Imported Upstream version 5.18.0.246

Former-commit-id: 0c7ce5b1a7851e13f22acfd379b7f9fb304e4833

external/llvm/test/Transforms/GlobalOpt/cleanup-pointer-root-users.ll

@@ -0,0 +1,49 @@
+; RUN: opt -globalopt -S -o - < %s | FileCheck %s
+
+@glbl = internal global i8* null
+
+define void @test1a() {
+; CHECK-LABEL: @test1a(
+; CHECK-NOT: store
+; CHECK-NEXT: ret void
+  store i8* null, i8** @glbl
+  ret void
+}
+
+define void @test1b(i8* %p) {
+; CHECK-LABEL: @test1b(
+; CHECK-NEXT: store
+; CHECK-NEXT: ret void
+  store i8* %p, i8** @glbl
+  ret void
+}
+
+define void @test2() {
+; CHECK-LABEL: @test2(
+; CHECK: alloca i8
+  %txt = alloca i8
+  call void @foo2(i8* %txt)
+  %call2 = call i8* @strdup(i8* %txt)
+  store i8* %call2, i8** @glbl
+  ret void
+}
+declare i8* @strdup(i8*)
+declare void @foo2(i8*)
+
+define void @test3() uwtable personality i32 (i32, i64, i8*, i8*)* @__gxx_personality_v0 {
+; CHECK-LABEL: @test3(
+; CHECK-NOT: bb1:
+; CHECK-NOT: bb2:
+; CHECK: invoke
+  %ptr = invoke i8* @_Znwm(i64 1)
+          to label %bb1 unwind label %bb2
+bb1:
+  store i8* %ptr, i8** @glbl
+  unreachable
+bb2:
+  %tmp1 = landingpad { i8*, i32 }
+          cleanup
+  resume { i8*, i32 } %tmp1
+}
+declare i32 @__gxx_personality_v0(i32, i64, i8*, i8*)
+declare i8* @_Znwm(i64)