Update llvm to trunk r256633.

1 files changed, 84 insertions, 0 deletions

diff --git a/contrib/llvm/lib/Target/AMDGPU/AMDGPUAnnotateUniformValues.cpp b/contrib/llvm/lib/Target/AMDGPU/AMDGPUAnnotateUniformValues.cpp
new file mode 100644
index 0000000..dfddc34
--- /dev/null
+++ b/contrib/llvm/lib/Target/AMDGPU/AMDGPUAnnotateUniformValues.cpp
@@ -0,0 +1,84 @@
+//===-- AMDGPUAnnotateUniformValues.cpp - ---------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file
+/// This pass adds amdgpu.uniform metadata to IR values so this information
+/// can be used during instruction selection.
+//
+//===----------------------------------------------------------------------===//
+
+#include "AMDGPU.h"
+#include "AMDGPUIntrinsicInfo.h"
+#include "llvm/Analysis/DivergenceAnalysis.h"
+#include "llvm/IR/InstVisitor.h"
+#include "llvm/IR/IRBuilder.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/raw_ostream.h"
+
+#define DEBUG_TYPE "amdgpu-annotate-uniform"
+
+using namespace llvm;
+
+namespace {
+
+class AMDGPUAnnotateUniformValues : public FunctionPass,
+                       public InstVisitor<AMDGPUAnnotateUniformValues> {
+  DivergenceAnalysis *DA;
+
+public:
+  static char ID;
+  AMDGPUAnnotateUniformValues() :
+    FunctionPass(ID) { }
+  bool doInitialization(Module &M) override;
+  bool runOnFunction(Function &F) override;
+  const char *getPassName() const override { return "AMDGPU Annotate Uniform Values"; }
+  void getAnalysisUsage(AnalysisUsage &AU) const override {
+    AU.addRequired<DivergenceAnalysis>();
+    AU.setPreservesAll();
+ }
+
+  void visitLoadInst(LoadInst &I);
+
+};
+
+} // End anonymous namespace
+
+INITIALIZE_PASS_BEGIN(AMDGPUAnnotateUniformValues, DEBUG_TYPE,
+                      "Add AMDGPU uniform metadata", false, false)
+INITIALIZE_PASS_DEPENDENCY(DivergenceAnalysis)
+INITIALIZE_PASS_END(AMDGPUAnnotateUniformValues, DEBUG_TYPE,
+                    "Add AMDGPU uniform metadata", false, false)
+
+char AMDGPUAnnotateUniformValues::ID = 0;
+
+void AMDGPUAnnotateUniformValues::visitLoadInst(LoadInst &I) {
+  Value *Ptr = I.getPointerOperand();
+  if (!DA->isUniform(Ptr))
+    return;
+
+  if (Instruction *PtrI = dyn_cast<Instruction>(Ptr))
+    PtrI->setMetadata("amdgpu.uniform", MDNode::get(I.getContext(), {}));
+
+}
+
+bool AMDGPUAnnotateUniformValues::doInitialization(Module &M) {
+  return false;
+}
+
+bool AMDGPUAnnotateUniformValues::runOnFunction(Function &F) {
+  DA = &getAnalysis<DivergenceAnalysis>();
+  visit(F);
+
+  return true;
+}
+
+FunctionPass *
+llvm::createAMDGPUAnnotateUniformValues() {
+  return new AMDGPUAnnotateUniformValues();
+}