Revert "Reapply "[clang][deps] Support inferred modules""

This reverts commit c98833c.
The test `ClangScanDeps/modules-inferred-explicit-build.m` creates files
in the current directory.

Author: frgossen

clang/lib/Tooling/DependencyScanning/ModuleDepCollector.cpp

@@ -33,6 +33,7 @@ makeInvocationForModuleBuildWithoutPaths(const ModuleDeps &Deps,
   CI.getFrontendOpts().IsSystemModule = Deps.IsSystem;
 
   CI.getLangOpts()->ImplicitModules = false;
+  CI.getHeaderSearchOpts().ImplicitModuleMaps = false;
 
   return CI;
 }
@@ -178,22 +179,13 @@ ModuleID ModuleDepCollectorPP::handleTopLevelModule(const Module *M) {
   const FileEntry *ModuleMap = Instance.getPreprocessor()
                                    .getHeaderSearchInfo()
                                    .getModuleMap()
-                                   .getModuleMapFileForUniquing(M);
+                                   .getContainingModuleMapFile(M);
   MD.ClangModuleMapFile = std::string(ModuleMap ? ModuleMap->getName() : "");
 
   serialization::ModuleFile *MF =
       MDC.Instance.getASTReader()->getModuleManager().lookup(M->getASTFile());
   MDC.Instance.getASTReader()->visitInputFiles(
       *MF, true, true, [&](const serialization::InputFile &IF, bool isSystem) {
-        // __inferred_module.map is the result of the way in which an implicit
-        // module build handles inferred modules. It adds an overlay VFS with
-        // this file in the proper directory and relies on the rest of Clang to
-        // handle it like normal. With explicitly built modules we don't need
-        // to play VFS tricks, so replace it with the correct module map.
-        if (IF.getFile()->getName().endswith("__inferred_module.map")) {
-          MD.FileDeps.insert(ModuleMap->getName());
-          return;
-        }
         MD.FileDeps.insert(IF.getFile()->getName());
       });
 

clang/test/ClangScanDeps/Inputs/frameworks/Inferred.framework/Frameworks/Sub.framework/Headers/Sub.h

@@ -48,6 +48,7 @@
 // CHECK:              "-emit-module"
 // CHECK-NO-ABS-NOT:   "-fmodule-file={{.*}}"
 // CHECK-ABS:          "-fmodule-file=[[PREFIX]]/module-cache{{(_clangcl)?}}/[[CONTEXT_HASH_H1]]/header2-{{[A-Z0-9]+}}.pcm"
+// CHECK-NOT:          "-fimplicit-module-maps"
 // CHECK:              "-fmodule-name=header1"
 // CHECK:              "-fno-implicit-modules"
 // CHECK:            ],
@@ -64,6 +65,7 @@
 // CHECK-NEXT:       "command-line": [
 // CHECK-NEXT:         "-cc1",
 // CHECK:              "-emit-module",
+// CHECK-NOT:          "-fimplicit-module-maps",
 // CHECK:              "-fmodule-name=header1",
 // CHECK:              "-fno-implicit-modules",
 // CHECK:            ],
@@ -80,6 +82,7 @@
 // CHECK-NEXT:       "command-line": [
 // CHECK-NEXT:         "-cc1",
 // CHECK:              "-emit-module",
+// CHECK-NOT:          "-fimplicit-module-maps",
 // CHECK:              "-fmodule-name=header2",
 // CHECK:              "-fno-implicit-modules",
 // CHECK:            ],