[llvm] DXIL: Do not define any available runtime libcalls (PR #148628)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm created https://github.com/llvm/llvm-project/pull/148628

Previously this was reporting a default set of calls
as available.

>From 258b8313f47b72539b6f3c88503894b1b0ac351a Mon Sep 17 00:00:00 2001
From: Matt Arsenault <Matthew.Arsenault at amd.com>
Date: Mon, 14 Jul 2025 21:57:27 +0900
Subject: [PATCH] DXIL: Do not define any available runtime libcalls

Previously this was reporting a default set of calls
as available.
---
 llvm/include/llvm/IR/RuntimeLibcalls.td | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/llvm/include/llvm/IR/RuntimeLibcalls.td b/llvm/include/llvm/IR/RuntimeLibcalls.td
index 4ad6689691f8e..bea72e94aac37 100644
--- a/llvm/include/llvm/IR/RuntimeLibcalls.td
+++ b/llvm/include/llvm/IR/RuntimeLibcalls.td
@@ -1479,6 +1479,15 @@ def AVRSystemLibrary
               // Trigonometric rtlib functions
               avr_sin, avr_cos)>;
 
+//===----------------------------------------------------------------------===//
+// DXIL Runtime Libcalls
+//===----------------------------------------------------------------------===//
+
+def isDXIL : RuntimeLibcallPredicate<"TT.isDXIL()">;
+
+// No calls
+def DXILSystemLibrary : SystemRuntimeLibrary<isDXIL, (add)>;
+
 //===----------------------------------------------------------------------===//
 // Hexagon Runtime Libcalls
 //===----------------------------------------------------------------------===//