[llvm] [KernelInfo] Implement new LLVM IR pass for GPU code analysis (PR #102944)

[Jorge Gorbe Moya via llvm-commits]

slackito wrote:

I was trying to fix the bazel build after this change, and it seems it introduces a couple of circular dependencies. `Analysis/KernelInfo.cpp` includes `Passes/PassBuilder.h` and `Target/TargetMachine.h`, but both `Passes` and `Target` already depend on `Analysis`.

I think the circular dependency can be broken by removing the PassBuilder.h include, which seems to be unused, and replacing the TargetMachine include with a forward decl. Something like this:
```
diff --git a/llvm/lib/Analysis/KernelInfo.cpp b/llvm/lib/Analysis/KernelInfo.cpp
index be9b1136321f..5175614645bf 100644
--- a/llvm/lib/Analysis/KernelInfo.cpp
+++ b/llvm/lib/Analysis/KernelInfo.cpp
@@ -15,17 +15,20 @@
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/Analysis/OptimizationRemarkEmitter.h"
+#include "llvm/Analysis/TargetTransformInfo.h"
 #include "llvm/IR/DebugInfo.h"
 #include "llvm/IR/Dominators.h"
 #include "llvm/IR/Instructions.h"
 #include "llvm/IR/Metadata.h"
 #include "llvm/IR/Module.h"
 #include "llvm/IR/PassManager.h"
-#include "llvm/Passes/PassBuilder.h"
-#include "llvm/Target/TargetMachine.h"
 
 using namespace llvm;
 
+namespace llvm {
+class TargetMachine;
+}
+
 #define DEBUG_TYPE "kernel-info"
 
 namespace {
```

https://github.com/llvm/llvm-project/pull/102944