commit b5a46c1f45a7ecbcfc99b682000bbc8c0b7712a5
author Mehdi Amini <mehdi.amini@apple.com> Tue Mar 28 18:55:44 2017 +0000
committer Mehdi Amini <mehdi.amini@apple.com> Tue Mar 28 18:55:44 2017 +0000
tree 972dd2ecfc3057b58307a5a21430ddaf51bef889
parent 9053f22eeb3ab0f1f0089e4e6b98093891d361bb

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

llvm/tools/llvm-lto/llvm-lto.cpp

diff --git a/llvm/tools/llvm-lto/llvm-lto.cpp b/llvm/tools/llvm-lto/llvm-lto.cpp
index 475350c..2f00541 100644
--- a/llvm/tools/llvm-lto/llvm-lto.cpp
+++ b/llvm/tools/llvm-lto/llvm-lto.cpp
@@ -63,6 +63,10 @@
     "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"));
+
 static cl::opt<bool> UseDiagnosticHandler(
     "use-diagnostic-handler", cl::init(false),
     cl::desc("Use a diagnostic handler to test the handler interface"));
@@ -433,6 +437,7 @@
     ThinGenerator.setCodePICModel(getRelocModel());
     ThinGenerator.setTargetOptions(Options);
     ThinGenerator.setCacheDir(ThinLTOCacheDir);
+    ThinGenerator.setFreestanding(EnableFreestanding);
 
     // Add all the exported symbols to the table of symbols to preserve.
     for (unsigned i = 0; i < ExportedSymbols.size(); ++i)
@@ -809,6 +814,7 @@
     CodeGen.setDiagnosticHandler(handleDiagnostics, nullptr);
 
   CodeGen.setCodePICModel(getRelocModel());
+  CodeGen.setFreestanding(EnableFreestanding);
 
   CodeGen.setDebugInfo(LTO_DEBUG_MODEL_DWARF);
   CodeGen.setTargetOptions(Options);

llvm/tools/lto/lto.cpp

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')