1 files changed, 107 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/Hexagon/bug6757-endloop.ll b/llvm/test/CodeGen/Hexagon/bug6757-endloop.ll
new file mode 100644
index 00000000000..a4e593fa2ba
--- /dev/null
+++ b/llvm/test/CodeGen/Hexagon/bug6757-endloop.ll
@@ -0,0 +1,107 @@
+; RUN: llc -march=hexagon < %s | FileCheck %s
+
+; Make sure that we can handle loops with multiple ENDLOOP instructions.
+; This situation can arise due to tail duplication.
+
+; CHECK: loop1([[LP:.LBB0_[0-9]+]]
+; CHECK: [[LP]]:
+; CHECK-NOT: loop1(
+; CHECK: endloop1
+; CHECK: endloop1
+
+%s.0 = type { i32, i8* }
+%s.1 = type { i32, i32, i32, i32 }
+
+define void @f0(%s.0* nocapture readonly %a0, %s.1* nocapture readonly %a1) {
+b0:
+  %v0 = getelementptr inbounds %s.1, %s.1* %a1, i32 0, i32 0
+  %v1 = load i32, i32* %v0, align 4
+  %v2 = getelementptr inbounds %s.1, %s.1* %a1, i32 0, i32 3
+  %v3 = load i32, i32* %v2, align 4
+  %v4 = getelementptr inbounds %s.1, %s.1* %a1, i32 0, i32 2
+  %v5 = load i32, i32* %v4, align 4
+  %v6 = getelementptr inbounds %s.1, %s.1* %a1, i32 0, i32 1
+  %v7 = load i32, i32* %v6, align 4
+  %v8 = getelementptr inbounds %s.0, %s.0* %a0, i32 0, i32 1
+  %v9 = load i8*, i8** %v8, align 4
+  %v10 = bitcast i8* %v9 to i32*
+  %v11 = mul i32 %v1, 10
+  %v12 = icmp eq i32 %v1, %v3
+  %v13 = icmp eq i32 %v5, 0
+  br i1 %v12, label %b3, label %b1
+
+b1:                                               ; preds = %b0
+  br i1 %v13, label %b14, label %b2
+
+b2:                                               ; preds = %b1
+  %v14 = lshr i32 %v11, 5
+  %v15 = getelementptr inbounds i32, i32* %v10, i32 %v14
+  %v16 = and i32 %v11, 30
+  %v17 = icmp eq i32 %v16, 0
+  br label %b11
+
+b3:                                               ; preds = %b0
+  br i1 %v13, label %b14, label %b4
+
+b4:                                               ; preds = %b3
+  %v18 = getelementptr inbounds %s.0, %s.0* %a0, i32 0, i32 0
+  br label %b5
+
+b5:                                               ; preds = %b6, %b4
+  %v19 = phi i32 [ %v11, %b4 ], [ %v22, %b6 ]
+  %v20 = phi i32 [ %v5, %b4 ], [ %v21, %b6 ]
+  %v21 = add i32 %v20, -1
+  %v22 = add i32 %v19, -10
+  %v23 = lshr i32 %v22, 5
+  %v24 = getelementptr inbounds i32, i32* %v10, i32 %v23
+  %v25 = and i32 %v22, 31
+  %v26 = load i32, i32* %v18, align 4
+  %v27 = mul i32 %v26, %v7
+  %v28 = icmp eq i32 %v25, 0
+  br i1 %v28, label %b7, label %b6
+
+b6:                                               ; preds = %b10, %b9, %b8, %b5
+  %v29 = icmp eq i32 %v21, 0
+  br i1 %v29, label %b14, label %b5
+
+b7:                                               ; preds = %b5
+  %v30 = icmp ugt i32 %v27, 1
+  br i1 %v30, label %b8, label %b9
+
+b8:                                               ; preds = %b7
+  %v31 = icmp ugt i32 %v27, 3
+  br i1 %v31, label %b10, label %b6
+
+b9:                                               ; preds = %b7
+  %v32 = load volatile i32, i32* %v24, align 4
+  store volatile i32 %v32, i32* %v24, align 4
+  br label %b6
+
+b10:                                              ; preds = %b10, %b8
+  %v33 = phi i32 [ %v37, %b10 ], [ %v27, %b8 ]
+  %v34 = phi i32* [ %v35, %b10 ], [ %v24, %b8 ]
+  %v35 = getelementptr inbounds i32, i32* %v34, i32 -1
+  %v36 = load volatile i32, i32* %v34, align 4
+  %v37 = add i32 %v33, -4
+  %v38 = icmp ugt i32 %v37, 3
+  br i1 %v38, label %b10, label %b6
+
+b11:                                              ; preds = %b12, %b2
+  %v39 = phi i32 [ %v5, %b2 ], [ %v40, %b12 ]
+  %v40 = add i32 %v39, -1
+  br i1 %v17, label %b13, label %b12
+
+b12:                                              ; preds = %b13, %b11
+  %v41 = icmp eq i32 %v40, 0
+  br i1 %v41, label %b14, label %b11
+
+b13:                                              ; preds = %b11
+  %v42 = load volatile i32, i32* %v15, align 4
+  %v43 = load volatile i32, i32* %v15, align 4
+  %v44 = and i32 %v43, %v42
+  store volatile i32 %v44, i32* %v15, align 4
+  br label %b12
+
+b14:                                              ; preds = %b12, %b6, %b3, %b1
+  ret void
+}