[ThinLTO] Option to control path of distributed backend files
Summary:
Add support to control where files for a distributed backend (the
individual index files and optional imports files) are created.
This is invoked with a new thinlto-prefix-replace option in the gold
plugin and llvm-lto. If specified, expects a string of the form
"oldprefix:newprefix", and instead of generating these files in the
same directory path as the corresponding bitcode file, will use a path
formed by replacing the bitcode file's path prefix matching oldprefix
with newprefix.
Also add a new replace_path_prefix helper to Path.h in libSupport.
Depends on D19636.
Reviewers: joker.eph
Subscribers: llvm-commits, joker.eph
Differential Revision: http://reviews.llvm.org/D19644
llvm-svn: 269771
diff --git a/llvm/unittests/Support/Path.cpp b/llvm/unittests/Support/Path.cpp
index 70bbf24..ad2267d 100644
--- a/llvm/unittests/Support/Path.cpp
+++ b/llvm/unittests/Support/Path.cpp
@@ -970,4 +970,29 @@
EXPECT_EQ("c", Path1);
#endif
}
+
+TEST(Support, ReplacePathPrefix) {
+ SmallString<64> Path1("/foo");
+ SmallString<64> Path2("/old/foo");
+ SmallString<64> OldPrefix("/old");
+ SmallString<64> NewPrefix("/new");
+ SmallString<64> NewPrefix2("/longernew");
+ SmallString<64> EmptyPrefix("");
+
+ SmallString<64> Path = Path1;
+ path::replace_path_prefix(Path, OldPrefix, NewPrefix);
+ EXPECT_EQ(Path, "/foo");
+ Path = Path2;
+ path::replace_path_prefix(Path, OldPrefix, NewPrefix);
+ EXPECT_EQ(Path, "/new/foo");
+ Path = Path2;
+ path::replace_path_prefix(Path, OldPrefix, NewPrefix2);
+ EXPECT_EQ(Path, "/longernew/foo");
+ Path = Path1;
+ path::replace_path_prefix(Path, EmptyPrefix, NewPrefix);
+ EXPECT_EQ(Path, "/new/foo");
+ Path = Path2;
+ path::replace_path_prefix(Path, OldPrefix, EmptyPrefix);
+ EXPECT_EQ(Path, "/foo");
+}
} // anonymous namespace