Add support for -fno-builtin to LTO and ThinLTO to libLTO
Reviewers: tejohnson, pcc
Subscribers: Prazek, dexonsmith, llvm-commits
Differential Revision: https://reviews.llvm.org/D30791
llvm-svn: 298936
diff --git a/llvm/tools/lto/lto.cpp b/llvm/tools/lto/lto.cpp
index a1dd4eb..e28c7aa 100644
--- a/llvm/tools/lto/lto.cpp
+++ b/llvm/tools/lto/lto.cpp
@@ -44,9 +44,13 @@
DisableGVNLoadPRE("disable-gvn-loadpre", cl::init(false),
cl::desc("Do not run the GVN load PRE pass"));
-static cl::opt<bool>
-DisableLTOVectorization("disable-lto-vectorization", cl::init(false),
- cl::desc("Do not run loop or slp vectorization during LTO"));
+static cl::opt<bool> DisableLTOVectorization(
+ "disable-lto-vectorization", cl::init(false),
+ cl::desc("Do not run loop or slp vectorization during LTO"));
+
+static cl::opt<bool> EnableFreestanding(
+ "lto-freestanding", cl::init(false),
+ cl::desc("Enable Freestanding (disable builtins / TLI) during LTO"));
#ifdef NDEBUG
static bool VerifyByDefault = false;
@@ -159,6 +163,7 @@
if (OptLevel < '0' || OptLevel > '3')
report_fatal_error("Optimization level must be between 0 and 3");
CG->setOptLevel(OptLevel - '0');
+ CG->setFreestanding(EnableFreestanding);
}
extern const char* lto_get_version() {
@@ -464,6 +469,7 @@
lto_initialize();
ThinLTOCodeGenerator *CodeGen = new ThinLTOCodeGenerator();
CodeGen->setTargetOptions(InitTargetOptionsFromCodeGenFlags());
+ CodeGen->setFreestanding(EnableFreestanding);
if (OptLevel.getNumOccurrences()) {
if (OptLevel < '0' || OptLevel > '3')