Add vISA FILE opcode for interleaving src file with asm dump

Change-Id: I257c91ad5cec490dfe804d33ece4e1091519a3e2

Author: weiyu-chen

IGC/Compiler/CISACodeGen/CISABuilder.cpp

@@ -5264,5 +5264,10 @@ void CEncoder::Loc(unsigned int line)
     V(vKernel->AppendVISAMiscLOC(line));
 }
 
+void CEncoder::File(std::string& s)
+{
+    V(vKernel->AppendVISAMiscFileInst(s.c_str()));
+}
+
 
 }

IGC/Compiler/CISACodeGen/CISABuilder.hpp

@@ -223,6 +223,7 @@ class CEncoder
     void StackCall(CVariable *flag, llvm::Function *F, unsigned char argSize, unsigned char retSize);
     void StackRet(CVariable *flag);
     void Loc(unsigned int line);
+    void File(std::string& s);
 
     inline void Jump(uint label);
     inline void Cast(CVariable* dst, CVariable* src);

IGC/Compiler/CISACodeGen/EmitVISAPass.cpp

@@ -469,6 +469,8 @@ bool EmitPass::runOnFunction(llvm::Function &F)
 
     DenseMap<Instruction*, uint32_t> rootToVISAId;
 
+    StringRef curSrcFile, curSrcDir;
+
     for(uint i = 0; i < m_pattern->m_numBlocks; i++)
     {
         SBasicBlock& block = m_pattern->m_blocks[i];
@@ -501,6 +503,18 @@ bool EmitPass::runOnFunction(llvm::Function &F)
             if ((*I).m_root->getDebugLoc())
             {
                 unsigned int curLineNumber = (*I).m_root->getDebugLoc().getLine();
+                auto&& srcFile = (*I).m_root->getDebugLoc()->getScope()->getFilename();
+                auto&& srcDir = (*I).m_root->getDebugLoc()->getScope()->getDirectory();
+                if (!curSrcFile.equals(srcFile) || !curSrcDir.equals(srcDir))
+                {
+                    curSrcFile = srcFile;
+                    curSrcDir = srcDir;
+                    IF_DEBUG_INFO_IF(m_pDebugEmitter, m_pDebugEmitter->BeginEncodingMark();)
+                    std::string fileName = std::string(curSrcDir);
+                    fileName += std::string(curSrcFile);
+                    m_encoder->File(fileName);
+                    IF_DEBUG_INFO_IF(m_pDebugEmitter, m_pDebugEmitter->EndEncodingMark();)
+                }
                 if (curLineNumber != lineNo)
                 {
                     IF_DEBUG_INFO_IF(m_pDebugEmitter, m_pDebugEmitter->BeginEncodingMark();)

visa/VISAKernel.h

@@ -491,7 +491,7 @@ class VISAKernelImpl : public VISAFunction
 
     CM_BUILDER_API int AppendVISASplitBarrierInst(bool isSignal);
 
-    CM_BUILDER_API int AppendVISAMiscFileInst(char *fileName);
+    CM_BUILDER_API int AppendVISAMiscFileInst(const char *fileName);
 
     CM_BUILDER_API int AppendVISAMiscLOC(unsigned int lineNumber);
 

visa/VISAKernelImpl.cpp

@@ -4800,7 +4800,7 @@ int VISAKernelImpl::AppendVISASplitBarrierInst(bool isSignal)
     return status;
 }
 
-int VISAKernelImpl::AppendVISAMiscFileInst(char *fileName)
+int VISAKernelImpl::AppendVISAMiscFileInst(const char *fileName)
 {
     AppendVISAInstCommon();
 #if defined(MEASURE_COMPILATION_TIME) && defined(TIME_BUILDER)

visa/include/VISABuilderAPIDefinition.h

@@ -521,7 +521,7 @@ class VISAKernel
     /// isSignal indicates whether this is the signal or wait for the barrier
     CM_BUILDER_API virtual int AppendVISASplitBarrierInst(bool isSignal) = 0;
 
-    CM_BUILDER_API virtual int AppendVISAMiscFileInst(char *fileName) = 0;
+    CM_BUILDER_API virtual int AppendVISAMiscFileInst(const char *fileName) = 0;
 
     CM_BUILDER_API virtual int AppendVISAMiscLOC(unsigned int lineNumber) = 0;