[clang] [clang][NFCI] Fix getGridValues for unsupported targets (PR #131023)

[Nick Sarnie via cfe-commits]

https://github.com/sarnex created https://github.com/llvm/llvm-project/pull/131023

I broke this in https://github.com/llvm/llvm-project/commit/f3cd2238383f695c719e7eab6aebec828781ec91, I should have added this to the `SPIRV64` subclass, but I accidentally added it to base `TargetInfo`.

>From 8607be8643c6f0a02748031b48a242526c5e9a5a Mon Sep 17 00:00:00 2001
From: "Sarnie, Nick" <nick.sarnie at intel.com>
Date: Wed, 12 Mar 2025 13:27:56 -0700
Subject: [PATCH] [clang][NFCI] Fix getGridValues for unsupported targets

Signed-off-by: Sarnie, Nick <nick.sarnie at intel.com>
---
 clang/include/clang/Basic/TargetInfo.h | 1 +
 clang/lib/Basic/Targets/SPIR.h         | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/clang/include/clang/Basic/TargetInfo.h b/clang/include/clang/Basic/TargetInfo.h
index d136b459e9cd4..158d0ded96bc4 100644
--- a/clang/include/clang/Basic/TargetInfo.h
+++ b/clang/include/clang/Basic/TargetInfo.h
@@ -1675,6 +1675,7 @@ class TargetInfo : public TransferrableTargetInfo,
   // access target-specific GPU grid values that must be consistent between
   // host RTL (plugin), deviceRTL and clang.
   virtual const llvm::omp::GV &getGridValue() const {
+    llvm_unreachable("getGridValue not implemented on this target");
     return llvm::omp::SPIRVGridValues;
   }
 
diff --git a/clang/lib/Basic/Targets/SPIR.h b/clang/lib/Basic/Targets/SPIR.h
index 610efa1fe00d9..78505d66d6f2f 100644
--- a/clang/lib/Basic/Targets/SPIR.h
+++ b/clang/lib/Basic/Targets/SPIR.h
@@ -370,6 +370,10 @@ class LLVM_LIBRARY_VISIBILITY SPIRV64TargetInfo : public BaseSPIRVTargetInfo {
 
   void getTargetDefines(const LangOptions &Opts,
                         MacroBuilder &Builder) const override;
+
+  const llvm::omp::GV &getGridValue() const override {
+    return llvm::omp::SPIRVGridValues;
+  }
 };
 
 class LLVM_LIBRARY_VISIBILITY SPIRV64AMDGCNTargetInfo final