[clang] [llvm] [AMDGPU][clang][CodeGen][opt] Add late-resolved feature identifying predicates (PR #134016)

[Erich Keane via llvm-commits]

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@@ -15576,6 +15609,38 @@ static bool isOverflowingIntegerType(ASTContext &Ctx, QualType T) {
   return Ctx.getIntWidth(T) >= Ctx.getIntWidth(Ctx.IntTy);
 }
 
+static Expr *ExpandAMDGPUPredicateBI(ASTContext &Ctx, CallExpr *CE) {
+  if (!CE->getBuiltinCallee())
+    return CXXBoolLiteralExpr::Create(Ctx, false, Ctx.BoolTy, CE->getExprLoc());
+
+  if (Ctx.getTargetInfo().getTriple().isSPIRV()) {
+    CE->setType(Ctx.getLogicalOperationType());
+    return CE;
+  }
+
+  bool P = false;
+  auto &TI = Ctx.getTargetInfo();
+
+  if (CE->getDirectCallee()->getName() == "__builtin_amdgcn_processor_is") {
+    auto GFX = dyn_cast<StringLiteral>(CE->getArg(0)->IgnoreParenCasts());
+    auto TID = TI.getTargetID();
+    if (GFX && TID) {
+      auto N = GFX->getString();
+      P = TI.isValidCPUName(GFX->getString()) && TID->find(N) == 0;
+    }
+  } else {
+    auto FD = cast<FunctionDecl>(CE->getArg(0)->getReferencedDeclOfCallee());
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erichkeane wrote:

so many more missing stars.

https://github.com/llvm/llvm-project/pull/134016