[Beignet] [PATCH 1/3] GBE: Inline all function calls.

[Ruiling Song]

use an extra large value for llvm flag -inline-threshold to inline all functions.

Signed-off-by: Ruiling Song <ruiling.song at intel.com>
---
 backend/src/backend/program.cpp |   14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/backend/src/backend/program.cpp b/backend/src/backend/program.cpp
index 222dfe9..b2879a4 100644
--- a/backend/src/backend/program.cpp
+++ b/backend/src/backend/program.cpp
@@ -473,6 +473,8 @@ namespace gbe {
       useless.push_back(str);
       args.push_back(str.c_str());
     }
+    args.push_back("-mllvm");
+    args.push_back("-inline-threshold=200000");
 #ifdef GEN7_SAMPLER_CLAMP_BORDER_WORKAROUND
     args.push_back("-DGEN7_SAMPLER_CLAMP_BORDER_WORKAROUND");
 #endif
@@ -537,6 +539,18 @@ namespace gbe {
     clang::LangOptions & lang_opts = Clang.getLangOpts();
     lang_opts.OpenCL = 1;
 
+    //llvm flags need command line parsing to take effect
+    if (!Clang.getFrontendOpts().LLVMArgs.empty()) {
+      unsigned NumArgs = Clang.getFrontendOpts().LLVMArgs.size();
+      const char **Args = new const char*[NumArgs + 2];
+      Args[0] = "clang (LLVM option parsing)";
+      for (unsigned i = 0; i != NumArgs; ++i){
+        Args[i + 1] = Clang.getFrontendOpts().LLVMArgs[i].c_str();
+      }
+      Args[NumArgs + 1] = 0;
+      llvm::cl::ParseCommandLineOptions(NumArgs + 1, Args);
+    }
+
     // Create an action and make the compiler instance carry it out
     llvm::OwningPtr<clang::CodeGenAction> Act(new clang::EmitLLVMOnlyAction());
     if (!Clang.ExecuteAction(*Act))
-- 
1.7.9.5