[llvm] [SPIR-V] Strip convergence intrinsics before ISel (PR #75948)

[Ilia Diachkov via llvm-commits]

Nathan =?utf-8?q?Gauër?= <brioche at google.com>,
Nathan =?utf-8?q?Gauër?= <brioche at google.com>,
Nathan =?utf-8?q?Gauër?= <brioche at google.com>,
Nathan =?utf-8?q?Gauër?= <brioche at google.com>,
Nathan =?utf-8?q?Gauër?= <brioche at google.com>
Message-ID:
In-Reply-To: <llvm.org/llvm/llvm-project/pull/75948 at github.com>


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@@ -312,6 +316,54 @@ bool SPIRVPrepareFunctions::substituteIntrinsicCalls(Function *F) {
   return Changed;
 }
 
+bool SPIRVPrepareFunctions::stripConvergenceOperands(Function *F) {
+  DenseSet<Instruction *> to_remove;
+  for (BasicBlock &BB : *F) {
+    for (Instruction &I : BB) {
+      auto *CI = dyn_cast<CallInst>(&I);
+      if (CI == nullptr)
+        continue;
+
+      auto OB = CI->getOperandBundle(LLVMContext::OB_convergencectrl);
+      if (!OB.has_value())
+        continue;
+
+      auto *NewCall = CallBase::removeOperandBundle(
+          CI, LLVMContext::OB_convergencectrl, CI);
+      NewCall->copyMetadata(*CI);
+      CI->replaceAllUsesWith(NewCall);
+      to_remove.insert(CI);
+    }
+  }
+
+  for (Instruction *I : to_remove)
+    I->eraseFromParent();
+  return to_remove.size() != 0;
+}
+
+bool SPIRVPrepareFunctions::stripConvergenceIntrinsics(Function *F) {
+  DenseSet<Instruction *> to_remove;
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iliya-diyachkov wrote:

The same.

https://github.com/llvm/llvm-project/pull/75948