During LTO, we call 'dsymutil' when we compile source files. This necessitates
clang specifying a temporary file that it later cleans up so that it can survive
the linking stage. However, when we compile object files during LTO we don't
call 'dsymutil'. That's done at a different stage (if at all). We rely upon the
linker to specify a unique name for the temporary file it generates.
<rdar://problem/12401423>
llvm-svn: 165028
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 97b3c4e..86781cc 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -4175,9 +4175,22 @@
CmdArgs.push_back("-force_cpusubtype_ALL");
}
+bool darwin::Link::NeedsTempPath(const InputInfoList &Inputs) const {
+ // We only need to generate a temp path for LTO if we aren't compiling object
+ // files. When compiling source files, we run 'dsymutil' after linking. We
+ // don't run 'dsymutil' when compiling object files.
+ for (InputInfoList::const_iterator
+ it = Inputs.begin(), ie = Inputs.end(); it != ie; ++it)
+ if (it->getType() != types::TY_Object)
+ return true;
+
+ return false;
+}
+
void darwin::Link::AddLinkArgs(Compilation &C,
const ArgList &Args,
- ArgStringList &CmdArgs) const {
+ ArgStringList &CmdArgs,
+ const InputInfoList &Inputs) const {
const Driver &D = getToolChain().getDriver();
const toolchains::Darwin &DarwinTC = getDarwinToolChain();
@@ -4216,7 +4229,7 @@
// If we are using LTO, then automatically create a temporary file path for
// the linker to use, so that it's lifetime will extend past a possible
// dsymutil step.
- if (Version[0] >= 116 && D.IsUsingLTO(Args)) {
+ if (Version[0] >= 116 && D.IsUsingLTO(Args) && NeedsTempPath(Inputs)) {
const char *TmpPath = C.getArgs().MakeArgString(
D.GetTemporaryPath("cc", types::getTypeTempSuffix(types::TY_Object)));
C.addTempFile(TmpPath);
@@ -4403,7 +4416,7 @@
// I'm not sure why this particular decomposition exists in gcc, but
// we follow suite for ease of comparison.
- AddLinkArgs(C, Args, CmdArgs);
+ AddLinkArgs(C, Args, CmdArgs, Inputs);
Args.AddAllArgs(CmdArgs, options::OPT_d_Flag);
Args.AddAllArgs(CmdArgs, options::OPT_s);