[clang] [CodeGen] Create IFUNCs in the program address space, not hard-coded 0 (PR #105726)

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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 2c12c1e755a1bf453b246027b450b3b8e30fb016 4be2b44f7e400b417e228766169b15f1a20d4602 --extensions cpp,c -- clang/lib/CodeGen/CodeGenModule.cpp clang/test/CodeGen/ifunc.c
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index ce681dd878..3fbadda5bd 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -4448,8 +4448,8 @@ void CodeGenModule::emitCPUDispatchDefinition(GlobalDecl GD) {
     // Fix up function declarations that were created for cpu_specific before
     // cpu_dispatch was known
     if (!isa<llvm::GlobalIFunc>(IFunc)) {
-      auto *GI = llvm::GlobalIFunc::create(DeclTy, AS, Linkage, "", ResolverFunc,
-                                           &getModule());
+      auto *GI = llvm::GlobalIFunc::create(DeclTy, AS, Linkage, "",
+                                           ResolverFunc, &getModule());
       replaceDeclarationWith(IFunc, GI);
       IFunc = GI;
     }
@@ -4532,9 +4532,8 @@ llvm::Constant *CodeGenModule::GetOrCreateMultiVersionResolver(GlobalDecl GD) {
   // cpu_dispatch will be emitted in this translation unit.
   if (getTarget().supportsIFunc() && !FD->isCPUSpecificMultiVersion()) {
     unsigned AS = getTypes().getTargetAddressSpace(FD->getType());
-    llvm::Type *ResolverType = llvm::FunctionType::get(
-        llvm::PointerType::get(DeclTy, AS),
-        false);
+    llvm::Type *ResolverType =
+        llvm::FunctionType::get(llvm::PointerType::get(DeclTy, AS), false);
     llvm::Constant *Resolver = GetOrCreateLLVMFunction(
         MangledName + ".resolver", ResolverType, GlobalDecl{},
         /*ForVTable=*/false);
@@ -6146,9 +6145,8 @@ void CodeGenModule::emitIFuncDefinition(GlobalDecl GD) {
                               /*ForVTable=*/false);
   llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType());
   unsigned AS = getTypes().getTargetAddressSpace(D->getType());
-  llvm::GlobalIFunc *GIF =
-      llvm::GlobalIFunc::create(DeclTy, AS, llvm::Function::ExternalLinkage,
-                                "", Resolver, &getModule());
+  llvm::GlobalIFunc *GIF = llvm::GlobalIFunc::create(
+      DeclTy, AS, llvm::Function::ExternalLinkage, "", Resolver, &getModule());
   if (Entry) {
     if (GIF->getResolver() == Entry) {
       Diags.Report(IFA->getLocation(), diag::err_cyclic_alias) << 1;

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https://github.com/llvm/llvm-project/pull/105726