[Beignet] [PATCH] Add uncompatible PCH Options to avoid compiling failure.

[junyan.he at inbox.com]

From: Junyan He <junyan.he at linux.intel.com>

Signed-off-by: Junyan He <junyan.he at linux.intel.com>
---
 backend/src/backend/program.cpp |   15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/backend/src/backend/program.cpp b/backend/src/backend/program.cpp
index 092398c..30e7a0b 100644
--- a/backend/src/backend/program.cpp
+++ b/backend/src/backend/program.cpp
@@ -629,6 +629,7 @@ namespace gbe {
     std::istringstream idirs(dirs);
     std::string pchFileName;
     bool findPCH = false;
+    bool invalidPCH = false;
     size_t start = 0, end = 0;
 
     std::string hdirs = OCL_HEADER_FILE_DIR;
@@ -653,6 +654,10 @@ namespace gbe {
       std::string optionStr(str);
       const std::string unsupportedOptions("-cl-denorms-are-zero, -cl-strict-aliasing, -cl-opt-disable,"
                        "-cl-no-signed-zeros, -cl-fp32-correctly-rounded-divide-sqrt");
+
+      const std::string uncompatiblePCHOptions = ("-cl-single-precision-constant, -cl-fast-relaxed-math");
+      const std::string fastMathOption = ("-cl-fast-relaxed-math");
+
       while (end != std::string::npos) {
         end = optionStr.find(' ', start);
         std::string str = optionStr.substr(start, end - start);
@@ -663,6 +668,14 @@ namespace gbe {
         if(unsupportedOptions.find(str) != std::string::npos)
           continue;
 
+        if (uncompatiblePCHOptions.find(str) != std::string::npos)
+          invalidPCH = true;
+
+        if (fastMathOption.find(str) != std::string::npos) {
+          clOpt.push_back("-D");
+          clOpt.push_back("__FAST_RELAXED_MATH__=1");
+        }
+
         clOpt.push_back(str);
       }
       free(str);
@@ -688,7 +701,7 @@ namespace gbe {
     FILE *clFile = fdopen(clFd, "w");
     FATAL_IF(clFile == NULL, "Failed to open temporary file");
 
-    if (!findPCH) {
+    if (!findPCH || invalidPCH) {
       clOpt.push_back("-include");
       clOpt.push_back("ocl.h");
     } else {
-- 
1.7.9.5