[clang] [openmp] Add memory diff dump for kernel record-replay (PR #70667)

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

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``````````bash
git-clang-format --diff 6a62707c048e16ce9bad37ed8e3520799139436b 153c6d812939cd23bb71e53c71378117ed5b23c7 -- openmp/libomptarget/plugins-nextgen/common/PluginInterface/PluginInterface.cpp
``````````

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<details>
<summary>
View the diff from clang-format here.
</summary>

``````````diff
diff --git a/openmp/libomptarget/plugins-nextgen/common/PluginInterface/PluginInterface.cpp b/openmp/libomptarget/plugins-nextgen/common/PluginInterface/PluginInterface.cpp
index 8469e8eaf159..062165112317 100644
--- a/openmp/libomptarget/plugins-nextgen/common/PluginInterface/PluginInterface.cpp
+++ b/openmp/libomptarget/plugins-nextgen/common/PluginInterface/PluginInterface.cpp
@@ -93,58 +93,58 @@ private:
                                     MemoryStart, MemorySize, nullptr);
     if (Err)
       report_fatal_error("Error retrieving data for target pointer");
-    
-    std::error_code EC; 
-    raw_fd_ostream OS(Filename, EC); 
-    if(EC)
+
+    std::error_code EC;
+    raw_fd_ostream OS(Filename, EC);
+    if (EC)
       report_fatal_error("Error dumping memory to file " + Filename + " :" +
                          EC.message());
-    
-    if (saveDiff){
-      //Get the pre-record memory filename  
+
+    if (saveDiff) {
+      // Get the pre-record memory filename
       SmallString<128> InputFilename = {Filename.split('.').first, ".memory"};
-      //read the pre-record memorydump
-      auto InputFileBuffer = MemoryBuffer::getFileOrSTDIN(InputFilename); 
-      if(std::error_code EC = InputFileBuffer.getError())
+      // read the pre-record memorydump
+      auto InputFileBuffer = MemoryBuffer::getFileOrSTDIN(InputFilename);
+      if (std::error_code EC = InputFileBuffer.getError())
         report_fatal_error("Error reading pre-record device memory");
-      
-      StringRef InputBufferContents = (*InputFileBuffer)->getBuffer(); 
-      if(InputBufferContents.size() != MemorySize) 
+
+      StringRef InputBufferContents = (*InputFileBuffer)->getBuffer();
+      if (InputBufferContents.size() != MemorySize)
         report_fatal_error("Error: Pre-record device memory size mismatch");
-      
-      //get current memory contents
+
+      // get current memory contents
       StringRef DeviceMemoryContents(DeviceMemoryMB.get()->getBuffer().data(),
                                      DeviceMemoryMB.get()->getBuffer().size());
-      
-      //compare pre-record memorydump to current contents
+
+      // compare pre-record memorydump to current contents
       size_t i = 0;
-      while(i < MemorySize){
-        //if mismatch found, create a new diff line
-        //current format - location, size, differences ...
-        if(InputBufferContents[i] != DeviceMemoryContents[i]){
-          OS << i << " "; //marks the start offset
-          SmallVector<uint8_t, 128> modified; 
+      while (i < MemorySize) {
+        // if mismatch found, create a new diff line
+        // current format - location, size, differences ...
+        if (InputBufferContents[i] != DeviceMemoryContents[i]) {
+          OS << i << " "; // marks the start offset
+          SmallVector<uint8_t, 128> modified;
           modified.push_back(DeviceMemoryContents[i]);
           size_t j = 1;
-          //loop until next match is found
-          while(InputBufferContents[i+j] != DeviceMemoryContents[i+j]){
-            modified.push_back(DeviceMemoryContents[i+j]);
+          // loop until next match is found
+          while (InputBufferContents[i + j] != DeviceMemoryContents[i + j]) {
+            modified.push_back(DeviceMemoryContents[i + j]);
             j++;
           }
-          OS << j << " "; //marks the length of the mismatching sequence
-          for(const auto &value : modified)
+          OS << j << " "; // marks the length of the mismatching sequence
+          for (const auto &value : modified)
             OS << value << " ";
-          OS << "\n"; 
-          i+=j+1; 
-        }
-        else i++; 
+          OS << "\n";
+          i += j + 1;
+        } else
+          i++;
       }
-    }
-    else {
-      StringRef DeviceMemory(DeviceMemoryMB.get()->getBufferStart(), MemorySize);
+    } else {
+      StringRef DeviceMemory(DeviceMemoryMB.get()->getBufferStart(),
+                             MemorySize);
       OS << DeviceMemory;
     }
-    OS.close();  
+    OS.close();
   }
 
 public:
@@ -1350,7 +1350,7 @@ Error GenericDeviceTy::launchKernel(void *EntryPtr, void **ArgPtrs,
         GenericKernel.getName(), GenericKernel.getImage(), ArgPtrs, ArgOffsets,
         KernelArgs.NumArgs, KernelArgs.NumTeams[0], KernelArgs.ThreadLimit[0],
         KernelArgs.Tripcount);
-	
+
   if (RecordReplay.isRecording())
     RecordReplay.saveImage(GenericKernel.getName(), GenericKernel.getImage());
 

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https://github.com/llvm/llvm-project/pull/70667