Imported Upstream version 5.18.0.246

Former-commit-id: 0c7ce5b1a7851e13f22acfd379b7f9fb304e4833

external/llvm/test/Transforms/GVNHoist/hoist-very-busy.ll

@@ -0,0 +1,55 @@
+; RUN: opt -S -gvn-hoist < %s | FileCheck %s
+
+%struct.__jmp_buf_tag = type { [8 x i64], i32 }
+
+; Check that hoisting only happens when the expression is very busy.
+; CHECK: store
+; CHECK: store
+
+@test_exit_buf = global %struct.__jmp_buf_tag zeroinitializer
+@G = global i32 0
+
+define void @test_command(i32 %c1) {
+entry:
+  switch i32 %c1, label %exit [
+    i32 0, label %sw0
+    i32 1, label %sw1
+  ]
+
+sw0:
+  store i32 1, i32* @G
+  br label %exit
+
+sw1:
+  store i32 1, i32* @G
+  br label %exit
+
+exit:
+  call void @longjmp(%struct.__jmp_buf_tag* @test_exit_buf, i32 1) #0
+  unreachable
+}
+
+declare void @longjmp(%struct.__jmp_buf_tag*, i32) #0
+
+attributes #0 = { noreturn nounwind }
+
+; Check that the store is hoisted.
+; CHECK-LABEL: define void @fun(
+; CHECK: store
+; CHECK-NOT: store
+
+define void @fun() {
+entry:
+  br label %if.then
+
+if.then:                                          ; preds = %entry
+  br i1 undef, label %sw0, label %sw1
+
+sw0:
+  store i32 1, i32* @G
+  unreachable
+
+sw1:
+  store i32 1, i32* @G
+  ret void
+}