[LLD/MinGW]: Expose --thinlto-cache-dir

Differential Revision: https://reviews.llvm.org/D80438
justinfargnoli · May 24, 2020 · f794808 · f794808
1 parent 8310c9b
commit f794808
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diff --git a/lld/MinGW/Driver.cpp b/lld/MinGW/Driver.cpp
@@ -249,6 +249,8 @@ bool mingw::link(ArrayRef<const char *> argsArr, bool canExitEarly,
     add("-lldmap:" + StringRef(a->getValue()));
   if (auto *a = args.getLastArg(OPT_reproduce))
     add("-reproduce:" + StringRef(a->getValue()));
+  if (auto *a = args.getLastArg(OPT_thinlto_cache_dir))
+    add("-lldltocache:" + StringRef(a->getValue()));
 
   if (auto *a = args.getLastArg(OPT_o))
     add("-out:" + StringRef(a->getValue()));

diff --git a/lld/MinGW/Options.td b/lld/MinGW/Options.td
@@ -88,6 +88,8 @@ def appcontainer: F<"appcontainer">, HelpText<"Set the appcontainer flag in the
 defm delayload: Eq<"delayload", "DLL to load only on demand">;
 def mllvm: S<"mllvm">;
 defm pdb: Eq<"pdb", "Output PDB debug info file, chosen implicitly if the argument is empty">;
+defm thinlto_cache_dir: EqLong<"thinlto-cache-dir",
+  "Path to ThinLTO cached object file directory">;
 def Xlink : J<"Xlink=">, MetaVarName<"<arg>">,
     HelpText<"Pass <arg> to the COFF linker">;
 

diff --git a/lld/test/MinGW/driver.test b/lld/test/MinGW/driver.test
@@ -241,3 +241,6 @@ ENABLE_RUNTIME_PSEUDO_RELOC: -runtime-pseudo-reloc{{ }}
 RUN: ld.lld -### -m i386pep foo.o --disable-runtime-pseudo-reloc | FileCheck -check-prefix DISABLE_RUNTIME_PSEUDO_RELOC %s
 RUN: ld.lld -### -m i386pep foo.o -disable-runtime-pseudo-reloc | FileCheck -check-prefix DISABLE_RUNTIME_PSEUDO_RELOC %s
 DISABLE_RUNTIME_PSEUDO_RELOC: -runtime-pseudo-reloc:no
+
+RUN: ld.lld -### foo.o -m i386pe --thinlto-cache-dir=_foo | FileCheck -check-prefix=THINLTO_CACHEDIR %s
+THINLTO_CACHEDIR: -lldltocache:_foo