Imported Upstream version 5.18.0.246

Former-commit-id: 0c7ce5b1a7851e13f22acfd379b7f9fb304e4833

external/llvm/test/Verifier/musttail-valid.ll

@@ -0,0 +1,39 @@
+; RUN: llvm-as %s -o /dev/null
+
+; Should assemble without error.
+
+declare void @similar_param_ptrty_callee(i8*)
+define void @similar_param_ptrty(i32*) {
+  musttail call void @similar_param_ptrty_callee(i8* null)
+  ret void
+}
+
+declare i8* @similar_ret_ptrty_callee()
+define i32* @similar_ret_ptrty() {
+  %v = musttail call i8* @similar_ret_ptrty_callee()
+  %w = bitcast i8* %v to i32*
+  ret i32* %w
+}
+
+declare x86_thiscallcc void @varargs_thiscall(i8*, ...)
+define x86_thiscallcc void @varargs_thiscall_thunk(i8* %this, ...) {
+  musttail call x86_thiscallcc void (i8*, ...) @varargs_thiscall(i8* %this, ...)
+  ret void
+}
+
+declare x86_fastcallcc void @varargs_fastcall(i8*, ...)
+define x86_fastcallcc void @varargs_fastcall_thunk(i8* %this, ...) {
+  musttail call x86_fastcallcc void (i8*, ...) @varargs_fastcall(i8* %this, ...)
+  ret void
+}
+
+define x86_thiscallcc void @varargs_thiscall_unreachable(i8* %this, ...) {
+  unreachable
+}
+
+define x86_thiscallcc void @varargs_thiscall_ret_unreachable(i8* %this, ...) {
+  musttail call x86_thiscallcc void (i8*, ...) @varargs_thiscall(i8* %this, ...)
+  ret void
+bb1:
+  ret void
+}