1 files changed, 70 insertions, 0 deletions
diff --git a/llvm/test/Transforms/DeadStoreElimination/free.ll b/llvm/test/Transforms/DeadStoreElimination/free.ll
new file mode 100644
index 00000000000..5cfe7263c0b
--- /dev/null
+++ b/llvm/test/Transforms/DeadStoreElimination/free.ll
@@ -0,0 +1,70 @@
+; RUN: opt < %s -basicaa -dse -S | FileCheck %s
+
+target datalayout = "e-p:64:64:64"
+
+declare void @free(i8* nocapture)
+declare noalias i8* @malloc(i64)
+
+; CHECK-LABEL: @test(
+; CHECK-NEXT: bitcast
+; CHECK-NEXT: @free
+; CHECK-NEXT: ret void
+define void @test(i32* %Q, i32* %P) {
+        %DEAD = load i32, i32* %Q            ; <i32> [#uses=1]
+        store i32 %DEAD, i32* %P
+        %1 = bitcast i32* %P to i8*
+        tail call void @free(i8* %1) nounwind
+        ret void
+}
+
+; CHECK-LABEL: @test2(
+; CHECK-NEXT: bitcast
+; CHECK-NEXT: @free
+; CHECK-NEXT: ret void
+define void @test2({i32, i32}* %P) {
+	%Q = getelementptr {i32, i32}, {i32, i32} *%P, i32 0, i32 1
+	store i32 4, i32* %Q
+        %1 = bitcast {i32, i32}* %P to i8*
+        tail call void @free(i8* %1) nounwind
+	ret void
+}
+
+; CHECK-LABEL: @test3(
+; CHECK-NOT: store
+; CHECK: ret void
+define void @test3() {
+  %m = call i8* @malloc(i64 24)
+  store i8 0, i8* %m
+  %m1 = getelementptr i8, i8* %m, i64 1
+  store i8 1, i8* %m1
+  call void @free(i8* %m) nounwind
+  ret void
+}
+
+; PR11240
+; CHECK-LABEL: @test4(
+; CHECK-NOT: store
+; CHECK: ret void
+define void @test4(i1 %x) nounwind {
+entry:
+  %alloc1 = tail call noalias i8* @malloc(i64 4) nounwind
+  br i1 %x, label %skipinit1, label %init1
+
+init1:
+  store i8 1, i8* %alloc1
+  br label %skipinit1
+
+skipinit1:
+  tail call void @free(i8* %alloc1) nounwind
+  ret void
+}
+
+; CHECK-LABEL: @test5(
+define void @test5() {
+  br label %bb
+
+bb:
+  tail call void @free(i8* undef) nounwind
+  br label %bb
+}
+