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Frontend: add a new action -scan-clang-dependencies to scan a PCM's dependencies

Browse Source 
For the issue mentioned in rdar://67079780, swift-driver needs to run clang dependencies
scanner multiple times with different target triples for a Swift target. This patch adds
a new scanning action to generate the JSON file for a given clang module to accommodate
this requirement.

Resolves: rdar://problem/67269210
This commit is contained in:
Xi Ge
2020-08-17 16:59:06 -07:00
parent b1eccb594d
commit 9988911232
8 changed files with 99 additions and 1 deletions
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13
lib/Frontend/FrontendOptions.cpp
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@@ -64,6 +64,7 @@ bool FrontendOptions::needsProperModuleName(ActionType action) {
case ActionType::DumpTypeInfo:
case ActionType::EmitPCM:
case ActionType::ScanDependencies:
case ActionType::ScanClangDependencies:
return true;
}
llvm_unreachable("Unknown ActionType");
@@ -77,6 +78,7 @@ bool FrontendOptions::shouldActionOnlyParse(ActionType action) {
case FrontendOptions::ActionType::DumpInterfaceHash:
case FrontendOptions::ActionType::EmitImportedModules:
case FrontendOptions::ActionType::ScanDependencies:
case FrontendOptions::ActionType::ScanClangDependencies:
case FrontendOptions::ActionType::PrintVersion:
return true;
default:
@@ -174,6 +176,7 @@ FrontendOptions::formatForPrincipalOutputFileForAction(ActionType action) {
return TY_ClangModuleFile;
case ActionType::ScanDependencies:
case ActionType::ScanClangDependencies:
return TY_JSONDependencies;
}
llvm_unreachable("unhandled action");
@@ -213,6 +216,7 @@ bool FrontendOptions::canActionEmitDependencies(ActionType action) {
case ActionType::EmitImportedModules:
case ActionType::EmitPCM:
case ActionType::ScanDependencies:
case ActionType::ScanClangDependencies:
return true;
}
llvm_unreachable("unhandled action");
@@ -237,6 +241,7 @@ bool FrontendOptions::canActionEmitReferenceDependencies(ActionType action) {
case ActionType::EmitPCM:
case ActionType::DumpPCM:
case ActionType::ScanDependencies:
case ActionType::ScanClangDependencies:
case ActionType::PrintVersion:
return false;
case ActionType::Typecheck:
@@ -285,6 +290,7 @@ bool FrontendOptions::canActionEmitObjCHeader(ActionType action) {
case ActionType::EmitPCM:
case ActionType::DumpPCM:
case ActionType::ScanDependencies:
case ActionType::ScanClangDependencies:
case ActionType::PrintVersion:
return false;
case ActionType::Typecheck:
@@ -322,6 +328,7 @@ bool FrontendOptions::canActionEmitLoadedModuleTrace(ActionType action) {
case ActionType::EmitPCM:
case ActionType::DumpPCM:
case ActionType::ScanDependencies:
case ActionType::ScanClangDependencies:
case ActionType::PrintVersion:
return false;
case ActionType::ResolveImports:
@@ -365,6 +372,7 @@ bool FrontendOptions::canActionEmitModule(ActionType action) {
case ActionType::EmitPCM:
case ActionType::DumpPCM:
case ActionType::ScanDependencies:
case ActionType::ScanClangDependencies:
case ActionType::PrintVersion:
return false;
case ActionType::MergeModules:
@@ -409,6 +417,7 @@ bool FrontendOptions::canActionEmitInterface(ActionType action) {
case ActionType::EmitPCM:
case ActionType::DumpPCM:
case ActionType::ScanDependencies:
case ActionType::ScanClangDependencies:
return false;
case ActionType::Typecheck:
case ActionType::MergeModules:
@@ -454,6 +463,7 @@ bool FrontendOptions::doesActionProduceOutput(ActionType action) {
case ActionType::EmitPCM:
case ActionType::DumpPCM:
case ActionType::ScanDependencies:
case ActionType::ScanClangDependencies:
return true;
case ActionType::NoneAction:
@@ -499,6 +509,7 @@ bool FrontendOptions::doesActionProduceTextualOutput(ActionType action) {
case ActionType::DumpTypeInfo:
case ActionType::DumpPCM:
case ActionType::ScanDependencies:
case ActionType::ScanClangDependencies:
case ActionType::PrintVersion:
return true;
}
@@ -524,6 +535,7 @@ bool FrontendOptions::doesActionGenerateSIL(ActionType action) {
case ActionType::EmitPCM:
case ActionType::DumpPCM:
case ActionType::ScanDependencies:
case ActionType::ScanClangDependencies:
case ActionType::PrintVersion:
return false;
case ActionType::EmitSILGen:
@@ -570,6 +582,7 @@ bool FrontendOptions::doesActionGenerateIR(ActionType action) {
case ActionType::EmitPCM:
case ActionType::DumpPCM:
case ActionType::ScanDependencies:
case ActionType::ScanClangDependencies:
case ActionType::PrintVersion:
return false;
case ActionType::Immediate: