Allocate TargetLibraryInfo for the CodeGen passes. Otherwise, it's instantiated

by the BAA pass, which uses the default TargetLibraryInfo constructor.
Unfortunately, the default TargetLibraryInfo constructor assumes all library
calls are available and thus ignores -fno-builtin.
rdar://10947759

llvm-svn: 151745

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/BackendUtil.cpp b/clang/lib/CodeGen/BackendUtil.cpp
index d175bd5e083..d9bdc325c10 100644
--- a/clang/lib/CodeGen/BackendUtil.cpp
+++ b/clang/lib/CodeGen/BackendUtil.cpp
@@ -351,6 +351,12 @@ bool EmitAssemblyHelper::AddEmitPasses(BackendAction Action,
   // Create the code generator passes.
   PassManager *PM = getCodeGenPasses();
 
+  // Add LibraryInfo.
+  TargetLibraryInfo *TLI = new TargetLibraryInfo();
+  if (!CodeGenOpts.SimplifyLibCalls)
+    TLI->disableAllFunctions();
+  PM->add(TLI);
+
   // Normal mode, emit a .s or .o file by running the code generator. Note,
   // this also adds codegenerator level optimization passes.
   TargetMachine::CodeGenFileType CGFT = TargetMachine::CGFT_AssemblyFile;