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Fix emission of phony dependency targets when adding extra deps 

Summary:
This commit fixes a bug where passing extra dependency entries
(using -fdepfile-entry) would result in -MP incorrectly emitting
a phony target for the input file, and no phony target for the
first extra dependency.

The extra dependencies are added first to the filename vector in
DFGImpl. That clashed with the emission of the phony targets, as
the code assumed that the first index always correspond to the
input file.

Reviewers: rsmith, pcc, krasin, bruno, vsapsai

Reviewed By: vsapsai

Subscribers: vsapsai, bruno, cfe-commits

Differential Revision: https://reviews.llvm.org/D44568

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@333413 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Stenberg 2018-05-29 13:07:58 +00:00
parent 07552f1d54
commit c01eff1a9b
2 changed files with 25 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
lib/Frontend/DependencyFile.cpp
View File

@ -163,6 +163,7 @@ class DFGImpl : public PPCallbacks {
bool SeenMissingHeader;
bool IncludeModuleFiles;
DependencyOutputFormat OutputFormat;
unsigned InputFileIndex;
private:
bool FileMatchesDepCriteria(const char *Filename,
@ -177,9 +178,11 @@ public:
AddMissingHeaderDeps(Opts.AddMissingHeaderDeps),
SeenMissingHeader(false),
IncludeModuleFiles(Opts.IncludeModuleFiles),
OutputFormat(Opts.OutputFormat) {
OutputFormat(Opts.OutputFormat),
InputFileIndex(0) {
for (const auto &ExtraDep : Opts.ExtraDeps) {
AddFilename(ExtraDep);
if (AddFilename(ExtraDep))
++InputFileIndex;
}
}
@ -201,7 +204,7 @@ public:
OutputDependencyFile();
}
void AddFilename(StringRef Filename);
bool AddFilename(StringRef Filename);
bool includeSystemHeaders() const { return IncludeSystemHeaders; }
bool includeModuleFiles() const { return IncludeModuleFiles; }
};
@ -325,9 +328,12 @@ void DFGImpl::InclusionDirective(SourceLocation HashLoc,
}
}
void DFGImpl::AddFilename(StringRef Filename) {
if (FilesSet.insert(Filename).second)
bool DFGImpl::AddFilename(StringRef Filename) {
if (FilesSet.insert(Filename).second) {
Files.push_back(Filename);
return true;
}
return false;
}
/// Print the filename, with escaping or quoting that accommodates the three
@ -463,8 +469,10 @@ void DFGImpl::OutputDependencyFile() {
// Create phony targets if requested.
if (PhonyTarget && !Files.empty()) {
// Skip the first entry, this is always the input file itself.
for (auto I = Files.begin() + 1, E = Files.end(); I != E; ++I) {
unsigned Index = 0;
for (auto I = Files.begin(), E = Files.end(); I != E; ++I) {
if (Index++ == InputFileIndex)
continue;
OS << '\n';
PrintFilename(OS, *I, OutputFormat);
OS << ":\n";

10
test/Frontend/dependency-gen-extradeps-phony.c Normal file
View File

@ -0,0 +1,10 @@
// RUN: %clang -MM -MP -Xclang -fdepfile-entry=1.extra -Xclang -fdepfile-entry=2.extra -Xclang -fdepfile-entry=2.extra %s | \
// RUN: FileCheck %s --implicit-check-not=.c:
//
// Verify that phony targets are only created for the extra dependency files,
// and not the input file.
// CHECK: dependency-gen-extradeps-phony.o: 1.extra 2.extra \
// CHECK-NEXT: dependency-gen-extradeps-phony.c
// CHECK: 1.extra:
// CHECK: 2.extra: