:bb[0-9]+]]
+; CHECK: [[LOOP2PREHEADER]]
+; CHECK: br i1 %{{.*}}, label %[[LOOP2BODY:bb[0-9]*]], label %[[LOOP2EXIT:bb[0-9]*]]
+; CHECK: [[LOOP2BODY]]
+; CHECK: br label %[[LOOP2LATCH:bb[0-9]+]]
+; CHECK: [[LOOP2LATCH]]
+; CHECK: br label %[[LOOP1HEADER]]
+; CHECK: ret void
+
+define void @dep_free() {
+bb:
+  br label %bb9
+
+bb9:                                              ; preds = %bb35, %bb
+  %indvars.iv6 = phi i64 [ %indvars.iv.next7, %bb35 ], [ 0, %bb ]
+  %.0 = phi i32 [ 0, %bb ], [ %tmp36, %bb35 ]
+  %exitcond8 = icmp ne i64 %indvars.iv6, 100
+  br i1 %exitcond8, label %bb11, label %bb10
+
+bb10:                                             ; preds = %bb9
+  br label %bb37
+
+bb11:                                             ; preds = %bb9
+  br label %bb12
+
+bb12:                                             ; preds = %bb21, %bb11
+  %indvars.iv = phi i64 [ %indvars.iv.next, %bb21 ], [ 0, %bb11 ]
+  %exitcond = icmp ne i64 %indvars.iv, 100
+  br i1 %exitcond, label %bb14, label %bb23
+
+bb14:                                             ; preds = %bb12
+  %tmp = add nsw i32 %.0, -3
+  %tmp15 = add nuw nsw i64 %indvars.iv6, 3
+  %tmp16 = trunc i64 %tmp15 to i32
+  %tmp17 = mul nsw i32 %tmp, %tmp16
+  %tmp18 = trunc i64 %indvars.iv6 to i32
+  %tmp19 = srem i32 %tmp17, %tmp18
+  %tmp20 = getelementptr inbounds [1024 x [1024 x i32]], [1024 x [1024 x i32]]* @A, i64 0, i64 %indvars.iv6, i64 %indvars.iv
+  store i32 %tmp19, i32* %tmp20, align 4
+  br label %bb21
+
+bb21:                                             ; preds = %bb14
+  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
+  br label %bb12
+
+bb23:                                             ; preds = %bb33, %bb12
+  %indvars.iv3 = phi i64 [ %indvars.iv.next4, %bb33 ], [ 0, %bb12 ]
+  %exitcond5 = icmp ne i64 %indvars.iv3, 100
+  br i1 %exitcond5, label %bb25, label %bb35
+
+bb25:                                             ; preds = %bb23
+  %tmp26 = add nsw i32 %.0, -3
+  %tmp27 = add nuw nsw i64 %indvars.iv6, 3
+  %tmp28 = trunc i64 %tmp27 to i32
+  %tmp29 = mul nsw i32 %tmp26, %tmp28
+  %tmp30 = trunc i64 %indvars.iv6 to i32
+  %tmp31 = srem i32 %tmp29, %tmp30
+  %tmp32 = getelementptr inbounds [1024 x [1024 x i32]], [1024 x [1024 x i32]]* @B, i64 0, i64 %indvars.iv6, i64 %indvars.iv3
+  store i32 %tmp31, i32* %tmp32, align 4
+  br label %bb33
+
+bb33:                                             ; preds = %bb25
+  %indvars.iv.next4 = add nuw nsw i64 %indvars.iv3, 1
+  br label %bb23
+
+bb35:                                             ; preds = %bb23
+  %indvars.iv.next7 = add nuw nsw i64 %indvars.iv6, 1
+  %tmp36 = add nuw nsw i32 %.0, 1
+  br label %bb9
+
+bb37:                                             ; preds = %bb10
+  ret void
+}