[NVPTX] Set cache line size to 128 for __GCC_DESTRUCTIVE_SIZE

[jhuber6]

Summary:
According to the white papers, the cache line size on NVPTX
architectures is 128 bytes. This should be what's returned by these
preprocessor macros.

[llvmbot]

@llvm/pr-subscribers-clang

Author: Joseph Huber (jhuber6)

Changes

Summary:
According to the white papers, the cache line size on NVPTX
architectures is 128 bytes. This should be what's returned by these
preprocessor macros.

---

Full diff: https://github.com/llvm/llvm-project/pull/115248.diff

1 Files Affected:

• (modified) clang/lib/Basic/Targets/NVPTX.h (+4)

diff --git a/clang/lib/Basic/Targets/NVPTX.h b/clang/lib/Basic/Targets/NVPTX.h
index 165b28a60fb2a9..b1a07cdc6ed6bc 100644
--- a/clang/lib/Basic/Targets/NVPTX.h
+++ b/clang/lib/Basic/Targets/NVPTX.h
@@ -186,6 +186,10 @@ class LLVM_LIBRARY_VISIBILITY NVPTXTargetInfo : public TargetInfo {
   bool hasBFloat16Type() const override { return true; }
 
   OffloadArch getGPU() const { return GPU; }
+
+  std::pair<unsigned, unsigned> hardwareInterferenceSizes() const override {
+    return std::make_pair(128, 128);
+  }
 };
 } // namespace targets
 } // namespace clang